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Author	Jehanathan, N.; Lebedev, O.; Gélard, I.; Dubourdieu, C.; Van Tendeloo, G.
Title	Structure and defect characterization of multiferroic <tex>ReMnO$₃ films and multilayers by TEM			Type	A1 Journal article
Year	2010	Publication	Nanotechnology	Abbreviated Journal	Nanotechnology
Volume	21	Issue	7	Pages	075705,1-075705,11
Keywords	A1 Journal article; Electron microscopy for materials research (EMAT)
Abstract	Epitaxial rare earth manganite thin films (ReMnO3; Re = Tb, Ho, Er, and Y) and multilayers were grown by liquid injection metal organic chemical vapor deposition (MOCVD) on YSZ(111) and the same systems were grown c-oriented on Pt(111) buffered Si substrates. They have been structurally investigated by electron diffraction (ED) and high resolution transmission electron microscopy (HRTEM). Nanodomains of secondary orientation are observed in the hexagonal YMnO3 films. They are related to a YSZ(111) and Pt(111) misorientation. The epitaxial film thickness has an influence on the defect formation. TbO2 and Er2O3 inclusions are observed in the TbMnO3 and ErMnO3 films respectively. The structure and orientation of these inclusions are correlated to the resembling symmetry and structure of film and substrate. The type of defect formed in the YMnO3/HoMnO3 and YMnO3/ErMnO3 multilayers is also influenced by the type of substrate they are grown on. In our work, atomic growth models for the interface between the film/substrate are proposed and verified by comparison with observed and computer simulated images.
Address
Corporate Author				Thesis
Publisher		Place of Publication	Bristol	Editor
Language		Wos	000273824500018	Publication Date	2010-01-19
Series Editor		Series Title		Abbreviated Series Title
Series Volume		Series Issue		Edition
ISSN	0957-4484;1361-6528;	ISBN		Additional Links	UA library record; WoS full record; WoS citing articles
Impact Factor	3.44	Times cited	15	Open Access
Notes	Esteem 026019			Approved	Most recent IF: 3.44; 2010 IF: 3.652
Call Number	UA @ lucian @ c:irua:80436			Serial	3274
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Author	Suarez-Martinez, I.; Ewels, C.P.; Ke, X.; Van Tendeloo, G.; Thiess, S.; Drube, W.; Felten, A.; Pireaux, J.-J.; Ghijsen, J.; Bittencourt, C.
Title	Study of the interface between rhodium and carbon nanotubes			Type	A1 Journal article
Year	2010	Publication	ACS nano	Abbreviated Journal	Acs Nano
Volume	4	Issue	3	Pages	1680-1686
Keywords	A1 Journal article; Electron microscopy for materials research (EMAT)
Abstract	X-ray photoelectron spectroscopy at 3.5 keV photon energy, in combination with high-resolution transmission electron microscopy, is used to follow the formation of the interface between rhodium and carbon nanotubes. Rh nucleates at defect sites, whether initially present or induced by oxygen-plasma treatment. More uniform Rh cluster dispersion is observed on plasma-treated CNTs. Experimental results are compared to DFT calculations of small Rh clusters on pristine and defective graphene. While Rh interacts as strongly with the carbon as Ti, it is less sensitive to the presence of oxygen, suggesting it as a good candidate for nanotube contacts.
Address
Corporate Author				Thesis
Publisher		Place of Publication		Editor
Language		Wos	000275858200053	Publication Date	2010-02-18
Series Editor		Series Title		Abbreviated Series Title
Series Volume		Series Issue		Edition
ISSN	1936-0851;1936-086X;	ISBN		Additional Links	UA library record; WoS full record; WoS citing articles
Impact Factor	13.942	Times cited	26	Open Access
Notes				Approved	Most recent IF: 13.942; 2010 IF: 9.865
Call Number	UA @ lucian @ c:irua:82440			Serial	3337
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Author	Tan, H.; Lebedev, O.I.; McLaughlin, A.C.; Van Tendeloo, G.
Title	The superstructure and superconductivity of Ru1222 based RuSr₂Gd_2-x-yY_yCe_xCu₂O_10-\delta compounds			Type	A1 Journal article
Year	2010	Publication	Superconductor science and technology	Abbreviated Journal	Supercond Sci Tech
Volume	23	Issue	11	Pages	115013-115013,8
Keywords	A1 Journal article; Electron microscopy for materials research (EMAT)
Abstract	For the first time, the local structure and physical properties of Ru1222 based compounds (RuSr(2)Gd(1.4)Ce(0.6)Cu(2)O(10-delta) and RuSr(2)Gd(1.8-x)Y(0.2)CexCu(2)O(10) (x = 0.90-0.55)) have been investigated and analyzed together on the very same compounds. The Ru1222 superstructure was confirmed by TEM at a local scale and was suggested to have an orthorhombic symmetry with space group Aba2 and lattice parameters a(s) similar or equal to root 2a, b(s) similar or equal to root 2a and c(s) = c. This new Ru1222 superstructure distortion from tetragonal symmetry is proposed to have a positive correlation with the superconductivity variation of these compounds. The more the distortion towards orthorhombic symmetry, the higher the critical superconducting temperature these compounds can achieve. The T(c)(0) of RuSr(2)Gd(1.8-x)Y(0.2)Ce(x)Cu(2)O(10-delta) (x = 0.85-0.55) increases monotonically from 4 to 16 K when x decreases from 0.85 to 0.70, then RuSr(2)Gd(2)Cu(2)O(8) defects emerge and the T(c) decreases with decreasing x. Ru1212 defects are observed to intergrow epitaxially with the Ru1222 structure as lamellas along the c-axis in RuSr(2)Gd(1.4)Ce(0.6)Cu(2)O(10-delta). Although Ru1212 is a superconductor, the intergrowth severely restrains its superconductivity.
Address
Corporate Author				Thesis
Publisher		Place of Publication	Bristol	Editor
Language		Wos	000284308000013	Publication Date	2010-10-09
Series Editor		Series Title		Abbreviated Series Title
Series Volume		Series Issue		Edition
ISSN	0953-2048;1361-6668;	ISBN		Additional Links	UA library record; WoS full record; WoS citing articles
Impact Factor	2.878	Times cited	1	Open Access
Notes	Fwo; Esteem 026019			Approved	Most recent IF: 2.878; 2010 IF: 2.402
Call Number	UA @ lucian @ c:irua:95553			Serial	3385
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Author	Chen, L.; Kirilenko, D.; Stesmans, A.; Nguyen, X.S.; Binnemans, K.; Goderis, B.; Vanacken, J.; Lebedev, O.; Van Tendeloo, G.; Moshchalkov, V.V.
Title	Symmetry and electronic states of Mn²⁺ in ZnS nanowires with mixed hexagonal and cubic stacking			Type	A1 Journal article
Year	2010	Publication	Applied physics letters	Abbreviated Journal	Appl Phys Lett
Volume	97	Issue	4	Pages	041918,1-041918,3
Keywords	A1 Journal article; Electron microscopy for materials research (EMAT)
Abstract	Electron spin resonance and electronic spectroscopy techniques were used to study the symmetry and electronic structure of Mn2+ dopants in solvothermally synthesized ZnS nanowires. The average diameter of ∼ 5 nm leads to the observable quantum confinement effects in the photoluminescence excitation spectra. The results clearly demonstrate the three symmetry locations of Mn2+ incorporation. Together with the inferred Mn2+ center densities, these data indicate a much higher efficiency of Mn2+ substitution in the nanowire sample with about two times larger diameter.
Address
Corporate Author				Thesis
Publisher	American Institute of Physics	Place of Publication	New York, N.Y.	Editor
Language		Wos	000281059200038	Publication Date	2010-08-02
Series Editor		Series Title		Abbreviated Series Title
Series Volume		Series Issue		Edition
ISSN	0003-6951;	ISBN		Additional Links	UA library record; WoS full record; WoS citing articles
Impact Factor	3.411	Times cited	5	Open Access
Notes	Methusalem			Approved	Most recent IF: 3.411; 2010 IF: 3.841
Call Number	UA @ lucian @ c:irua:84869			Serial	3403
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Author	El Shinawi, H.; Bertha, A.; Hadermann, J.; Herranz, T.; Santos, B.; Marco, J.F.; Berry, F.J.; Greaves, C.
Title	Synthesis and characterization of La_1+xSr_2-xCoMnO_7-\delta (x=0,0.2; \delta=0,1)			Type	A1 Journal article
Year	2010	Publication	Journal of solid state chemistry	Abbreviated Journal	J Solid State Chem
Volume	183	Issue	6	Pages	1347-1353
Keywords	A1 Journal article; Electron microscopy for materials research (EMAT)
Abstract	The n=2 Ruddlesden-Popper phases LaSr(2)CoMnO(7) and La(1 2)Sr(1 8)CoMnO(7) have been synthesized by a sol-gel method The O6-type phases LaSr(2)CoMnO(6) and La(1 2)Sr(1 8)CoMnO(6) were produced by reduction of the 07 phases under a hydrogen atmosphere The materials crystallize in the tetragonal I4/mmm space group with no evidence of long-range cation order in the neutron and electron diffraction data Oxygen vacancies in the reduced materials are located primarily at the common apex of the double perovskite layers giving rise to square pyramidal coordination around cobalt and manganese ions. The oxidation states Co(3+)/Mn(4+) and Co(2+)/Mn(3+) predominate in the as-prepared and reduced materials, respectively The materials are spin glasses at low temperature and the dominant magnetic interactions change from ferro- to antiferromagnetic following reduction (C) 2010 Elsevier Inc All rights reserved
Address
Corporate Author				Thesis
Publisher		Place of Publication	London	Editor
Language		Wos	000278750100021	Publication Date	2010-04-17
Series Editor		Series Title		Abbreviated Series Title
Series Volume		Series Issue		Edition
ISSN	0022-4596;	ISBN		Additional Links	UA library record; WoS full record; WoS citing articles
Impact Factor	2.299	Times cited	5	Open Access
Notes				Approved	Most recent IF: 2.299; 2010 IF: 2.261
Call Number	UA @ lucian @ c:irua:99209			Serial	3417
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Author	Verlooy, P.L.H.; Robeyns, K.; van Meervelt, L.; Lebedev, O.I.; Van Tendeloo, G.; Martens, J.A.; Kirschhock, C.E.A.
Title	Synthesis and characterization of the new cyclosilicate hydrate (hexamethyleneimine)₄.[Si₈O₁₆(OH)₄].12H₂O			Type	A1 Journal article
Year	2010	Publication	Microporous and mesoporous materials: zeolites, clays, carbons and related materials	Abbreviated Journal	Micropor Mesopor Mat
Volume	130	Issue	1/3	Pages	14-20
Keywords	A1 Journal article; Electron microscopy for materials research (EMAT)
Abstract	A new cyclosilicate hydrate with composition (C6H14N)4·[Si8O16(OH)4]·12H2O was crystallized and the structure determined by single-crystal X-ray diffraction. The structure, described by the tetragonal space group I41/a, with unit cell dimensions of a = 39.2150(2) Å and c = 14.1553(2) Å, contains columns of hydrogen-bonded cubic octamer silicate anions. The space between silicate columns holds hydrogen-bonded water and protonated hexamethyleneimine molecules compensating the negative charge of the silicate. The crystal water can be removed resulting in a rearrangement of the columns into orthorhombic symmetry. Removal of the organic moiety causes amorphisation. Flash evacuation results in a new microporous material with pore volumes typical of a zeolite.
Address
Corporate Author				Thesis
Publisher		Place of Publication	Amsterdam	Editor
Language		Wos	000275702600003	Publication Date	2009-10-14
Series Editor		Series Title		Abbreviated Series Title
Series Volume		Series Issue		Edition
ISSN	1387-1811;	ISBN		Additional Links	UA library record; WoS full record; WoS citing articles
Impact Factor	3.615	Times cited	5	Open Access
Notes				Approved	Most recent IF: 3.615; 2010 IF: 3.220
Call Number	UA @ lucian @ c:irua:82448			Serial	3418
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Author	Kalyuzhnaya, A.S.; Abakumov, A.M.; Rozova, M.G.; d' Hondt, H.; Hadermann, J.; Antipov, E.V.
Title	Synthesis and crystal structure of the new complex oxide Ca₇Mn_2.14Ga_5.86O_17.93			Type	A1 Journal article
Year	2010	Publication	Russian chemical bulletin	Abbreviated Journal	Russ Chem B+
Volume	59	Issue	4	Pages	706-711
Keywords	A1 Journal article; Electron microscopy for materials research (EMAT)
Abstract	The complex oxide Ca7Mn2.14Ga5.86O17.93 was synthesized by the solid-state reaction in a sealed evacuated quartz tube at 1000 °C. Its crystal structure was determined by electron diffraction and X-ray powder diffraction. The structure can be represented as a tetrahedral framework, viz., the polyanion [(Mn0.285Ga0.715)15O29.86]19- stabilized by the incorporated cation [Ca14GaO6]19+. The polycation consists of the GaO6 octahedra surrounded by the Ca atoms, which are arranged to form a cube capped at all places. The tetrahedral framework is partially disordered due to the presence of tetrahedra with two possible orientations in the positions (0, 0, 0) and (x, x, x) with x ≈ 0.15 and 0.17. The relationship between the Ca7Mn2.14Ga5.86O17.93 structures and related ordered phases with the symmetry F23, as well as the influence of the oxygen content on the ordering in the tetrahedral framework, are discussed.
Address
Corporate Author				Thesis
Publisher		Place of Publication		Editor
Language		Wos	000283302000006	Publication Date	2010-10-20
Series Editor		Series Title		Abbreviated Series Title
Series Volume		Series Issue		Edition
ISSN	1066-5285;1573-9171;	ISBN		Additional Links	UA library record; WoS full record; WoS citing articles
Impact Factor	0.529	Times cited	1	Open Access
Notes				Approved	Most recent IF: 0.529; 2010 IF: 0.629
Call Number	UA @ lucian @ c:irua:85675			Serial	3427
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Author	Yang, T.; Abakumov, A.M.; Hadermann, J.; Van Tendeloo, G.; Nowik, I.; Stephens, P.W.; Hamberger, J.; Tsirlin, A.A.; Ramanujachary, K.V.; Lofland, S.; Croft, M.; Ignatov, A.; Sun, J.; Greenblatt, M.
Title	_BiMnFe₂O₆, a polysynthetically twinned hcp MO structure			Type	A1 Journal article
Year	2010	Publication	Chemical science	Abbreviated Journal	Chem Sci
Volume	1	Issue	6	Pages	751-762
Keywords	A1 Journal article; Electron microscopy for materials research (EMAT)
Abstract	The most efficient use of spatial volume and the lowest potential energies in the metal oxide structures are based on cubic close packing (ccp) or hexagonal close packing (hcp) of anions with cations occupying the interstices. A promising way to tune the composition of close packed oxides and design new compounds is related to fragmenting the parent structure into modules by periodically spaced planar interfaces, such as twin planes at the unit cell scale. The unique crystal chemistry properties of cations with a lone electron pair, such as Bi3+ or Pb2+, when located at interfaces, enables them to act as chemical scissors, to help relieve configurational strain. With this approach, we synthesized a new oxide, BiMnFe2O6, where fragments of the hypothetical hcp oxygen-based MO structure (the NiAs structure type), for the first time, serve as the building modules in a complex transition metal oxide. Mn3+ and Fe3+ ions are randomly distributed in two crystallographically independent sites (M1 and M2). The structure consists of quasi two-dimensional blocks of the 2H hexagonal close packed MO structure cut along the (114) crystal plane of the hcp lattice and stacked along the c axis. The blocks are related by a mirror operation that allows BiMnFe2O6 to be considered as a polysynthetically twinned 2H hcp MO structure. The transition to an AFM state with an incommensurate spin configuration at [similar] 212 K is established by 57Fe Mössbauer spectroscopy, magnetic susceptibility, specific heat and low temperature powder neutron diffraction.
Address
Corporate Author				Thesis
Publisher	Royal Society of Chemistry	Place of Publication	Cambridge	Editor
Language		Wos	000283939200013	Publication Date	2010-10-12
Series Editor		Series Title		Abbreviated Series Title
Series Volume		Series Issue		Edition
ISSN	2041-6520;2041-6539;	ISBN		Additional Links	UA library record; WoS full record; WoS citing articles
Impact Factor	8.668	Times cited	12	Open Access
Notes				Approved	Most recent IF: 8.668; 2010 IF: NA
Call Number	UA @ lucian @ c:irua:85823			Serial	3517
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Author	Morozov, V.A.; Arakcheeva, A.V.; Konovalova, V.V.; Pattison, P.; Chapuis, G.; Lebedev, O.I.; Fomichev, V.V.; Van Tendeloo, G.
Title	LiZnNb₄O_11.5 : a novel oxygen deficient compound in the Nb-rich part of the Li₂O-ZnO-Nb₂O₅ system			Type	A1 Journal article
Year	2010	Publication	Journal of solid state chemistry	Abbreviated Journal	J Solid State Chem
Volume	183	Issue	2	Pages	408-418
Keywords	A1 Journal article; Electron microscopy for materials research (EMAT)
Abstract	A novel lithium zinc niobium oxide LiZnNb(4)O(11.5) (LZNO) has been found in the Nb-rich part of Li(2)O-ZnO-Nb(2)O(5) system. LZNO, with an original alpha-PbO(2) related structure, has been synthesized by the routine ceramic technique and characterized by X-ray diffraction and transmission electron microscopy (TEM). Reflections belonging to the LZNO phase, observed in X-ray powder diffraction (XRPD) and electron diffraction, have been indexed as monoclinic with unit cell parameters a=17.8358(9)angstrom, b=15.2924(7)angstrom, c=5.0363(3)angstrom and gamma=96.607(5)degrees or as alpha-PbO(2)-like with lattice constants a=4.72420(3)angstrom, b=5.72780(3)angstrom, c=5.03320(3)angstrom, gamma=90.048(16)degrees and modulation vector q=0.3a+1.1b indicating a commensurately modulated alpha-PbO(2) related structure. The monoclinic cell is a supercell related to the latter. Using synchrotron powder diffraction data, the structure has been solved and refined as a commensurate modulation (superspace group P112(1)/n(alpha beta 0)00) as well as a supercell (space group P2(1)/b). The superspace description allows us to consider the LZNO structure as a member of the proposed alpha-PbO(2)-Z (3 + 1)D structure type, which unifies both incommensurately and commensurately modulated structures. HRTEM reveals several types of defects in LZNO and structural models for these defects are proposed. Two new phases in Li(2)O-ZnO-Nb(2)O(5) system are predicted on the basis of this detailed HRTEM analysis. (C) 2009 Elsevier Inc. All rights reserved.
Address
Corporate Author				Thesis
Publisher		Place of Publication	London	Editor
Language		Wos	000274497600020	Publication Date	2009-12-17
Series Editor		Series Title		Abbreviated Series Title
Series Volume		Series Issue		Edition
ISSN	0022-4596;	ISBN		Additional Links	UA library record; WoS full record; WoS citing articles
Impact Factor	2.299	Times cited	9	Open Access
Notes	Iap-Vi			Approved	Most recent IF: 2.299; 2010 IF: 2.261
Call Number	UA @ lucian @ c:irua:95646			Serial	3542
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Author	Lorenz, H.; Turner, S.; Lebedev, O.I.; Van Tendeloo, G.; Klötzer, B.; Rameshan, C.; Pfaller, K.; Penner, S.
Title	Pd-In₂O₃ interaction due to reduction in hydrogen: consequences for methanol steam reforming			Type	A1 Journal article
Year	2010	Publication	Applied catalysis : A : general	Abbreviated Journal	Appl Catal A-Gen
Volume	374	Issue	1/2	Pages	180-188
Keywords	A1 Journal article; Electron microscopy for materials research (EMAT)
Abstract	Two different Pd/In2O3 samples including a thin film model catalyst with well-defined Pd particles grown on NaCl(0 0 1) supports and a powder catalyst prepared by an impregnation technique are examined by electron microscopy, X-ray diffraction and catalytic measurements in methanol steam reforming in order to correlate the formation of different oxide-supported bimetallic PdIn phases with catalytic activity and selectivity. A PdIn shell around the Pd particles is observed on the thin film catalyst after embedding the Pd particles in In2O3 at 300 K, likely because alloying to PdIn and oxidation to In2O3 are competing processes. Increased PdIn bimetallic formation is observed up to 573 K reduction temperature until at 623 K the film stability limit in hydrogen is reached. Oxidative treatments at 573 K lead to decomposition of PdIn and to the formation of an In2O3 shell covering the Pd particles, which irreversibly changes the activity and selectivity pattern to clean In2O3. PdIn and Pd2In3 phases are obtained on the powder catalyst after reduction at 573 K and 673 K, respectively. Only CO2-selective methanol steam reforming is observed in the reduction temperature range between 473 K and 573 K. After reduction at 673 K encapsulation of the bimetallic particles by crystalline In2O3 suppresses CO2 formation and only activity and selectivity of clean In2O3 are measured.
Address
Corporate Author				Thesis
Publisher		Place of Publication	Amsterdam	Editor
Language		Wos	000274869900023	Publication Date	2009-12-18
Series Editor		Series Title		Abbreviated Series Title
Series Volume		Series Issue		Edition
ISSN	0926-860X;	ISBN		Additional Links	UA library record; WoS full record; WoS citing articles
Impact Factor	4.339	Times cited	55	Open Access
Notes	Esteem 026019			Approved	Most recent IF: 4.339; 2010 IF: 3.384
Call Number	UA @ lucian @ c:irua:81801			Serial	3553
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Author	Kovba, M.L.; Skolis, Y.Y.; Abakumov, A.M.; Hadermann, J.; Sukhushina, I.S.
Title	The synthesis and thermodynamic properties of strontium fluoromanganite Sr_2.5Mn₆O_12.5-\deltaF₂			Type	A1 Journal article
Year	2010	Publication	Russian journal of physical chemistry A	Abbreviated Journal	Russ J Phys Chem A+
Volume	84	Issue	12	Pages	2033-2038
Keywords	A1 Journal article; Electron microscopy for materials research (EMAT)
Abstract	The existence of the [SrF(0.8)O(0.1)](2.5)[Mn(6)O(12)] = Sr(2.5)Mn(6)O(12.5 – delta)F(2) compound was established in the SrO-Mn(2)O(3)-SrF(2) system at 900A degrees C and p(O(2)) = 1 atm. The crystal structure of strontium fluoromanganite was determined from the X-ray powder diffraction data, electron diffraction, and high-resolution electron microscopy. It can be described in the monoclynic system with four Miller hklm indices: hklm: H = h a* + k b* + l c (1) () + m q (1), q (1), q (1) = c (2) () = gamma c (1) (*) , gamma a parts per thousand 0.632, a a parts per thousand a a parts per thousand 9.72 , b a parts per thousand 9.55 , c (1) a parts per thousand 2.84 , c (2) a parts per thousand 4.49 , monoclinic angle gamma a parts per thousand 95.6A degrees. The electromotive force method with a solid fluorine ion electrolyte was used to refine the composition of fluoromanganite and determine the thermodynamic functions of its formation from phases neighboring in the phase diagram (SrMn(3)O(6), Mn(2)O(3), SrF(2), and oxygen), Delta GA degrees, kJ/mol = -(111.7 +/- 1.9) + (89.5 +/- 1.5) x 10(-3) T.
Address
Corporate Author				Thesis
Publisher		Place of Publication	London	Editor
Language		Wos	000284775000004	Publication Date	2011-02-11
Series Editor		Series Title		Abbreviated Series Title
Series Volume		Series Issue		Edition
ISSN	0036-0244;1531-863X;	ISBN		Additional Links	UA library record; WoS full record; WoS citing articles
Impact Factor	0.581	Times cited	1	Open Access
Notes				Approved	Most recent IF: 0.581; 2010 IF: 0.503
Call Number	UA @ lucian @ c:irua:99190			Serial	3601
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Author	Ke, X.; Bals, S.; Cott, D.; Hantschel, T.; Bender, H.; Van Tendeloo, G.
Title	Three-dimensional analysis of carbon nanotube networks in interconnects by electron tomography without missing wedge artifacts			Type	A1 Journal article
Year	2010	Publication	Microscopy and microanalysis	Abbreviated Journal	Microsc Microanal
Volume	16	Issue	2	Pages	210-217
Keywords	A1 Journal article; Electron microscopy for materials research (EMAT)
Abstract	The three-dimensional (3D) distribution of carbon nanotubes (CNTs) grown inside semiconductor contact holes is studied by electron tomography. The use of a specialized tomography holder results in an angular tilt range of ±90°, which means that the so-called missing wedge is absent. The transmission electron microscopy (TEM) sample for this purpose consists of a micropillar that is prepared by a dedicated procedure using the focused ion beam (FIB) but keeping the CNTs intact. The 3D results are combined with energy dispersive X-ray spectroscopy (EDS) to study the relation between the CNTs and the catalyst particles used during their growth. The reconstruction, based on the full range of tilt angles, is compared with a reconstruction where a missing wedge is present. This clearly illustates that the missing wedge will lead to an unreliable interpretation and will limit quantitative studies
Address
Corporate Author				Thesis
Publisher		Place of Publication	Cambridge, Mass.	Editor
Language		Wos	000276137200011	Publication Date	2010-02-26
Series Editor		Series Title		Abbreviated Series Title
Series Volume		Series Issue		Edition
ISSN	1431-9276;1435-8115;	ISBN		Additional Links	UA library record; WoS full record; WoS citing articles
Impact Factor	1.891	Times cited	42	Open Access
Notes	Esteem 026019; Fwo; Iap-Vi			Approved	Most recent IF: 1.891; 2010 IF: 3.259
Call Number	UA @ lucian @ c:irua:82279			Serial	3642
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Author	Delville, R.; Schryvers, D.
Title	Transmission electron microscopy study of combined precipitation of Ti₂Ni(Pd) and Ti₂Pd(Ni) in a Ti₅₀Ni₃₀Pd₂₀ alloy			Type	A1 Journal article
Year	2010	Publication	Intermetallics	Abbreviated Journal	Intermetallics
Volume	18	Issue	12	Pages	2353-2360
Keywords	A1 Journal article; Electron microscopy for materials research (EMAT)
Abstract	We report a new mode of precipitation in a B19 martensitic Ti50Ni30Pd20 shape memory alloy consisting of a central Ti2Ni(Pd) precipitate surrounded by an austenite area containing Ti2Pd(Ni) precipitates. The morphology and crystallography of the precipitation area is investigated using conventional and high resolution electron microscopy. In particular, the orientation relationship and the coherency strain between the Ti2Pd(Ni) precipitate and the surrounding retained B2 matrix are discussed. A study of local composition in relation with a ternary phase diagram using X-ray energy dispersive spectroscopy with a nanoprobe gives evidences of the formation mechanism.
Address
Corporate Author				Thesis
Publisher		Place of Publication	Chicago, Ill.	Editor
Language		Wos	000284447500014	Publication Date	2010-09-04
Series Editor		Series Title		Abbreviated Series Title
Series Volume		Series Issue		Edition
ISSN	0966-9795;	ISBN		Additional Links	UA library record; WoS full record; WoS citing articles
Impact Factor	3.14	Times cited	9	Open Access
Notes	Multimat; Iap			Approved	Most recent IF: 3.14; 2010 IF: 2.335
Call Number	UA @ lucian @ c:irua:84473			Serial	3714
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Author	Efimov, K.; Xu, Q.; Feldhoff, A.
Title	Transmission electron microscopy study of BA_0.5Sr_0.5CO_0.8Fe_0.2O_3-\delta Perovskite decomposition at intermediate temperatures			Type	A1 Journal article
Year	2010	Publication	Chemistry of materials	Abbreviated Journal	Chem Mater
Volume	22	Issue	21	Pages	5866-5875
Keywords	A1 Journal article; Electron microscopy for materials research (EMAT)
Abstract	The cubic perovskite Ba(0.5)Sr(0.5)Co(0.8)Fe(0.2)O(3-delta) (denoted BSCF) is the state-of-the-art ceramic membrane material used for oxygen separation technologies above 1150 K. BSCF is a mixed oxygen-ion and electron conductor (MIEC) and exhibits one of the highest oxygen permeabilities reported so far for dense oxides. Additionally, it has excellent phase stability above 1150 K. In the intermediate temperature range (750-1100 K), however, BSCF suffers from a slow decomposition of the cubic perovskite into variants with hexagonal stacking that are barriers to oxygen transport. To elucidate details of the decomposition process, both sintered BSCF ceramic and powder were annealed for 180-240 h in ambient air at temperatures below 1123 K and analyzed by different transmission electron microscopy techniques. Aside from hexagonal perovskite Ba(0.5)Sr(0.5)CoO(3-delta) , the formation of lamellar noncubic phases was observed in the quenched samples. The structure of the lamellae with the previously unknown composition Ba(1-x)Sr(x)Co(2-y)Fe(y)O(5-delta) was found to be related to the 15R hexagonal perovskite polytype. The valence and spin-state transition of cobalt leading to a considerable diminution of its ionic radius can be considered a reason for BSCF's inherent phase instability at intermediate temperatures.
Address
Corporate Author				Thesis
Publisher		Place of Publication	Washington, D.C.	Editor
Language		Wos	000283623700010	Publication Date	2010-10-13
Series Editor		Series Title		Abbreviated Series Title
Series Volume		Series Issue		Edition
ISSN	0897-4756;1520-5002;	ISBN		Additional Links	UA library record; WoS full record; WoS citing articles
Impact Factor	9.466	Times cited	117	Open Access
Notes	Esteem 026019			Approved	Most recent IF: 9.466; 2010 IF: 6.400
Call Number	UA @ lucian @ c:irua:95546			Serial	3720
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Author	Li, Y.; Yang, X.-Y.; Rooke, J.; Van Tendeloo, G.; Su, B.-L.
Title	Ultralong Cu(OH)(2) and CuO nanowire bundles: PEG200-directed crystal growth for enhanced photocatalytic performance			Type	A1 Journal article
Year	2010	Publication	Journal of colloid and interface science	Abbreviated Journal	J Colloid Interf Sci
Volume	348	Issue	2	Pages	303-312
Keywords	A1 Journal article; Electron microscopy for materials research (EMAT)
Abstract	Ultralong Cu(OH)(2) and CuO nanowire bundles with lengths ranging from tens to hundreds of micrometers have been selectively synthesized on a large scale by a facile solution-phase method, using PEG200 as growth-directing agent. The growth mechanisms were investigated by monitoring the nanowire evolution process. The results showed that under the action of PEG200 molecules, the Cu(OH)(2) and CuO nanowires were first formed through oriented attachment of colloidal particles, then through side self-assembly leading to nanowire bundles, and finally to CuO nanoleaves. PEG200 plays a critical role in the synthesis of nanowires as it not only prevents the random aggregation of colloidal particles toward CuO nanoleaves but also helps to orientate nanowire growth by the coalescence and alignment in one direction of the colloidal particles. The concentration of OH(-) in the reaction system is also important for nanowire growth. In the absence of PEG200, nanoleaves are formed by an Ostwald ripening process. The band-gap value estimated from a UV-Vis absorption spectrum of CuO nanowire bundles is 2.32 eV. The photodegradation of a model pollutant, rhodamine B, by CuO nanowires and nanoleaves was compared with commercial nanopowders, showing that the as-synthesized ultralong CuO polycrystalline nanowire bundles have an enhanced photocatalytic activity with 87% decomposition of rhodamine B after an 8-h reaction, which was much higher than that of single-crystal nanoleaves (61%) and commercial nanopowders (32%). The origin of the high photocatalytic activity of these new polycrystalline CuO nanowire bundles has been discussed. This present work reveals that the (0 0 2) crystallographic surface is more favorable for photocatalytic decomposition of organic compounds and that these ultralong CuO nanowire bundles are potential candidates for photocatalysts in wastewater treatment. (C) 2010 Elsevier Inc. All rights reserved.
Address
Corporate Author				Thesis
Publisher		Place of Publication	New York, N.Y.	Editor
Language		Wos	000279968700002	Publication Date	2010-04-26
Series Editor		Series Title		Abbreviated Series Title
Series Volume		Series Issue		Edition
ISSN	0021-9797;	ISBN		Additional Links	UA library record; WoS full record; WoS citing articles
Impact Factor	4.233	Times cited	70	Open Access
Notes				Approved	Most recent IF: 4.233; 2010 IF: 3.068
Call Number	UA @ lucian @ c:irua:95589			Serial	3795
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Author	van den Heuvel, W.; Tikhomirov, V.K.; Kirilenko, D.; Schildermans, N.; Chibotaru, L.F.; Vanacken, J.; Gredin, P.; Mortier, M.; Van Tendeloo, G.; Moshchalkov, V.V.
Title	Ultralow blocking temperature and breakdown of the giant spin model in Er³⁺-doped nanoparticles			Type	A1 Journal article
Year	2010	Publication	Physical review : B : condensed matter and materials physics	Abbreviated Journal	Phys Rev B
Volume	82	Issue	9	Pages	094421-094421,8
Keywords	A1 Journal article; Electron microscopy for materials research (EMAT)
Abstract	The magnetization of luminescent Er3+-doped PbF2 nanoparticles (formula Er0.3Pb0.7F2.3) has been studied. Despite the high concentration of the doping Er3+ ions and relatively large size (8 nm) of these nanoparticles we have found no deviation between field-cooled and zero-field-cooled magnetization curves down to T=0.35 K, which points out an ultralow blocking temperature for the reversal of magnetization. We also have found strongly deviating magnetization curves M(H/T) for different temperatures T. These results altogether show that the investigated nanoparticles are not superparamagnetic, but rather each Er3+ ion in these nanoparticles is found in a paramagnetic state down to very low temperatures, which implies the breakdown of the Néel-Brown giant spin model in the case of these nanoparticles. Calculations of magnetization within a paramagnetic model of noninteracting Er3+ ions completely support this conclusion. Due to the ultralow blocking temperature, these nanoparticles have a potential for magnetic field-induced nanoscale refrigeration with an option of their optical localization and temperature control.
Address
Corporate Author				Thesis
Publisher		Place of Publication		Editor
Language		Wos	000281773300005	Publication Date	2010-09-13
Series Editor		Series Title		Abbreviated Series Title
Series Volume		Series Issue		Edition
ISSN	1098-0121;1550-235X;	ISBN		Additional Links	UA library record; WoS full record; WoS citing articles
Impact Factor	3.836	Times cited	11	Open Access
Notes	Fwo			Approved	Most recent IF: 3.836; 2010 IF: 3.774
Call Number	UA @ lucian @ c:irua:85423			Serial	3796
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Author	Bekermann, D.; Gasparotto, A.; Barreca, D.; Devi, A.; Fischer, R.A.; Kete, M.; Štangar, U.L.; Lebedev, O.I.; Maccato, C.; Tondello, E.; Van Tendeloo, G.
Title	ZnO nanorod arrays by plasma-enhanced CVD for light-activated functional applications			Type	A1 Journal article
Year	2010	Publication	ChemPhysChem : a European journal of chemical physics and physical chemistry	Abbreviated Journal	Chemphyschem
Volume	11	Issue	11	Pages	2337-2340
Keywords	A1 Journal article; Electron microscopy for materials research (EMAT)
Abstract	Switch of the surface properties: Supported ZnO nanorod arrays with tailored roughness and aspect ratios are successfully synthesized by plasma-enhanced chemical vapor deposition. Such nanostructures exhibit significant superhydrophilic and photocatalytic properties tunable as a function of their morphological organization (see picture). This renders them promising building blocks for the fabrication of stimuli-responsive materials.
Address
Corporate Author				Thesis
Publisher		Place of Publication	Weinheim	Editor
Language		Wos	000281061500008	Publication Date	2010-06-16
Series Editor		Series Title		Abbreviated Series Title
Series Volume		Series Issue		Edition
ISSN	1439-4235;1439-7641;	ISBN		Additional Links	UA library record; WoS full record; WoS citing articles
Impact Factor	3.075	Times cited	38	Open Access
Notes	Esteem 026019			Approved	Most recent IF: 3.075; 2010 IF: 3.340
Call Number	UA @ lucian @ c:irua:84594			Serial	3935
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Author	Cao, S.; Somsen, C.; Croitoru, M.; Schryvers, D.; Eggeler, G.
Title	Focused ion beam/scanning electron microscopy tomography and conventional transmission electron microscopy assessment of Ni₄Ti₃ morphology in compression-aged Ni-rich Ni-Ti single crystals			Type	A1 Journal article
Year	2010	Publication	Scripta materialia	Abbreviated Journal	Scripta Mater
Volume	62	Issue	6	Pages	399-402
Keywords	A1 Journal article; Electron microscopy for materials research (EMAT); Condensed Matter Theory (CMT)
Abstract	The size, morphology and configuration of Ni4Ti3 precipitates in a single-crystal NiTi alloy have been investigated by two-dimensional transmission electron microscopy-based image analysis and three-dimensional reconstruction from slice-and-view images obtained in a focused ion beam/scanning electron microscopy (FIB/SEM) dual-beam system. Average distances between the precipitates measured along the compression direction correlate well between both techniques, while particle shape and configuration data is best obtained from FIB/SEM. Precipitates form pockets of B2 of 0.54 ìm in the compression direction and 1 ìm perpendicular to the compression direction.
Address
Corporate Author				Thesis
Publisher		Place of Publication	Oxford	Editor
Language		Wos	000275072700020	Publication Date	2009-12-04
Series Editor		Series Title		Abbreviated Series Title
Series Volume		Series Issue		Edition
ISSN	1359-6462;	ISBN		Additional Links	UA library record; WoS full record; WoS citing articles
Impact Factor	3.747	Times cited	16	Open Access
Notes	Fwo			Approved	Most recent IF: 3.747; 2010 IF: 2.820
Call Number	UA @ lucian @ c:irua:79817			Serial	1246
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Author	Dixit, H.; Saniz, R.; Lamoen, D.; Partoens, B.
Title	The quasiparticle band structure of zincblende and rocksalt ZnO			Type	A1 Journal article
Year	2010	Publication	Journal of physics : condensed matter	Abbreviated Journal	J Phys-Condens Mat
Volume	22	Issue	12	Pages	125505,1-125505,7
Keywords	A1 Journal article; Electron microscopy for materials research (EMAT); Condensed Matter Theory (CMT)
Abstract	We present the quasiparticle band structure of ZnO in its zincblende (ZB) and rocksalt (RS) phases at the Γ point, calculated within the GW approximation. The effect of the pd hybridization on the quasiparticle corrections to the band gap is discussed. We compare three systems, ZB-ZnO which shows strong pd hybridization and has a direct band gap, RS-ZnO which is also hybridized but includes inversion symmetry and therefore has an indirect band gap, and ZB-ZnS which shows a weaker hybridization due to a change of the chemical species from oxygen to sulfur. The quasiparticle corrections are calculated with different numbers of valence electrons in the Zn pseudopotential. We find that the Zn20 + pseudopotential is essential for the adequate treatment of the exchange interaction in the self-energy. The calculated GW band gaps are 2.47 eV and 4.27 eV respectively, for the ZB and RS phases. The ZB-ZnO band gap is underestimated compared to the experimental value of 3.27 by ~ 0.8 eV. The RS-ZnO band gap compares well with the experimental value of 4.5 eV. The underestimation for ZB-ZnO is correlated with the strong pd hybridization. The GW band gap for ZnS is 3.57 eV, compared to the experimental value of 3.8 eV.
Address
Corporate Author				Thesis
Publisher		Place of Publication	London	Editor
Language		Wos	000275496600010	Publication Date	2010-03-13
Series Editor		Series Title		Abbreviated Series Title
Series Volume		Series Issue		Edition
ISSN	0953-8984;1361-648X;	ISBN		Additional Links	UA library record; WoS full record; WoS citing articles
Impact Factor	2.649	Times cited	53	Open Access
Notes	Iwt; Fwo; Bof-Nio			Approved	Most recent IF: 2.649; 2010 IF: 2.332
Call Number	UA @ lucian @ c:irua:81531			Serial	2802
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Author	Saniz, R.; Dixit, H.; Lamoen, D.; Partoens, B.
Title	Quasiparticle energies and uniaxial pressure effects on the properties of SnO₂			Type	A1 Journal article
Year	2010	Publication	Applied physics letters	Abbreviated Journal	Appl Phys Lett
Volume	97	Issue		Pages	261901-261901,3
Keywords	A1 Journal article; Electron microscopy for materials research (EMAT); Condensed Matter Theory (CMT)
Abstract	We calculate the quasiparticle energy spectrum of SnO2 within the GW approximation, properly taking into account the contribution of core levels to the energy corrections. The calculated fundamental gap is of 3.85 eV. We propose that the difference with respect to the experimental optical gap (3.6 eV) is due to excitonic effects in the latter. We further consider the effect applied on uniaxial pressure along the c-axis. Compared to GW, the effect of pressure on the quasiparticle energies and band gap is underestimated by the local-density approximation. The quasiparticle effective masses, however, appear to be well described by the latter.
Address
Corporate Author				Thesis
Publisher	American Institute of Physics	Place of Publication	New York, N.Y.	Editor
Language		Wos	000285768100015	Publication Date	2010-12-28
Series Editor		Series Title		Abbreviated Series Title
Series Volume		Series Issue		Edition
ISSN	0003-6951;	ISBN		Additional Links	UA library record; WoS full record; WoS citing articles
Impact Factor	3.411	Times cited	23	Open Access
Notes	Iwt; Fwo; Bof-Noi			Approved	Most recent IF: 3.411; 2010 IF: 3.841
Call Number	UA @ lucian @ c:irua:85759			Serial	2803
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Author	Zhang, L.; Turner, S.; Brosens, F.; Verbeeck, J.
Title	Model-based determination of dielectric function by STEM low-loss EELS			Type	A1 Journal article
Year	2010	Publication	Physical review : B : condensed matter and materials physics	Abbreviated Journal	Phys Rev B
Volume	81	Issue	3	Pages	035102
Keywords	A1 Journal article; Electron microscopy for materials research (EMAT); Theory of quantum systems and complex systems
Abstract	Dielectric properties of materials are crucial in describing the electromagnetic response of materials. As devices are becoming considerably smaller than the optical wavelength, the conventional measuring methods based on optical response are limited by their spatial resolution. Electron energy loss spectroscopy performed in a scanning transmission electron microscope is a good alternative to obtain the dielectric properties with excellent spatial resolution. Due to the overlap of diffraction discs in scanning transmission electron microscopy, it is difficult to apply conventional experimental settings to suppress retardation losses. In this contribution, a relativistic dielectric model for the loss function is presented which is used in a model based optimization scheme to estimate the complex dielectric function of a material. The method is applied to experiments on bulk diamond and SrTiO3 and shows a good agreement with optical reference data when retardation effects are included. Application of this technique to nanoparticles is possible but several theoretical assumptions made in the model of the loss function are violated and interpretation becomes problematic.
Address
Corporate Author				Thesis
Publisher		Place of Publication	Lancaster, Pa	Editor
Language		Wos	000274002300027	Publication Date	2010-01-08
Series Editor		Series Title		Abbreviated Series Title
Series Volume		Series Issue		Edition
ISSN	1098-0121;1550-235X;	ISBN		Additional Links	UA library record; WoS full record; WoS citing articles
Impact Factor	3.836	Times cited	9	Open Access
Notes	Esteem – 026019; Fwo			Approved	Most recent IF: 3.836; 2010 IF: 3.774
Call Number	UA @ lucian @ c:irua:81258UA @ admin @ c:irua:81258			Serial	2098
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Author	Turner, S.; Tavernier, S.M.F.; Huyberechts, G.; Bals, S.; Batenburg, K.J.; Van Tendeloo, G.
Title	Assisted spray pyrolysis production and characterisation of ZnO nanoparticles with narrow size distribution			Type	A1 Journal article
Year	2010	Publication	Journal of nanoparticle research	Abbreviated Journal	J Nanopart Res
Volume	12	Issue	2	Pages	615-622
Keywords	A1 Journal article; Electron microscopy for materials research (EMAT); Vision lab
Abstract	Nano-sized ZnO particles with a narrow size distribution and high crystallinity were prepared from aqueous solutions with high concentrations of Zn2+ containing salts and citric acid in a conventional spray pyrolysis setup. Structure, morphology and size of the produced material were compared to ZnO material produced by simple spray pyrolysis of zinc nitrates in the same experimental setup. Using transmission electron microscopy and electron tomography it has been shown that citric acid-assisted spray pyrolysed material is made up of micron sized secondary particles comprising a shell of lightly agglomerated, monocrystalline primary ZnO nanoparticles with sizes in the 2030 nm range, separable by a simple ultrasonic treatment step.
Address
Corporate Author				Thesis
Publisher		Place of Publication	S.l.	Editor
Language		Wos	000275318700025	Publication Date	2009-04-20
Series Editor		Series Title		Abbreviated Series Title
Series Volume		Series Issue		Edition
ISSN	1388-0764;1572-896X;	ISBN		Additional Links	UA library record; WoS full record; WoS citing articles
Impact Factor	2.02	Times cited	27	Open Access
Notes	Esteem 026019			Approved	Most recent IF: 2.02; 2010 IF: 3.253
Call Number	UA @ lucian @ c:irua:81771			Serial	156
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Author	Wang, A.; Chen, F.R.; Van Aert, S.; van Dyck, D.
Title	Direct structure inversion from exit waves: part 1: theory and simulations			Type	A1 Journal article
Year	2010	Publication	Ultramicroscopy	Abbreviated Journal	Ultramicroscopy
Volume	110	Issue	5	Pages	527-534
Keywords	A1 Journal article; Electron microscopy for materials research (EMAT); Vision lab
Abstract	In order to interpret the amplitude and phase of the exit wave in terms of mass and position of the atoms, one has to invert the dynamic scattering of the electrons in the object so as to obtain a starting structure which can then be used as a seed for further quantitative structure refinement. This is especially challenging in case of a zone axis condition when the interaction of the electrons with the atom column is very strong. Based on the channelling theory we will show that the channelling map not only yields a circle on the Argand plot but also a circular defocus curve for every column. The former gives the number of atoms in each column, while the latter provides the defocus value for each column, which reveals the surface roughness at the exit plane with single atom sensitivity.
Address
Corporate Author				Thesis
Publisher		Place of Publication	Amsterdam	Editor
Language		Wos	000279065700019	Publication Date	2009-12-12
Series Editor		Series Title		Abbreviated Series Title
Series Volume		Series Issue		Edition
ISSN	0304-3991;	ISBN		Additional Links	UA library record; WoS full record; WoS citing articles
Impact Factor	2.843	Times cited	25	Open Access
Notes	Fwo			Approved	Most recent IF: 2.843; 2010 IF: 2.063
Call Number	UA @ lucian @ c:irua:83691			Serial	723
Permanent link to this record



Author	Van Aert, S.; Chen, J.H.; van Dyck, D.
Title	Linear versus non-linear structural information limit in high-resolution transmission electron microscopy			Type	A1 Journal article
Year	2010	Publication	Ultramicroscopy	Abbreviated Journal	Ultramicroscopy
Volume	110	Issue	11	Pages	1404-1410
Keywords	A1 Journal article; Electron microscopy for materials research (EMAT); Vision lab
Abstract	A widely used performance criterion in high-resolution transmission electron microscopy (HRTEM) is the information limit. It corresponds to the inverse of the maximum spatial object frequency that is linearly transmitted with sufficient intensity from the exit plane of the object to the image plane and is limited due to partial temporal coherence. In practice, the information limit is often measured from a diffractogram or from Young's fringes assuming a weak phase object scattering beyond the inverse of the information limit. However, for an aberration corrected electron microscope, with an information limit in the sub-angstrom range, weak phase objects are no longer applicable since they do not scatter sufficiently in this range. Therefore, one relies on more strongly scattering objects such as crystals of heavy atoms observed along a low index zone axis. In that case, dynamical scattering becomes important such that the non-linear and linear interaction may be equally important. The non-linear interaction may then set the experimental cut-off frequency observed in a diffractogram. The goal of this paper is to quantify both the linear and the non-linear information transfer in terms of closed form analytical expressions. Whereas the cut-off frequency set by the linear transfer can be directly related with the attainable resolution, information from the non-linear transfer can only be extracted using quantitative, model-based methods. In contrast to the historic definition of the information limit depending on microscope parameters only, the expressions derived in this paper explicitly incorporate their dependence on the structure parameters as well. In order to emphasize this dependence and to distinguish from the usual information limit, the expressions derived for the inverse cut-off frequencies will be referred to as the linear and non-linear structural information limit. The present findings confirm the well-known result that partial temporal coherence has different effects on the transfer of the linear and non-linear terms, such that the non-linear imaging contributions are damped less than the linear imaging contributions at high spatial frequencies. This will be important when coherent aberrations such as spherical aberration and defocus are reduced.
Address
Corporate Author				Thesis
Publisher		Place of Publication	Amsterdam	Editor
Language		Wos	000282562100008	Publication Date	2010-07-15
Series Editor		Series Title		Abbreviated Series Title
Series Volume		Series Issue		Edition
ISSN	0304-3991;	ISBN		Additional Links	UA library record; WoS full record; WoS citing articles
Impact Factor	2.843	Times cited	6	Open Access
Notes	Fwo			Approved	Most recent IF: 2.843; 2010 IF: 2.063
Call Number	UA @ lucian @ c:irua:83689			Serial	1821
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Author	Biermans, E.; Molina, L.; Batenburg, K.J.; Bals, S.; Van Tendeloo, G.
Title	Measuring porosity at the nanoscale by quantitative electron tomography			Type	A1 Journal article
Year	2010	Publication	Nano letters	Abbreviated Journal	Nano Lett
Volume	10	Issue	12	Pages	5014-5019
Keywords	A1 Journal article; Electron microscopy for materials research (EMAT); Vision lab
Abstract	Quantitative electron tomography is proposed to characterize porous materials at a nanoscale. To achieve reliable three-dimensional (3D) quantitative information, the influence of missing wedge artifacts and segmentation methods is investigated. We are presenting the Discrete Algebraic Reconstruction Algorithm as the most adequate tomography method to measure porosity at the nanoscale. It provides accurate 3D quantitative information, regardless the presence of a missing wedge. As an example, we applied our approach to nanovoids in La2Zr2O7 thin films.
Address
Corporate Author				Thesis
Publisher		Place of Publication	Washington	Editor
Language		Wos	000284990900040	Publication Date	2010-11-22
Series Editor		Series Title		Abbreviated Series Title
Series Volume		Series Issue		Edition
ISSN	1530-6984;1530-6992;	ISBN		Additional Links	UA library record; WoS full record; WoS citing articles
Impact Factor	12.712	Times cited	79	Open Access
Notes	Esteem 026019			Approved	Most recent IF: 12.712; 2010 IF: 12.219
Call Number	UA @ lucian @ c:irua:87658			Serial	1967
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Author	van den Broek, W.; Van Aert, S.; van Dyck, D.
Title	A model based reconstruction technique for depth sectioning with scanning transmission electron microscopy			Type	A1 Journal article
Year	2010	Publication	Ultramicroscopy	Abbreviated Journal	Ultramicroscopy
Volume	110	Issue	5	Pages	548-554
Keywords	A1 Journal article; Electron microscopy for materials research (EMAT); Vision lab
Abstract	Depth sectioning in high angular annular dark field scanning transmission electron microscopy is considered a candidate for three-dimensional characterization on the atomic scale. However at present the depth resolution is still far from the atomic level, due to strong limitations in the opening angle of the beam. In this paper we introduce a new, parameter based tomographic reconstruction algorithm that allows to make maximal use of the prior knowledge about the constituent atom types and the microscope settings, so as to retrieve the atomic positions and push the resolution to the atomic level in all three dimensions.
Address
Corporate Author				Thesis
Publisher		Place of Publication	Amsterdam	Editor
Language		Wos	000279065700022	Publication Date	2009-09-21
Series Editor		Series Title		Abbreviated Series Title
Series Volume		Series Issue		Edition
ISSN	0304-3991;	ISBN		Additional Links	UA library record; WoS full record; WoS citing articles
Impact Factor	2.843	Times cited	16	Open Access
Notes	Fwo			Approved	Most recent IF: 2.843; 2010 IF: 2.063
Call Number	UA @ lucian @ c:irua:83690			Serial	2104
Permanent link to this record



Author	Leroux, F.; Gysemans, M.; Bals, S.; Batenburg, K.J.; Snauwaert, J.; Verbiest, T.; van Haesendonck, C.; Van Tendeloo, G.
Title	Three-dimensional characterization of helical silver nanochains mediated by protein assemblies			Type	A1 Journal article
Year	2010	Publication	Advanced materials	Abbreviated Journal	Adv Mater
Volume	22	Issue	19	Pages	2193-2197
Keywords	A1 Journal article; Electron microscopy for materials research (EMAT); Vision lab
Abstract	Characterization methods for the structural investigation of biotemplates for nanodevices remain widely unexplored, despite the fact that biotemplating methods for nanodevice fabrication are becoming more widespread. In this study several techniques are used to characterize the morphology and 3D distribution of silver nanoparticles deposited on insulin fibrils.
Address
Corporate Author				Thesis
Publisher		Place of Publication	Weinheim	Editor
Language		Wos	000278601400016	Publication Date	2010-03-11
Series Editor		Series Title		Abbreviated Series Title
Series Volume		Series Issue		Edition
ISSN	0935-9648;1521-4095;	ISBN		Additional Links	UA library record; WoS full record; WoS citing articles
Impact Factor	19.791	Times cited	51	Open Access
Notes	Esteem 026019; Fwo			Approved	Most recent IF: 19.791; 2010 IF: NA
Call Number	UA @ lucian @ c:irua:83296			Serial	3645
Permanent link to this record



Author	Sels, D.; Sorée, B.; Groeseneken, G.
Title	2-D rotational invariant multi sub band Schrödinger-Poisson solver to model nanowire transistors			Type	A1 Journal article
Year	2010	Publication		Abbreviated Journal
Volume		Issue		Pages	85-88
Keywords	A1 Journal article; Electron Microscopy for Materials Science (EMAT);
Abstract
Address
Corporate Author				Thesis
Publisher	Pisa University Press	Place of Publication	Pisa	Editor
Language		Wos		Publication Date	0000-00-00
Series Editor		Series Title		Abbreviated Series Title	14th International Workshop on Computational Electronics
Series Volume		Series Issue		Edition
ISSN	978-1-4244-9381-4	ISBN		Additional Links	UA library record
Impact Factor		Times cited		Open Access
Notes				Approved	Most recent IF: NA
Call Number	UA @ lucian @ c:irua:91699			Serial	6
Permanent link to this record



Author	O'Regan, T.P.; Hurley, P.K.; Sorée, B.; Fischetti, M.V.
Title	Modeling the capacitance-voltage response of In_0.53Ga_0.47As metal-oxide-semiconductor structures : charge quantization and nonparabolic corrections			Type	A1 Journal article
Year	2010	Publication	Applied Physics Letters	Abbreviated Journal	Appl Phys Lett
Volume	96	Issue	21	Pages	213514,1-213514,3
Keywords	A1 Journal article; Electron Microscopy for Materials Science (EMAT);
Abstract	The capacitance-voltage (C-V) characteristic is calculated for p-type In<sub>0.53</sub>Ga<sub>0.47</sub>As metal-oxide-semiconductor (MOS) structures based on a self-consistent PoissonSchrödinger solution. For strong inversion, charge quantization leads to occupation of the satellite valleys which appears as a sharp increase in the capacitance toward the oxide capacitance. The results indicate that the charge quantization, even in the absence of interface defects (D<sub>it</sub>), is a contributing factor to the experimental observation of an almost symmetric C-V response for In<sub>0.53</sub>Ga<sub>0.47</sub>As MOS structures. In addition, nonparabolic corrections are shown to enhance the depopulation of the Γ valley, shifting the capacitance increase to lower inversion charge densities.
Address
Corporate Author				Thesis
Publisher	American Institute of Physics	Place of Publication	New York, N.Y.	Editor
Language		Wos	000278183200090	Publication Date	2010-05-28
Series Editor		Series Title		Abbreviated Series Title
Series Volume		Series Issue		Edition
ISSN	0003-6951;	ISBN		Additional Links	UA library record; WoS full record; WoS citing articles
Impact Factor	3.411	Times cited	26	Open Access
Notes				Approved	Most recent IF: 3.411; 2010 IF: 3.841
Call Number	UA @ lucian @ c:irua:89509			Serial	2143
Permanent link to this record



Author	Verhulst, A.; Sorée, B.; Leonelli, D.; Vandenberghe, W.G.; Groeseneken, G.
Title	Modeling the single-gate, double-gate, and gate-all-around tunnel field-effect transistor			Type	A1 Journal article
Year	2010	Publication	Journal Of Applied Physics	Abbreviated Journal	J Appl Phys
Volume	107	Issue	2	Pages	024518,1-024518,8
Keywords	A1 Journal article; Electron Microscopy for Materials Science (EMAT);
Abstract	Tunnel field-effect transistors (TFETs) are potential successors of metal-oxide-semiconductor FETs because scaling the supply voltage below 1 V is possible due to the absence of a subthreshold-swing limit of 60 mV/decade. The modeling of the TFET performance, however, is still preliminary. We have developed models allowing a direct comparison between the single-gate, double-gate, and gate-all-around configuration at high drain voltage, when the drain-voltage dependence is negligible, and we provide improved insight in the TFET physics. The dependence of the tunnel current on device parameters is analyzed, in particular, the scaling with gate-dielectric thickness, channel thickness, and dielectric constants of gate dielectric and channel material. We show that scaling the gate-dielectric thickness improves the TFET performance more than scaling the channel thickness and that improvements are often overestimated. There is qualitative agreement between our model and our experimental data.
Address
Corporate Author				Thesis
Publisher	American Institute of Physics	Place of Publication	New York, N.Y.	Editor
Language		Wos	000274180600122	Publication Date	2010-01-28
Series Editor		Series Title		Abbreviated Series Title
Series Volume		Series Issue		Edition
ISSN	0021-8979;	ISBN		Additional Links	UA library record; WoS full record; WoS citing articles
Impact Factor	2.068	Times cited	150	Open Access
Notes				Approved	Most recent IF: 2.068; 2010 IF: 2.079
Call Number	UA @ lucian @ c:irua:89507			Serial	2146
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