“Structure and microstructure of nanoscale mesoporous silica spheres”. Lebedev OI, Van Tendeloo G, Collart O, Cool P, Vansant EF, Solid state sciences 6, 489 (2004). http://doi.org/10.1016/j.solidstatesciences.2004.01.013
Keywords: A1 Journal article; Electron microscopy for materials research (EMAT); Laboratory of adsorption and catalysis (LADCA)
Impact Factor: 1.811
Times cited: 42
DOI: 10.1016/j.solidstatesciences.2004.01.013
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“Structure and properties of (Sr,Ca)CuO2-BaCuO2 superlattices grown by pulsed laser interval deposition”. Koster G, Verbist K, Rijnders G, Rogalla H, Van Tendeloo G, Blank DHA, Physica: C : superconductivity 353, 167 (2001). http://doi.org/10.1016/S0921-4534(00)01763-9
Abstract: We report on the preparation of CuBa(2)(Sr(x)Ca(1-x))(n)Cu(n-1)O(y) compounds by fabrication of (Ba,Sr,Ca)CuO(2) superlattices with pulsed laser deposition (PLD). A technique called interval deposition is used to suppress multi-level or island growth resulting in high-quality superlattice structures. Both, the applicability of PLD to atomic engineering as well as the fabrication of artificial superconductors is demonstrated. The (Sr,Ca)CuO(2)-BaCuO(2) superlattices are characterized by X-ray diffraction, high-resolution electron microscopy (HREM) and selected area electron diffraction. The superlattice period has been deduced from electron diffraction patterns and XRD measurements. For Sr containing films, the best growth behavior is observed and films with the highest degree of crystallinity are obtained, whereas superconductivity is only found in less crystalline, Ca containing films. Under some deposition conditions and depending on the amount of Ba containing layers in the superlattice, it was observed that the BaCuO(2) material is converted to Ba(2)CuO(4-delta). Image simulations to interpret the HREM contrast are performed. (C) 2001 Elsevier Science B.V. All rights reserved.
Keywords: A1 Journal article; Electron microscopy for materials research (EMAT)
Impact Factor: 1.404
Times cited: 8
DOI: 10.1016/S0921-4534(00)01763-9
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“The structure, energetics, and harmonic vibrations of B3N”. Slanina Z, Martin JML, François JP, Gijbels R, Chemical physics letters 201, 54 (1993). http://doi.org/10.1016/0009-2614(93)85033-K
Keywords: A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT)
Impact Factor: 1.897
Times cited: 20
DOI: 10.1016/0009-2614(93)85033-K
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“Structure, microstructure and transport properties of B-doped YBCO system”. ben Azzouz F, Zouaoui M, Mani KD, Annabi M, Van Tendeloo G, ben Salem M, Physica: C : superconductivity 442, 13 (2006). http://doi.org/10.1016/j.physc.2006.03.135
Keywords: A1 Journal article; Electron microscopy for materials research (EMAT)
Impact Factor: 1.404
Times cited: 14
DOI: 10.1016/j.physc.2006.03.135
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“The structure of different phases of pure C70 crystals”. Verheijen MA, Meekes H, Meijer G, Bennema P, de Boer JL, van Smaalen S, Van Tendeloo G, Amelinckx S, Muto S, van Landuyt J, Chemical physics 166, 287 (1992). http://doi.org/10.1016/0301-0104(92)87026-6
Keywords: A1 Journal article; Electron microscopy for materials research (EMAT)
Impact Factor: 1.652
Times cited: 168
DOI: 10.1016/0301-0104(92)87026-6
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“Structures and phase transitions in C60 and C70 fullerites”. Van Tendeloo G, Amelinckx S, Muto S, Verheijen MA, van Loosdrecht PHM, Meijer G, Ultramicroscopy 51, 168 (1993). http://doi.org/10.1016/0304-3991(93)90145-N
Keywords: A1 Journal article; Electron microscopy for materials research (EMAT)
Impact Factor: 2.436
Times cited: 17
DOI: 10.1016/0304-3991(93)90145-N
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“Structures and thermochemistry of B3N3 and B4N4”. Martin JML, El-Yazal J, François JP, Gijbels R, Chemical physics letters 232, 289 (1995). http://doi.org/10.1016/0009-2614(94)01336-T
Keywords: A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT)
Impact Factor: 1.897
Times cited: 35
DOI: 10.1016/0009-2614(94)01336-T
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“The study of carbon nanotubes produced by catalytic method”. Ivanov V, Nagy JB, Lambin P, Lucas A, Zhang XB, Zhang XF, Bernaerts D, Van Tendeloo G, Amelinckx S, van Landuyt J, Chemical physics letters 223, 329 (1994)
Keywords: A1 Journal article; Electron microscopy for materials research (EMAT)
Impact Factor: 1.897
Times cited: 405
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“Study of oxynitrides with dual beam TOF-SIMS”. de Witte H, Conard T, Vandervorst W, Gijbels R, , 611 (2000)
Keywords: P3 Proceeding; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT)
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“Study of the interaction between copper and carbon nanotubes”. Bittencourt C, Ke X, Van Tendeloo G, Thiess S, Drube W, Ghijsen J, Ewels CP, Chemical physics letters 535, 80 (2012). http://doi.org/10.1016/j.cplett.2012.03.045
Abstract: Copper deposited by thermal evaporation onto pristine and oxygen plasma treated carbon nanotubes (CNTs) diffuse over the CNT surface, coalescing and forming crystalline islands. The nucleation sites of the islands are preferentially defects, and more homogeneous island dispersion was observed at the CNT oxygen functionalized surface. The presence of weakly bound oxygen atoms at the CNT surface induces the formation of CuO bonds at the Cu/CNT interface, as described through density functional calculations. Exposure to air allows further oxidation to facetted crystalline Cu2O. Oxygen plasma pre-treatment represents a promising route for homogenous disperse Cu2O nanoparticle decoration of CNTs.
Keywords: A1 Journal article; Electron microscopy for materials research (EMAT)
Impact Factor: 1.815
Times cited: 27
DOI: 10.1016/j.cplett.2012.03.045
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“Study of the nucleation and growth of TiO2 and ZnO thin films by means of molecular dynamics simulations”. Baguer N, Georgieva V, Calderin L, Todorov IT, van Gils S, Bogaerts A, Journal of crystal growth 311, 4034 (2009). http://doi.org/10.1016/j.jcrysgro.2009.06.034
Abstract: The nucleation and growth of titanium dioxide (TiO2) and zinc oxide (ZnO) thin films on Fe2O3 (hematite), Al2O3 (á-alumina) and SiO2 (á-quartz) are studied by molecular dynamics simulations. The results show the formation of a strong interface region between the substrate and the film in the six systems studied here. A combination of polycrystalline and amorphous phases are observed in the TiO2 films grown on the three substrates. ZnO deposition on the Fe2O3 and Al2O3 crystals yields a monocrystalline film growth. The ZnO film deposited on the SiO2 crystal exhibits less crystallinity. The simulation results are compared with experimental results available in the literature.
Keywords: A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT)
Impact Factor: 1.751
Times cited: 23
DOI: 10.1016/j.jcrysgro.2009.06.034
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“Sub-nanometer free electrons with topological charge”. Schattschneider P, Stöger-Pollach M, Löffler S, Steiger-Thirsfeld A, Hell J, Verbeeck J, Ultramicroscopy 115, 21 (2012). http://doi.org/10.1016/j.ultramic.2012.01.010
Abstract: The holographic mask technique is used to create freely moving electrons with quantized angular momentum. With electron optical elements they can be focused to vortices with diameters below the nanometer range. The understanding of these vortex beams is important for many applications. Here, we produce electron vortex beams and compare them to a theory of electrons with topological charge. The experimental results show excellent agreement with simulations. As an immediate application, fundamental experimental parameters like spherical aberration and partial coherence are determined. (C) 2012 Elsevier B.V. All rights reserved.
Keywords: A1 Journal article; Electron microscopy for materials research (EMAT)
Impact Factor: 2.843
Times cited: 24
DOI: 10.1016/j.ultramic.2012.01.010
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“The superconducting state in square mesoscopic samples with two and four antidots”. Berdiyorov GR, Baelus BJ, Milošević, MV, Peeters FM, Physica: C : superconductivity 404, 56 (2004). http://doi.org/10.1016/j.physc.2003.09.111
Keywords: A1 Journal article; Condensed Matter Theory (CMT)
Impact Factor: 1.404
Times cited: 3
DOI: 10.1016/j.physc.2003.09.111
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“Superconductivity up to 110K in the 1212-Hg based cuprate Nd1-xCaxBa2Hg1-xCu2+xO6+y”. Maignan A, Michel C, Van Tendeloo G, Hervieu M, Raveau B, Physica: C : superconductivity 216, 1 (1993)
Keywords: A1 Journal article; Electron microscopy for materials research (EMAT)
Impact Factor: 0.942
Times cited: 32
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“The superlattices in high Tc superconducting cuprates”. Milat O, Krekels T, Van Tendeloo G, Amelinckx S, Physica: C : superconductivity 235/240, 729 (1994). http://doi.org/10.1016/0921-4534(94)91589-X
Keywords: A1 Journal article; Electron microscopy for materials research (EMAT)
Impact Factor: 0.942
DOI: 10.1016/0921-4534(94)91589-X
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“Suppression of superconductivity in Hg-1223 and Hg-1234 by partial replacement of Hg by carbon”. Kopnin EM, Antipov EV, Capponi JJ, Bordet P, Chaillout C, de Brion S, Marezio M, Bobylev AP, Van Tendeloo G, Physica: C : superconductivity 243, 222 (1995). http://doi.org/10.1016/0921-4534(95)00010-0
Keywords: A1 Journal article; Electron microscopy for materials research (EMAT)
Impact Factor: 0.942
Times cited: 22
DOI: 10.1016/0921-4534(95)00010-0
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“Synthesis and characterization of nanocrystal zeolite/mesoporous matrix composite material”. Gagea BC, Liang D, Van Tendeloo G, Martens JA, Jacobs PA, Studies in surface science and catalysis 162, 259 (2006). http://doi.org/10.1016/S0167-2991(06)80915-8
Keywords: P1 Proceeding; Electron microscopy for materials research (EMAT)
Times cited: 8
DOI: 10.1016/S0167-2991(06)80915-8
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“Synthesis and characterization of oxygen-deficient oxides BaCo1-xYxO3-y' x = 0.15, 0.25 and 0.33, with the perovskite structure”. Lomakov MV, Istomin SY, Abakumov AM, Van Tendeloo G, Antipov EV, Solid state ionics 179, 1885 (2008). http://doi.org/10.1016/j.ssi.2008.05.004
Abstract: Oxygen-deficient complex cobalt oxides BaCo1 − xYxO3 − y, = 0.15, 0.25 and 0.33, with a cubic perovskite structure have been synthesized in air at 1100 °C using a citrate route. Cation composition of the compounds was confirmed by energy-dispersed X-ray (EDX) microanalysis while oxygen content was determined by iodometric titration. An electron diffraction (ED) study of the x = 0.25 and 0.33 compositions show the presence of a diffuse intensity, indicating possible short-range ordering of the B cations. It was found that the treatment of BaCo0.75Y0.25O2.55 in a humid atmosphere leads to the absorption of water vapour at the first stage. Oxygen permeation studies of the ceramic membranes of BaCo0.75Y0.25O2.55 and BaCo0.67Y0.33O2.55 with variable thickness showed high oxygen fluxes of 0.170.32 µmol/cm2/s at 950 °C.
Keywords: A1 Journal article; Electron microscopy for materials research (EMAT)
Impact Factor: 2.354
Times cited: 9
DOI: 10.1016/j.ssi.2008.05.004
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“Synthesis and characterization of the new cyclosilicate hydrate (hexamethyleneimine)4.[Si8O16(OH)4].12H2O”. Verlooy PLH, Robeyns K, van Meervelt L, Lebedev OI, Van Tendeloo G, Martens JA, Kirschhock CEA, Microporous and mesoporous materials: zeolites, clays, carbons and related materials 130, 14 (2010). http://doi.org/10.1016/j.micromeso.2009.10.006
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.
Keywords: A1 Journal article; Electron microscopy for materials research (EMAT)
Impact Factor: 3.615
Times cited: 5
DOI: 10.1016/j.micromeso.2009.10.006
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“Synthesis and investigation of novel Mn-based oxyfluoride Sr2Mn2O5-xF1+x”. Lobanov MV, Abakumov AM, Sidorova AV, Rozova MG, D'yachenko OG, Antipov EV, Hadermann J, Van Tendeloo G, Solid state sciences 4, 19 (2002). http://doi.org/10.1016/S1293-2558(01)01209-2
Keywords: A1 Journal article; Electron microscopy for materials research (EMAT)
Impact Factor: 1.811
Times cited: 21
DOI: 10.1016/S1293-2558(01)01209-2
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“Synthesis and structural investigations on the new Sr1.32Mn0.83Cu0.17O3 compound”. Abakumov AM, Mironov AV, Govorov VA, Lobanov MV, Rozova MG, Antipov EV, Lebedev OI, Van Tendeloo G, Solid state sciences 5, 1117 (2003). http://doi.org/10.1016/S1293-2558(03)00141-9
Keywords: A1 Journal article; Electron microscopy for materials research (EMAT)
Impact Factor: 1.811
Times cited: 8
DOI: 10.1016/S1293-2558(03)00141-9
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“Synthesis and structural mechanisms of the 2201-type ferrites and polytypes: Fe2(Sr2-xAx)FeO6.5-\delta/2 (A = Ba, La, Tl, Pb and Bi)”. Lepoittevin C, Malo S, Van Tendeloo G, Hervieu M, Solid state sciences 11, 595 (2009). http://doi.org/10.1016/j.solidstatesciences.2008.12.005
Abstract: The Fe2(Sr2 − xAx)FeO6.5 − ä/2 systems have been investigated, by doping the iron rich 2201-type parent structure with Ba2+, La3+ and 5d10 post-transition cations. The syntheses have been carried out up to the limit of the 2201-type solid solutions, in order to test the role of the double iron layer Fe2O2.5 − ä/2. The localisation of the charge carriers in these compounds is consistent with their strong antiferro-magnetism. The investigation was then carried out in the transition part of the diagram up to the formation of stable phases. The study of structural mechanisms was carried using high resolution electron microscopy (transmission and scanning transmission), electron diffraction and energy dispersive spectroscopy. Different non-stoichiometry mechanisms are observed, depending on the electronic structure and chemical properties of the doping elements. The specific behavior of the modulated double iron layer is discussed.
Keywords: A1 Journal article; Electron microscopy for materials research (EMAT)
Impact Factor: 1.811
Times cited: 3
DOI: 10.1016/j.solidstatesciences.2008.12.005
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“Synthesis and structure of Ln4Re6-xO19 (Ln=Ce, Pr, Nd) complex oxides”. Bramnik KG, Abakumov AM, Shpanchenko RV, Antipov EV, Van Tendeloo G, Journal of alloys and compounds 278, 98 (1998). http://doi.org/10.1016/S0925-8388(98)00252-7
Keywords: A1 Journal article; Electron microscopy for materials research (EMAT)
Impact Factor: 3.133
Times cited: 8
DOI: 10.1016/S0925-8388(98)00252-7
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“Synthesis and structure of Sr2MnGaO5+\delta brownmillerites with variable oxygen content”. Abakumov AM, Rozova MG, Alekseeva AM, Kovba ML, Antipov EV, Lebedev OI, Van Tendeloo G, Solid state sciences 5, 871 (2003). http://doi.org/10.1016/S1293-2558(03)00112-2
Keywords: A1 Journal article; Electron microscopy for materials research (EMAT)
Impact Factor: 1.811
Times cited: 12
DOI: 10.1016/S1293-2558(03)00112-2
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“Systematic errors in 14-MeV neutron activation analysis for oxygen : part 1 : neutron and γ-ray attenuation effects”. Vandecasteele C, van Grieken R, Gijbels R, Speecke A, Analytica chimica acta 64, 187 (1973). http://doi.org/10.1016/S0003-2670(01)82436-3
Abstract: A detailed account is given of neutron and γ-ray attenuation effects in 14-MeV neutron activation analysis of oxygen. Appropriate neutron cross-section values have been determined in two different ways and compared with literature values. It appears that the attenuation process is best described in terms of nonelastic scattering cross-sections. It is also shown that the narrow beam total γ-ray attenuation coefficients at 6 MeV, given in the literature are suitable for correction purposes if 16N γ-rays are counted with a window of 4.56.5 MeV. Attention was paid to the contribution of β-rays when the 16N activity is counted in this energy interval with a NaI(Tl) detector.
Keywords: A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT); AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
Impact Factor: 4.513
Times cited: 11
DOI: 10.1016/S0003-2670(01)82436-3
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“Systematic errors in 14-MeV neutron activation analysis for oxygen : part 2 : a general standardization method for the determination of oxygen”. Vandecasteele C, van Grieken R, Gijbels R, Speecke A, Analytica chimica acta 65, 1 (1973). http://doi.org/10.1016/S0003-2670(01)80158-6
Abstract: A general standardization method is described for the determination of oxygen in solid samples via the 16O(n,p)16N reaction. Two systems of flux monitoring are considered: the sample versus standard comparator method and BF3 monitoring. The average flux in sample and standard, fast neutron shielding, fast neutron scattering, absorption of fast neutrons, absorption of 16N γ-rays and counting efficiency of sample and standard are considered. The influence of the target diameter on the obtained correction factors has also been studied. Total achievable accuracy is believed to be about 1%.
Keywords: A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT); AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
Impact Factor: 4.513
Times cited: 12
DOI: 10.1016/S0003-2670(01)80158-6
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“Systematic evaluation of thermal and mechanical stability of different commercial and synthetic photocatalysts in relation to their photocatalytic activity”. Ribbens S, Beyers E, Schellens K, Mertens M, Ke X, Bals S, Van Tendeloo G, Meynen V, Cool P, Microporous and mesoporous materials: zeolites, clays, carbons and related materials 156, 62 (2012). http://doi.org/10.1016/j.micromeso.2012.01.036
Abstract: The effect of thermal treatment and mechanical stress on the structural and photocatalytic properties of eight different (synthetic and commercial) photocatalysts has been thoroughly investigated. Different mesoporous Ti-based materials were prepared via surfactant based synthesis routes (e.g. Pluronic 123, CTMABr = Cetyltrimethylammonium bromide) or via template-free synthesis routes (e.g. trititanate nanotubes). Also, the stabilizing effect of the NaOH/NH4OH post-treatment on the templated mesoporous materials and their photocatalytic activity was investigated. Furthermore, the thermal and mechanical properties of commercially available titanium dioxides such as P25 Evonik® and Millenium PC500® were studied. The various photocatalysts were analyzed with N2-sorption, X-ray diffraction (XRD), high resolution transmission electron microscopy (HR-TEM), differential scanning calorimetry (DSC) and thermal gravimetric analysis (TGA) to obtain information concerning the specific surface area, pore volume, crystal structure, morphology, phase transitions, etc. In general, results show that the NaOH post-treatment leads to an increased control of the crystallization process during calcination resulting in a higher thermal stability, but at the same time diminishes the photocatalytic activity. Mesoporous materials in which pre-synthesized nanoparticles are used as titania source have the best mechanical stability whereas the mechanical stability of the nanotubes is the most limited. At increased temperatures and pressures, the tested commercial titanium dioxides lose their superior photocatalytic activity caused by a decreased accessibility of the active sites. The observed changes in adsorption capacities and photocatalytic activities cannot be assigned to one single phenomenon. In this respect, it shows the need to define a general/standard method to compare different photocatalysts. Furthermore, it is shown that the photocatalytic properties do not necessarily deteriorate under thermal stress, but can be improved due to crystallization, even though the initial material is (partially) destroyed. It is shown that the usefulness of a specific type of photocatalyst strongly depends on the application and the temperature/pressure to which it needs to resist.
Keywords: A1 Journal article; Engineering sciences. Technology; Electron microscopy for materials research (EMAT); Laboratory of adsorption and catalysis (LADCA)
Impact Factor: 3.615
Times cited: 8
DOI: 10.1016/j.micromeso.2012.01.036
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“TEM and Raman characterisation of diamond micro- and nanostructures in carbon spherules from upper soils”. Yang ZQ, Verbeeck J, Schryvers D, Tarcea N, Popp J, Rösler W, Diamond and related materials 17, 937 (2008). http://doi.org/10.1016/j.diamond.2008.01.104
Abstract: Carbonaceous spherules of millimeter size diameter and found in the upper soils throughout Europe are investigated by TEM, including SAED, HRTEM and EELS, and Raman spectroscopy. The spherules consist primarily of carbon and have an open cell-like internal structure. Most of the carbon appears in an amorphous state, but different morphologies of nano- and microdiamond particles have also been discovered including flake shapes. The latter observation, together with the original findings of some of these spherules in crater-like structures in the landscape and including severely deformed rocks with some spherules being embedded in the fused crust of excavated rocks, points towards unique conditions of origin for these spherules and particles, possibly of exogenic origin. (C) 2008 Elsevier B.V. All rights reserved.
Keywords: A1 Journal article; Electron microscopy for materials research (EMAT)
Impact Factor: 2.561
Times cited: 26
DOI: 10.1016/j.diamond.2008.01.104
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“TEM of ultra-thin DyBa2Cu3O7-x films deposited on TiO2 terminated SrTiO3”. Bals S, Rijnders G, Blank DHA, Van Tendeloo G, Physica: C : superconductivity 355, 225 (2001). http://doi.org/10.1016/S0921-4534(01)00034-X
Abstract: Using pulsed laser deposition ultra-thin DyBa2Cu3O7-x films were deposited on a single terminated (0 0 1) SrTiOr(3) substrate. The initial growth was studied by high-resolution electron microscopy. Two different types of interface arrangements occur and were determined as: bulk-SrO-TiO2-BaO-CuO-BaO-CuO2-Dy-CuO2-BaO bulk and bulk-SrO-TiO2-BaO-CuO2-Dy-CuO2-BaO-CuO-BaO-bulk This variable growth sequence causes structural shifts, resulting in antiphase boundaries with displacement vector R = [0 0 1/3]. as well as local chemical variations. (C) 2001 Elsevier Science B.V. All rights reserved.
Keywords: A1 Journal article; Electron microscopy for materials research (EMAT)
Impact Factor: 1.404
Times cited: 26
DOI: 10.1016/S0921-4534(01)00034-X
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“TEM sample preparation by FIB for carbon nanotube interconnects”. Ke X, Bals S, Romo Negreira A, Hantschel T, Bender H, Van Tendeloo G, Ultramicroscopy 109, 1353 (2009). http://doi.org/10.1016/j.ultramic.2009.06.011
Abstract: A powerful method to study carbon nanotubes (CNTs) grown in patterned substrates for potential interconnects applications is transmission electron microscopy (TEM). However, high-quality TEM samples are necessary for such a study. Here, TEM specimen preparation by focused ion beam (FIB) has been used to obtain lamellae of patterned samples containing CNTs grown inside contact holes. A dual-cap Pt protection layer and an extensive 5 kV cleaning procedure are applied in order to preserve the CNTs and avoid deterioration during milling. TEM results show that the inner shell structure of the carbon nanotubes has been preserved, which proves that focused ion beam is a useful technique to prepare TEM samples of CNT interconnects.
Keywords: A1 Journal article; Electron microscopy for materials research (EMAT)
Impact Factor: 2.843
Times cited: 21
DOI: 10.1016/j.ultramic.2009.06.011
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