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Author Van Aert, S.; Verbeeck, J.; Erni, R.; Bals, S.; Luysberg, M.; van Dyck, D.; Van Tendeloo, G.
  Title Quantitative atomic resolution mapping using high-angle annular dark field scanning transmission electron microscopy Type A1 Journal article
  Year 2009 Publication Ultramicroscopy Abbreviated Journal Ultramicroscopy
  Volume 109 Issue 10 Pages 1236-1244
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT); Vision lab
  Abstract A model-based method is proposed to relatively quantify the chemical composition of atomic columns using high angle annular dark field (HAADF) scanning transmission electron microscopy (STEM) images. The method is based on a quantification of the total intensity of the scattered electrons for the individual atomic columns using statistical parameter estimation theory. In order to apply this theory, a model is required describing the image contrast of the HAADF STEM images. Therefore, a simple, effective incoherent model has been assumed which takes the probe intensity profile into account. The scattered intensities can then be estimated by fitting this model to an experimental HAADF STEM image. These estimates are used as a performance measure to distinguish between different atomic column types and to identify the nature of unknown columns with good accuracy and precision using statistical hypothesis testing. The reliability of the method is supported by means of simulated HAADF STEM images as well as a combination of experimental images and electron energy-loss spectra. It is experimentally shown that statistically meaningful information on the composition of individual columns can be obtained even if the difference in averaged atomic number Z is only 3. Using this method, quantitative mapping at atomic resolution using HAADF STEM images only has become possible without the need of simultaneously recorded electron energy loss spectra.
  Address
  Corporate Author Thesis
  Publisher Place of Publication (up) Amsterdam Editor
  Language Wos 000270015200004 Publication Date 2009-05-28
  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 166 Open Access
  Notes Fwo; Esteem 026019 Approved Most recent IF: 2.843; 2009 IF: 2.067
  Call Number UA @ lucian @ c:irua:78585UA @ admin @ c:irua:78585 Serial 2748
Permanent link to this record
 

 
Author Martinez, G.T.; Rosenauer, A.; de Backer, A.; Verbeeck, J.; Van Aert, S.
  Title Quantitative composition determination at the atomic level using model-based high-angle annular dark field scanning transmission electron microscopy Type A1 Journal article
  Year 2014 Publication Ultramicroscopy Abbreviated Journal Ultramicroscopy
  Volume 137 Issue Pages 12-19
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
  Abstract High angle annular dark field scanning transmission electron microscopy (HAADF STEM) images provide sample information which is sensitive to the chemical composition. The image intensities indeed scale with the mean atomic number Z. To some extent, chemically different atomic column types can therefore be visually distinguished. However, in order to quantify the atomic column composition with high accuracy and precision, model-based methods are necessary. Therefore, an empirical incoherent parametric imaging model can be used of which the unknown parameters are determined using statistical parameter estimation theory (Van Aert et al., 2009, [1]). In this paper, it will be shown how this method can be combined with frozen lattice multislice simulations in order to evolve from a relative toward an absolute quantification of the composition of single atomic columns with mixed atom types. Furthermore, the validity of the model assumptions are explored and discussed.
  Address
  Corporate Author Thesis
  Publisher Place of Publication (up) Amsterdam Editor
  Language Wos 000331092200003 Publication Date 2013-11-09
  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 74 Open Access
  Notes FWO; FP7; ERC Countatoms; ESTEEM2; esteem2_ta Approved Most recent IF: 2.843; 2014 IF: 2.436
  Call Number UA @ lucian @ c:irua:111579UA @ admin @ c:irua:111579 Serial 2749
Permanent link to this record
 

 
Author Heidari, H.; van den Broek, W.; Bals, S.
  Title Quantitative electron tomography : the effect of the three-dimensional point spread function Type A1 Journal article
  Year 2013 Publication Ultramicroscopy Abbreviated Journal Ultramicroscopy
  Volume 135 Issue Pages 1-5
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
  Abstract The intensity levels in a three-dimensional (3D) reconstruction, obtained by electron tomography, can be influenced by several experimental imperfections. Such artifacts will hamper a quantitative interpretation of the results. In this paper, we will correct for artificial intensity variations by determining the 3D point spread function (PSF) of a tomographic reconstruction based on high angle annular dark field scanning transmission electron microscopy. The large tails of the PSF cause an underestimation of the intensity of smaller particles, which in turn hampers an accurate radius estimate. Here, the error introduced by the PSF is quantified and corrected a posteriori.
  Address
  Corporate Author Thesis
  Publisher Place of Publication (up) Amsterdam Editor
  Language Wos 000326941500001 Publication Date 2013-06-21
  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 6 Open Access
  Notes Esteem2; Sunflower; esteem2_jra4 Approved Most recent IF: 2.843; 2013 IF: 2.745
  Call Number UA @ lucian @ c:irua:111397 Serial 2756
Permanent link to this record
 

 
Author Martinez, G.T.; Jones, L.; de Backer, A.; Béché, A.; Verbeeck, J.; Van Aert, S.; Nellist, P.D.
  Title Quantitative STEM normalisation : the importance of the electron flux Type A1 Journal article
  Year 2015 Publication Ultramicroscopy Abbreviated Journal Ultramicroscopy
  Volume 159 Issue 159 Pages 46-58
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
  Abstract Annular dark-field (ADF) scanning transmission electron microscopy (STEM) has become widely used in quantitative studies based on the opportunity to directly compare experimental and simulated images. This comparison merely requires the experimental data to be normalised and expressed in units of fractional beam-current. However, inhomogeneities in the response of electron detectors can complicate this normalisation. The quantification procedure becomes both experiment and instrument specific, requiring new simulations for the particular response of each instrument's detector, and for every camera-length used. This not only impedes the comparison between different instruments and research groups, but can also be computationally very time consuming. Furthermore, not all image simulation methods allow for the inclusion of an inhomogeneous detector response. In this work, we propose an alternative method for normalising experimental data in order to compare these with simulations that consider a homogeneous detector response. To achieve this, we determine the electron flux distribution reaching the detector by means of a camera-length series or a so-called atomic column cross-section averaged convergent beam electron diffraction (XSACBED) pattern. The result is then used to determine the relative weighting of the detector response. Here we show that the results obtained by this new electron flux weighted (EFW) method are comparable to the currently used method, while considerably simplifying the needed simulation libraries. The proposed method also allows one to obtain a metric that describes the quality of the detector response in comparison with the ideal detector response.
  Address
  Corporate Author Thesis
  Publisher Place of Publication (up) Amsterdam Editor
  Language Wos 000366220000006 Publication Date 2015-08-01
  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 27 Open Access
  Notes 246791 Countatoms; 278510 Vortex; 312483 Esteem2; Fwo G036815; G036915; G037413; G004413; esteem2ta ECASJO; Approved Most recent IF: 2.843; 2015 IF: 2.436
  Call Number c:irua:127293 c:irua:127293UA @ admin @ c:irua:127293 Serial 2762
Permanent link to this record
 

 
Author Schattschneider, P.; Verbeeck, J.; Hamon, A.L.
  Title Real space maps of atomic transitions Type A1 Journal article
  Year 2009 Publication Ultramicroscopy Abbreviated Journal Ultramicroscopy
  Volume 109 Issue 7 Pages 781-787
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
  Abstract Considering the rapid technical development of transmission electron microscopes, we investigate the possibility to map electronic transitions in real space on the atomic scale. To this purpose, we analyse the information carried by the scatterer's initial and final state wave functions and the role of the different atomic transition channels for the inelastic scattering cross section. It is shown that the change in the magnetic quantum number in the transition can be mapped. Two experimental set-ups are proposed, one blocking half the diffraction plane, the other one using a cylinder lens for imaging. Both methods break the conventional circular symmetry in the electron microscope making it possible to detect the handedness of electronic transitions as an asymmetry in the image intensity. This finding is of important for atomic resolution energy-loss magnetic chiral dichroism (EMCD), allowing to obtain the magnetic moments of single atoms.
  Address
  Corporate Author Thesis
  Publisher Place of Publication (up) Amsterdam Editor
  Language Wos 000266787900002 Publication Date 2009-03-01
  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 10 Open Access
  Notes J.V. acknowledges the FWO-Vlaanderen for support (contract no. G.0147.06) and the European Union under the Framework 6 program under a contract for an Integrated Infrastructure Initiative. Reference 026019 ESTEEM. Approved Most recent IF: 2.843; 2009 IF: 2.067
  Call Number UA @ lucian @ c:irua:77360UA @ admin @ c:irua:77360 Serial 2829
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Author Schattschneider, P.; Ennen, I.; Stoger-Pollach, M.; Verbeeck, J.; Mauchamp, V.; Jaouen, M.
  Title Real space maps of magnetic moments on the atomic scale: theory and feasibility Type A1 Journal article
  Year 2010 Publication Ultramicroscopy Abbreviated Journal Ultramicroscopy
  Volume 110 Issue 8 Pages 1038-1041
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
  Abstract The recently discovered EMCD technique (energy loss magnetic chiral dichroism) can detect atom specific magnetic moments with nanometer resolution, exploiting the spin selectivity of electronic transitions in energy loss spectroscopy. Yet, direct imaging of magnetic moments on the atomic scale is not possible. In this paper we present an extension of EMCD that can overcome this limit. As a model system we chose bcc Fe. We present image simulations of the L3 white line signal, based on the kinetic equation for the density matrix of the 200 kV probe electron. With actual progress in instrumentation (high brightness sources, aberration corrected lenses) this technique should allow direct imaging of spin moments on the atomic scale.
  Address
  Corporate Author Thesis
  Publisher Place of Publication (up) Amsterdam Editor
  Language Wos 000281216600016 Publication Date 2009-12-07
  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 10 Open Access
  Notes --- Approved Most recent IF: 2.843; 2010 IF: 2.063
  Call Number UA @ lucian @ c:irua:84439UA @ admin @ c:irua:84439 Serial 2830
Permanent link to this record
 

 
Author Vlasov, I.I.; Turner, S.; Van Tendeloo, G.; Shiryaev, A.A.
  Title Recent results on characterization of detonation nanodiamonds Type H3 Book chapter
  Year 2012 Publication Abbreviated Journal
  Volume Issue Pages 291-322
  Keywords H3 Book chapter; Electron microscopy for materials research (EMAT)
  Abstract
  Address
  Corporate Author Thesis
  Publisher Elsevier Place of Publication (up) Amsterdam Editor
  Language Wos Publication Date 0000-00-00
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN ISBN 978-1-4377-3465-2 Additional Links UA library record
  Impact Factor Times cited Open Access
  Notes Approved Most recent IF: NA
  Call Number UA @ lucian @ c:irua:105303 Serial 2840
Permanent link to this record
 

 
Author Zhang, X.B.; Zhang, X.F.; Amelinckx, S.; Van Tendeloo, G.; van Landuyt, J.
  Title The reciprocal space of carbon tubes: a detailed interpretation of the electron diffraction effects Type A1 Journal article
  Year 1994 Publication Ultramicroscopy Abbreviated Journal Ultramicroscopy
  Volume 54 Issue Pages 237-249
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
  Abstract
  Address
  Corporate Author Thesis
  Publisher Place of Publication (up) Amsterdam Editor
  Language Wos A1994PA59800016 Publication Date 2002-10-18
  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 2.436 Times cited 59 Open Access
  Notes Approved
  Call Number UA @ lucian @ c:irua:10006 Serial 2844
Permanent link to this record
 

 
Author Müller, K.; Schowalter, M.; Jansen, J.; Tsuda, K.; Titantah, J.; Lamoen, D.; Rosenauer, A.
  Title Refinement of the 200 structure factor for GaAs using parallel and convergent beam electron nanodiffraction data Type A1 Journal article
  Year 2009 Publication Ultramicroscopy Abbreviated Journal Ultramicroscopy
  Volume 109 Issue 7 Pages 802-814
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
  Abstract We present a new method to measure structure factors from electron spot diffraction patterns recorded under almost parallel illumination in transmission electron microscopes. Bloch wave refinement routines have been developed to refine the crystal thickness, its orientation and structure factors by comparison of experimentally recorded and calculated intensities. Our method requires a modicum of computational effort, making it suitable for contemporary personal computers. Frozen lattice and Bloch wave simulations of GaAs diffraction patterns are used to derive optimised experimental conditions. Systematic errors are estimated from the application of the method to simulated diffraction patterns and rules for the recognition of physically reasonable initial refinement conditions are derived. The method is applied to the measurement of the 200 structure factor for GaAs. We found that the influence of inelastically scattered electrons is negligible. Additionally, we measured the 200 structure factor from zero loss filtered two-dimensional convergent beam electron diffraction patterns. The precision of both methods is found to be comparable and the results agree well with each other. A deviation of more than 20% from isolated atom scattering data is observed, whereas close agreement is found with structure factors obtained from density functional theory [A. Rosenauer, M. Schowalter, F. Glas, D. Lamoen, Phys. Rev. B 72 (2005), 085326-1], which account for the redistribution of electrons due to chemical bonding via modified atomic scattering amplitudes.
  Address
  Corporate Author Thesis
  Publisher Place of Publication (up) Amsterdam Editor
  Language Wos 000266787900005 Publication Date 2009-03-23
  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 8 Open Access
  Notes Fwo; G.0425.05; Esteem; Ant 200611271505 Approved Most recent IF: 2.843; 2009 IF: 2.067
  Call Number UA @ lucian @ c:irua:77361 Serial 2856
Permanent link to this record
 

 
Author Schuddinck, W.; Van Tendeloo, G.; Barnabé, A.; Hervieu, M.; Raveau, B.
  Title Relation between structure, charge ordering and magnetotransport properties in Nd0.5Ca0.5Mn1-xCrxO3 manganites Type A1 Journal article
  Year 2000 Publication Journal of magnetism and magnetic materials T2 – Symposium G Material Physics Issues and Applications of Magnetic Oxides, at the E-MRS Spring Meeting, JUN 01-04, 1999, Strasbourg, France Abbreviated Journal J Magn Magn Mater
  Volume 211 Issue 1-3 Pages 105-110
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
  Abstract The relationships between incommensurability, charge ordering and magnetotransport properties in Nd0.5Ca0.5Mn1-xCrxO3 manganites have been studied by electron diffraction and lattice imaging versus temperature with 0.02 less than or equal to x less than or equal to 0.07. All compositions show an incommensurate superstructure over the whole temperature domain, despite the fact that they are ferromagnetic and conductive below 140 K, The q-vector (1/2 – delta)a* decreases with increasing temperature for all compositions x. For a given temperature q also decreases with x. Lattice images obtained at low temperature give a clear view of the characteristics of the incommensurate structure. They also provide a better understanding of the charge ordering process. The low-temperature form of the Cr-doped manganites is not a perfectly doubled cell [[2a(p)root 2 x 2a(p) x a(p)root 2]], but defects inducing a tripled cell occur pseudo-periodically. (C) 2000 Elsevier Science B.V. All rights reserved.
  Address
  Corporate Author Thesis
  Publisher Place of Publication (up) Amsterdam Editor
  Language Wos 000085772100017 Publication Date 2002-07-25
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0304-8853; ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor 2.63 Times cited 16 Open Access
  Notes Approved Most recent IF: 2.63; 2000 IF: 0.996
  Call Number UA @ lucian @ c:irua:104256 Serial 2858
Permanent link to this record
 

 
Author Gaouyat, L.; He, Z.; Colomer, J.-F.; Lambin, P.; Mirabella, F.; Schryvers, D.; Deparis, O.
  Title Revealing the innermost nanostructure of sputtered NiCrOx solar absorber cermets Type A1 Journal article
  Year 2014 Publication Solar energy materials and solar cells Abbreviated Journal Sol Energ Mat Sol C
  Volume 122 Issue Pages 303-308
  Keywords A1 Journal article; Engineering sciences. Technology; Electron microscopy for materials research (EMAT)
  Abstract Conversion of solar energy into thermal energy helps reducing consumption of non-renewable energies. Cermets (ceramicmetal composites) are versatile materials suitable, amongst other applications, for solar selective absorbers. Although the presence of metallic Ni particles in the dielectric matrix is a prerequisite for efficient solar selective absorption in NiCrOx cermets, no clear evidence of such particles is reported so far. By combining comprehensive chemical and structural analyses, we reveal the presumed nanostructure which is at the origin of the remarkable optical properties of this cermet material. Using sputtered NiCrOx layers in a solar absorber multilayer stack on aluminium substrate allows us to achieve solar absorptance as high as α=96.1% while keeping thermal emissivity as low as ε=2.2%, both values being comparable to best values recorded so far. With the nanostructure of sputtered NiCrOx cermets eventually revealed, further optimization of solar absorbers can be anticipated and technological exploitation of cermet materials in other applications can be foreseen.
  Address
  Corporate Author Thesis
  Publisher Place of Publication (up) Amsterdam Editor
  Language Wos 000331494200040 Publication Date 2013-11-12
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0927-0248; ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor 4.784 Times cited 12 Open Access
  Notes Approved Most recent IF: 4.784; 2014 IF: 5.337
  Call Number UA @ lucian @ c:irua:113086 Serial 2902
Permanent link to this record
 

 
Author Salluzzo, M.; Aruta, C.; Ausanio, G.; Bals, S.; d' Agostino, A.; Maglione, M.G.
  Title Role of Nd/Ba substitution on the growth mode and on the structural properties of Nd-rich Re1(NdxBa2-x)Cu3O7-\delta (Re=Nd, Y) thin films Type A1 Journal article
  Year 2002 Publication Physica: C : superconductivity Abbreviated Journal Physica C
  Volume 372-376 Issue 2 Pages 675-678
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
  Abstract Thin films of the superconducting Nd1+xBa2−xCu3O7−δ (NBCO) and Y1(NdxBa2−x)Cu3O7−δ (YNBCO) compounds have been deposited by dc magnetron sputtering and diode high pressure oxygen sputtering. Different techniques, including scanning tunneling microscopy, atomic force microscopy, X-ray diffraction and transmission electron microscopy (TEM) have been used to study the film microstructures and the surface morphology. It is shown that the Nd/Ba exchange promotes a 2D heteroepitaxial growth in the case of the NBCO films deposited on (1 0 0) SrTiO3 substrates, with a suppression of the characteristic 3D spirals structures. On the contrary in YNBCO the Nd/Ba exchange does not provide a driving force for the suppression of screw-dislocations, since spirals or towers originated by screw and half loop dislocations are observed on the surface. TEM reveals that anti-phase boundaries are eliminated during the growth of NBCO films thanks to the Nd/Ba exchange while this mechanism is not operating in the case of YNBCO films.
  Address
  Corporate Author Thesis
  Publisher Place of Publication (up) Amsterdam Editor
  Language Wos 000178018800024 Publication Date 2002-08-26
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0921-4534; ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor 1.404 Times cited 5 Open Access
  Notes Approved Most recent IF: 1.404; 2002 IF: 0.912
  Call Number UA @ lucian @ c:irua:87909 Serial 2917
Permanent link to this record
 

 
Author Farvacque, J.L.; Bougrioua, Z.; Moerman, I.; Van Tendeloo, G.; Lebedev, O.
  Title Role of the defect microstructure on the electrical transport properties in undoped and Si-doped GaN grown by LP-MOVPE Type A1 Journal article
  Year 1999 Publication Physica: B : condensed matter T2 – 20th International Conference on Defects in Semiconductors (ICDS-20), JUL 26-30, 1999, BERKELEY, CA Abbreviated Journal Physica B
  Volume 273-4 Issue Pages 140-143
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
  Abstract Experimental results show that the room-temperature carrier mobility in bulk layers of undoped or Si-doped GaN grown by LP-MOVPE on sapphire substrate shows a sudden increase as soon as the carrier density exceeds a critical value of about 10(18) cm(-3). We show that such a behavior can be theoretically reproduced by assuming that the columnar structure i.e. the dislocation microstructure is responsible for internal electronic barriers. (C) 1999 Elsevier Science B.V. All rights reserved.
  Address
  Corporate Author Thesis
  Publisher Place of Publication (up) Amsterdam Editor
  Language Wos 000084452200031 Publication Date 2002-07-26
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0921-4526; ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor 1.386 Times cited 5 Open Access
  Notes Approved Most recent IF: 1.386; 1999 IF: 0.725
  Call Number UA @ lucian @ c:irua:102892 Serial 2925
Permanent link to this record
 

 
Author Zhang, X.F.; Van Tendeloo, G.; Hu, D.W.; Brabers, V.A.M.
  Title Room temperature (2a x 2b) superstructure formed in Sr-submitted Bi2(Sr1.6Y0.4)CaCu2Oy single crystals Type A1 Journal article
  Year 1997 Publication Physica: C : superconductivity Abbreviated Journal Physica C
  Volume 278 Issue Pages 31-38
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
  Abstract
  Address
  Corporate Author Thesis
  Publisher Place of Publication (up) Amsterdam Editor
  Language Wos A1997XB79300004 Publication Date 0000-00-00
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0921-4534 ISBN Additional Links UA library record; WoS full record;
  Impact Factor 1.404 Times cited Open Access
  Notes Approved Most recent IF: 1.404; 1997 IF: 2.199
  Call Number UA @ lucian @ c:irua:21436 Serial 2928
Permanent link to this record
 

 
Author Vanhellemont, J.; Maes, H.E.; Schaekers, M.; Armigliato, A.; Cerva, H.; Cullis, A.; de Sande, J.; Dinges, H.; Hallais, J.; Nayar, V.; Pickering, C.; Stehlé, J.L.; Van Landuyt, J.; Walker, C.; Werner, H.; Salieri, P.;
  Title Round-robin investigation of silicon-oxide on silicon reference materials for ellipsometry Type A1 Journal article
  Year 1993 Publication Applied surface science T2 – SYMP ON DIAGNOSTIC TECHNIQUES FOR SEMICONDUCTOR MATERIALS ANALYSIS AND, FABRICATION PROCESS CONTROL, AT THE 1992 SPRING CONF OF THE EUROPEAN, MATERIALS RESEARCH SOC, JUN 02-05, 1992, STRASBOURG, FRANCE Abbreviated Journal Appl Surf Sci
  Volume 63 Issue 1-4 Pages 45-51
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
  Abstract The main results and conclusions are presented of a round robin study of silicon oxide on silicon reference samples for ellipsometry. The oxide films with nominal thicknesses of 10, 50 and 120 nm are grown by thermal oxidation. The oxide film thicknesses have been determined by single wavelength ellipsometry (SWE), by spectroscopic ellipsometry (SE) and by cross-sectional conventional and high-resolution transmission electron microscopy (TEM and HREM) in different laboratories. The main conclusions are that special precautions have to be taken in order to use TEM as a reliable thickness measurement technique; that single wavelength ellipsometry can be used with great accuracy and reproducibility for the 50 and 120 nm film thicknesses but that it shows some inherent problems for the 10 nm films; and that spectroscopic ellipsometry showed for all film thicknesses an accuracy and reproducibility which is clearly superior to that of SWE.
  Address
  Corporate Author Thesis
  Publisher Elsevier science bv Place of Publication (up) Amsterdam Editor
  Language Wos A1993KF03400009 Publication Date 2002-10-16
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0169-4332; ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor 2.711 Times cited 13 Open Access
  Notes Approved
  Call Number UA @ lucian @ c:irua:104539 Serial 2932
Permanent link to this record
 

 
Author Amelinckx, S.; Milat, O.; Van Tendeloo, G.
  Title Selective imaging of sublattices in complex structures Type A1 Journal article
  Year 1993 Publication Ultramicroscopy Abbreviated Journal Ultramicroscopy
  Volume 51 Issue Pages 90-108
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
  Abstract
  Address
  Corporate Author Thesis
  Publisher Place of Publication (up) Amsterdam Editor
  Language Wos A1993LN79100010 Publication Date 2002-10-18
  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 2.436 Times cited 8 Open Access
  Notes Approved CHEMISTRY, PHYSICAL 54/144 Q2 # PHYSICS, ATOMIC, MOLECULAR & CHEMICAL 9/35 Q2 #
  Call Number UA @ lucian @ c:irua:6835 Serial 2964
Permanent link to this record
 

 
Author Milat, O.; Van Tendeloo, G.; Amelinckx, S.
  Title Selective imaging of the “substructures” in incommensurately modulated intergrowth crystal structures Type A1 Journal article
  Year 1992 Publication Ultramicroscopy Abbreviated Journal Ultramicroscopy
  Volume 41 Issue Pages 65-76
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
  Abstract
  Address
  Corporate Author Thesis
  Publisher Place of Publication (up) Amsterdam Editor
  Language Wos A1992HX68100006 Publication Date 2002-10-18
  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 2.436 Times cited 5 Open Access
  Notes Approved MATERIALS SCIENCE, MULTIDISCIPLINARY 96/271 Q2 #
  Call Number UA @ lucian @ c:irua:4437 Serial 2966
Permanent link to this record
 

 
Author Amin-Ahmadi, B.; Aashuri, H.
  Title Semisolid structure for M2 high speed steel prepared by cooling slope Type A1 Journal article
  Year 2010 Publication Journal of materials processing technology Abbreviated Journal J Mater Process Tech
  Volume 210 Issue 12 Pages 1632-1635
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
  Abstract Effects of cooling slope angle and the temperature of molten metal on the globular structure of M2 high speed steel after holding at the semisolid state have been investigated. The globular structure was achieved by pouring the molten metal at 1595 °C on the ceramic cooling slope with the length of 200 mm and the angle of 25°. The globular structure of M2 high speed steel in the form of rolledannealed and as cast condition after holding at semisolid state has been achieved. The size of globular grains of cooling slope sample was smaller than that of the rolledannealed and as cast samples. Solid particles of rolledannealed sample after holding at semisolid state had better roundness compared with cooling slope sample. Dissolution of carbides in the austenite phase at grain boundaries leads to formation of globular particles in the semisolid state. MC-type and M6C-type eutectic carbides reprecipitate during cooling cycle along grain boundaries.
  Address
  Corporate Author Thesis
  Publisher Place of Publication (up) Amsterdam Editor
  Language Wos 000280498200011 Publication Date 2010-06-02
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0924-0136; ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor 3.147 Times cited 12 Open Access
  Notes Approved Most recent IF: 3.147; 2010 IF: 1.570
  Call Number UA @ lucian @ c:irua:122042 Serial 2983
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Author Mi, Y.; Zhang, X.; Yang, Z.; Li, Y.; Zhou, S.; Zhang, H.; Zhu, W.; He, D.; Wang, J.; Van Tendeloo, G.
  Title Shape selective growth of single crystalline MnOOH multipods and 1D nanowires by a reductive hydrothermal method Type A1 Journal article
  Year 2007 Publication Materials letters Abbreviated Journal Mater Lett
  Volume 61 Issue 8/9 Pages 1781-1784
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
  Abstract
  Address
  Corporate Author Thesis
  Publisher Place of Publication (up) Amsterdam Editor
  Language Wos 000245476900043 Publication Date 2006-08-18
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0167-577X; ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor 2.572 Times cited 13 Open Access
  Notes Approved Most recent IF: 2.572; 2007 IF: 1.625
  Call Number UA @ lucian @ c:irua:64275 Serial 2991
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Author Zhang, X.F.; Zhang, X.B.; Bernaerts, D.; Van Tendeloo, G.; Amelinckx, S.; van Landuyt, J.; Werner, H.
  Title A simple preparation method for air-sensitive specimens for transmission electron microscopy demonstrated by Rb6C60 Type A1 Journal article
  Year 1994 Publication Ultramicroscopy Abbreviated Journal Ultramicroscopy
  Volume 55 Issue Pages 25-30
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
  Abstract In this paper a particularly simple but efficient method is presented by which samples of alkali-doped C-60 materials or other air-sensitive materials can be prepared and transferred into a transmission electron microscope for direct observations and investigations. Flexible, transparent glove bags are used which are filled to a slight overpressure with dry nitrogen. Under this protective atmosphere, the air-sensitive sample is mounted in the specimen holder and inserted in the vacuum of the electron microscope. Rb6C60 which is prepared and transferred into the microscope in this way has been investigated by transmission electron microscopy (TEM). The results confirm the bcc structure and especially the location of the rubidium atoms.
  Address
  Corporate Author Thesis
  Publisher Place of Publication (up) Amsterdam Editor
  Language Wos A1994PE30800005 Publication Date 2002-10-18
  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 2.436 Times cited 2 Open Access
  Notes Approved CHEMISTRY, PHYSICAL 77/144 Q3 # MATHEMATICS, INTERDISCIPLINARY 19/101 Q1 # PHYSICS, ATOMIC, MOLECULAR & CHEMICAL 17/35 Q2 #
  Call Number UA @ lucian @ c:irua:10007 Serial 3002
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Author Massobrio, C.; Djimbi, D.M.; Matsubara, M.; Scipioni, R.; Boero, M.
  Title Stability of Ge12C48 and Ge20C40 heterofullerenes : a first principles molecular dynamics study Type A1 Journal article
  Year 2013 Publication Chemical physics letters Abbreviated Journal Chem Phys Lett
  Volume 556 Issue Pages 163-167
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
  Abstract By using first-principles molecular dynamics, we address the issue of structural stability for the C-60 Ge-m(m) family of doped heterofullerenes through a set of calculations targeting C48Ge12 and C40Ge20. Three kinds of theoretical tools are employed: (a) static structural optimization, (b) a bonding analysis based on localized orbitals (Wannier wavefunctions and centers) and (c) first-principles molecular dynamics at finite temperature. This latter tool allows concluding that the segregated form of C40Ge20 is less stable than its Si-based counterpart. However, the non-segregated forms of C40Ge20 and C40Si20 have comparable stabilities at finite temperatures. (C) 2012 Elsevier B. V. All rights reserved.
  Address
  Corporate Author Thesis
  Publisher Place of Publication (up) Amsterdam Editor
  Language Wos 000313644100032 Publication Date 2012-11-28
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0009-2614; ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor 1.815 Times cited 3 Open Access
  Notes Approved Most recent IF: 1.815; 2013 IF: 1.991
  Call Number UA @ lucian @ c:irua:110085 Serial 3132
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Author Misko, V.R.; Fomin, V.M.; Devreese, J.T.; Moshchalkov, V.V.
  Title Stability of vortex-antivortex molecules in mesoscopic superconducting triangles Type A1 Journal article
  Year 2004 Publication Physica C-Superconductivity And Its Applications Abbreviated Journal Physica C
  Volume 404 Issue Pages 251-255
  Keywords A1 Journal article; Electron Microscopy for Materials Science (EMAT);
  Abstract
  Address
  Corporate Author Thesis
  Publisher Place of Publication (up) Amsterdam Editor
  Language Wos 000221211500046 Publication Date 2004-02-28
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0921-4534; ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor 1.404 Times cited 2 Open Access
  Notes Approved Most recent IF: 1.404; 2004 IF: 1.072
  Call Number UA @ lucian @ c:irua:49453 Serial 3135
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Author Lichtert, S.; Verbeeck, J.
  Title Statistical consequences of applying a PCA noise filter on EELS spectrum images Type A1 Journal article
  Year 2013 Publication Ultramicroscopy Abbreviated Journal Ultramicroscopy
  Volume 125 Issue Pages 35-42
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
  Abstract Principal component analysis (PCA) noise filtering is a popular method to remove noise from experimental electron energy loss (EELS) spectrum images. Here, we investigate the statistical behaviour of this method by applying it on a simulated data set with realistic noise levels. This phantom data set provides access to the true values contained in the data set as well as to many different realizations of the noise. Using least squares fitting and parameter estimation theory, we demonstrate that even though the precision on the estimated parameters can be better as the CramérRao lower bound, a significant bias is introduced which can alter the conclusions drawn from experimental data sets. The origin of this bias is in the incorrect retrieval of the principal loadings for noisy data. Using an expression for the bias and precision of the singular values from literature, we present an evaluation criterion for these singular values based on the noise level and the amount of information present in the data set. This criterion can help to judge when to avoid PCA noise filtering in practical situations. Further we show that constructing elemental maps of PCA noise filtered data using the background subtraction method, does not guarantee an increase in the signal to noise ratio due to correlation of the spectral data as a result of the filtering process.
  Address
  Corporate Author Thesis
  Publisher Place of Publication (up) Amsterdam Editor
  Language Wos 000314679700006 Publication Date 2012-10-27
  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 54 Open Access
  Notes Fwo; Countatoms; Vortex; Esteem 312483; esteem2jra3 ECASJO; Approved Most recent IF: 2.843; 2013 IF: 2.745
  Call Number UA @ lucian @ c:irua:105293 Serial 3153
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Author Béché, A.; Rouviere, J.L.; Barnes, J.P.; Cooper, D.
  Title Strain measurement at the nanoscale : comparison between convergent beam electron diffraction, nano-beam electron diffraction, high resolution imaging and dark field electron holography Type A1 Journal article
  Year 2013 Publication Ultramicroscopy Abbreviated Journal Ultramicroscopy
  Volume 131 Issue Pages 10-23
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
  Abstract Convergent beam electron diffraction (CBED), nano-beam electron diffraction (NBED or NBD), high resolution imaging (HRTEM and HRSTEM) and dark field electron holography (DFEH or HoloDark) are five TEM based techniques able to quantitatively measure strain at the nanometer scale. In order to demonstrate the advantages and disadvantages of each technique, two samples composed of epitaxial silicon-germanium layers embedded in a silicon matrix have been investigated. The five techniques are then compared in terms of strain precision and accuracy, spatial resolution, field of view, mapping abilities and ease of performance and analysis. (C) 2013 Elsevier By. All rights reserved.
  Address
  Corporate Author Thesis
  Publisher Place of Publication (up) Amsterdam Editor
  Language Wos 000322631200002 Publication Date 2013-04-06
  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 73 Open Access
  Notes Approved Most recent IF: 2.843; 2013 IF: 2.745
  Call Number UA @ lucian @ c:irua:109774 Serial 3171
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Author Aichele, T.; Robin, I.-C.; Bougerol, C.; André, R.; Tatarenko, S.; Van Tendeloo, G.
  Title Structural and optical properties of CdSe quantum dots induced by amorphous Se Type A1 Journal article
  Year 2007 Publication Journal of crystal growth Abbreviated Journal J Cryst Growth
  Volume 301 Issue Pages 281-284
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
  Abstract
  Address
  Corporate Author Thesis
  Publisher Place of Publication (up) Amsterdam Editor
  Language Wos 000246015800065 Publication Date 2007-01-17
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0022-0248; ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor 1.751 Times cited 5 Open Access
  Notes Approved Most recent IF: 1.751; 2007 IF: 1.950
  Call Number UA @ lucian @ c:irua:64716 Serial 3200
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Author Huvé, M.; Van Tendeloo, G.; Hervieu, M.; Maignan, A.; Raveau, B.
  Title Structural and physical properties of the new superconductor Hg0.5Pb0.5Sr4-xBaxCu2(CO3)O7-\delta Type A1 Journal article
  Year 1994 Publication Physica: C : superconductivity Abbreviated Journal Physica C
  Volume 231 Issue Pages 15-20
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
  Abstract
  Address
  Corporate Author Thesis
  Publisher Place of Publication (up) Amsterdam Editor
  Language Wos A1994PJ98200004 Publication Date 2002-10-17
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0921-4534; ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor 0.942 Times cited 14 Open Access
  Notes Approved
  Call Number UA @ lucian @ c:irua:10035 Serial 3201
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Author Vasiliev, A.L.; Van Tendeloo, G.; Amelinckx, S.; Boikov, Y.; Olsson, E.; Ivanov, Z.
  Title Structural aspect of YBa2Cu3O7-x films on Sis with complex barrier layers Type A1 Journal article
  Year 1995 Publication Physica: C : superconductivity Abbreviated Journal Physica C
  Volume 244 Issue Pages 373-388
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
  Abstract
  Address
  Corporate Author Thesis
  Publisher Place of Publication (up) Amsterdam Editor
  Language Wos A1995QQ29300025 Publication Date 2003-04-05
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0921-4534; ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor 0.942 Times cited 28 Open Access
  Notes Approved
  Call Number UA @ lucian @ c:irua:13312 Serial 3203
Permanent link to this record
 

 
Author Frangis, N.; Van Tendeloo, G.; van Landuyt, J.; Muret, P.; Nguyen, T.T.A.
  Title Structural characterisation of erbium silicide thin films of an Si(111) substrate Type A1 Journal article
  Year 1996 Publication Journal of alloys and compounds Abbreviated Journal J Alloy Compd
  Volume 234 Issue 2 Pages 244-250
  Keywords A1 Journal article; Engineering sciences. Technology; Electron microscopy for materials research (EMAT)
  Abstract ErSi2-x films (x = 0.1-0.3) grown by co-evaporation at different deposition ratios have been characterised by transmission electron microscopy, electron diffraction and high resolution electron microscopy. A very good epitaxial growth relation with the Si substrate was deduced for a1 samples and observed phases. Different defect modulated structures are formed; they can be described as structural variants (orthorhombic or rhombohedral) of the basic structure. The modulated phases are related to deviations from stoichiometry similar to crystallographic shear structures. The ErSi1.9 material contains Si precipitates, illustrating the preference for the ErSi1.7 composition to be maintained.
  Address
  Corporate Author Thesis
  Publisher Place of Publication (up) Amsterdam Editor
  Language Wos A1996TX65100020 Publication Date 2002-07-26
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0925-8388; ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor 2.999 Times cited 14 Open Access
  Notes Approved
  Call Number UA @ lucian @ c:irua:15451 Serial 3213
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Author Krsmanovic, R.; Bals, S.; Bertoni, G.; Van Tendeloo, G.
  Title Structural characterization of Er-doped Li2O-Al2O3-SiO2 glass ceramics Type A1 Journal article
  Year 2008 Publication Optical materials Abbreviated Journal Opt Mater
  Volume 30 Issue 7 Pages 1183-1188
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
  Abstract Particularly favourable properties of glass ceramics are developed on the basis of two key advantages of these materials: the variation of chemical composition and of microstructure. Therefore, detailed structural and chemical information are necessary to get insight in novel glass ceramic materials. We present here two examples of Er-doped Li2O-Al2O3-SiO2, with different quantities of ZrO2, both obtained with sol-gel synthesis. Different transmission electron microscopy techniques: conventional TEM, HRTEM, and EELS are used and the results are compared with those previously obtained with XRD and Rietveld analysis. We also demonstrate the 3D reconstruction, obtained from HAADF-STEM imaging, to determine the morphology of nanosize precipitates in these composites. (c) 2007 Elsevier B.V. All rights reserved.
  Address
  Corporate Author Thesis
  Publisher Place of Publication (up) Amsterdam Editor
  Language Wos 000254419100035 Publication Date 2007-07-11
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0925-3467; ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor 2.238 Times cited 12 Open Access
  Notes Iap-V1; Esteem Approved Most recent IF: 2.238; 2008 IF: 1.714
  Call Number UA @ lucian @ c:irua:70004 Serial 3219
Permanent link to this record
 

 
Author Van Tendeloo, G.; Krekels, T.; Milat, O.; Amelinckx, S.
  Title Structural effects of element substitution on superconducting properties in 1-2-3 YBCO: an electron microscopy study Type A1 Journal article
  Year 1993 Publication Journal of alloys and compounds Abbreviated Journal J Alloy Compd
  Volume 195 Issue Pages 307-314
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
  Abstract
  Address
  Corporate Author Thesis
  Publisher Place of Publication (up) Amsterdam Editor
  Language Wos A1993LC49200075 Publication Date 2003-06-21
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0925-8388; ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor 2.999 Times cited 1 Open Access
  Notes Approved
  Call Number UA @ lucian @ c:irua:6790 Serial 3234
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