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MAHALINGAM K, EYINK KG, BROWN GJ, DORSEY DL. APPLICATION OF EXIT-PLANE WAVE FUNCTION IMAGES IN HIGH-RESOLUTION TRANSMISSION ELECTRON MICROSCOPY FOR QUANTITATIVE ANALYSIS OF III–V SEMICONDUCTOR INTERFACES. INTERNATIONAL JOURNAL OF NANOSCIENCE 2011. [DOI: 10.1142/s0219581x04002668] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
An image simulation study is performed to investigate the applicability of exit-plane wave function (EPWF) images for an atomic-level compositional mapping of interfaces in the GaAs – AlAs system. A simple procedure for quantifying the composition across an interface, which is based on the method of factorial analysis of correspondence is proposed. A test of this procedure on a simulated EPWF-phase image of Al 0.4 Ga 0.6 As/GaAs/Al 0.4 Ga 0.6 As structure, with an atomically abrupt interface on one side and a graded interface on the other, yields profiles which mimic the model-profiles.
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Affiliation(s)
- K. MAHALINGAM
- Air Force Research Laboratory, Materials and Manufacturing Directorate, Wright-Patterson Air Force Base, OH 45433-7707, USA
| | - K. G. EYINK
- Air Force Research Laboratory, Materials and Manufacturing Directorate, Wright-Patterson Air Force Base, OH 45433-7707, USA
| | - G. J. BROWN
- Air Force Research Laboratory, Materials and Manufacturing Directorate, Wright-Patterson Air Force Base, OH 45433-7707, USA
| | - D. L. DORSEY
- Air Force Research Laboratory, Materials and Manufacturing Directorate, Wright-Patterson Air Force Base, OH 45433-7707, USA
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2
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Abstract
The idea of the method is to analyse a crystal lattice by creating a grid of quadrilaterals corresponding to repeated cells that are visible in the image. This approach combines image processing elements with a continuum field theory, to create a distortion-independent similarity measure that is used to select the most appropriate among possible lattice configurations. Subsequently, displacement and distortion fields are computed from individual cell positions. The method allows one to obtain these fields even for images where a periodic cell does not necessarily appear as a single dot of intensity in a high-resolution transmission electron microscopy (HRTEM) image, which results in a lower accuracy of commonly used approaches, namely geometric phase and peak finding. The results obtained from this method are verified quantitatively by comparison with known distortion tensor distributions and Burgers vector values on both simulated and real images.
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Affiliation(s)
- P Przybyła
- Institute of Fundamental Technological Research, PAS, ul. Pawińskiego 5B, Warszawa, Poland.
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3
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Baumann FH, Chang CP, Grazul JL, Kamgar A, Liu CT, Muller DA. A Closer “Look” at Modern Gate Oxides. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-611-c4.1.1] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
ABSTRACTUsing high resolution TEM (HRTEM), we identified some process induced ‘weak spots’ in SiO2 layers: First, we observed thinning in the periphery of the transistor, i. e. near the boundary to the shallow trench isolation. At the boundary to the shallow trench, the Si substrate gradually changes its orientation from <100> to <110>, which results in an unexpected oxidation behavior in this region. Secondly, we observed the intrusion of poly-Si grains from the gate into the gate oxide, resulting in local thinning of the dielectric. Using image simulations, we show that conventional high resolution TEM can reveal the interface roughness only to a very limited extend.
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Chason E, Falco CM, Ourmazd A, Schubert EF, Slaughter JM, Williams RS. Interface Roughness: What is it and How is it Measured? ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-280-203] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
ABSTRACTA panel discussion on interface roughness was held at the Fall 1992 Materials Research Society meeting. We present a summary of the results presented by the invited speakers on the application and interpretation of X-ray reflectivity, atomic force microscopy (AFM), scanning tunneling microscopy (STM), photoluminescence and transmission electron microscopy. A transcript of the moderated discussion is provided in the final section.
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MAHALINGAM K, EYINK K, BROWN G, DORSEY D, KISIELOWSKI C, THUST A. Compositional analysis of mixed–cation-anion III–V semiconductor interfaces using phase retrieval high-resolution transmission electron microscopy. J Microsc 2008; 230:372-81. [DOI: 10.1111/j.1365-2818.2008.01995.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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6
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Niermann T, Thiel K, Seibt M. Pattern recognition in high-resolution electron microscopy of complex materials. MICROSCOPY AND MICROANALYSIS : THE OFFICIAL JOURNAL OF MICROSCOPY SOCIETY OF AMERICA, MICROBEAM ANALYSIS SOCIETY, MICROSCOPICAL SOCIETY OF CANADA 2006; 12:476-482. [PMID: 19830939 DOI: 10.1017/s1431927606060685] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Structural features like defects or heterointerfaces in crystals or amorphous phases give rise to different local patterns in high-resolution electron micrographs or object wave functions. Pattern recognition techniques can be used to identify these typical patterns that constitute the image itself, as was already demonstrated for compositional changes in isostructural heterostructures, where the patterns within unit cells of the lattice were analyzed. To extend such analyses to more complex materials, we examined patterns in small circular areas centered on intensity maxima of the image. Nonsupervised clustering, namely, Ward's clustering method, was applied to these patterns. In two examples, a highly defective ZnMnTe layer on GaAs and a tunnel magneto resistance device, we demonstrate how typical patterns are identified by this method and how these results can be used for a further investigation of the microstructural properties of the sample.
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Affiliation(s)
- Tore Niermann
- Physikalisches Institut der Universität Göttingen, Friedrich-Hund-Platz 1, D-37077 Göttingen, Germany.
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7
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Abstract
Using high-resolution imaging at negative spherical aberration of the objective lens in an aberration-corrected transmission electron microscope, we measure the concentration of oxygen in Sigma3[111] twin boundaries in BaTiO3 thin films at atomic resolution. On average, 68% of the boundary oxygen sites are occupied, and the others are left vacant. The modified Ti2O9 group unit thus formed reduces the grain boundary energy and provides a way of accommodating oxygen vacancies occurring in oxygen-deficient material by the formation of a nanotwin lamellae structure. The atomically resolved measurement technique offers the potential for studies on oxide materials in which the electronic properties sensitively depend on the local oxygen content.
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Affiliation(s)
- C L Jia
- Institute for Solid State Research, Research Center Jülich, D-52425 Jülich, Germany
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8
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Li JH, Moss SC, Zhang Y, Mascarenhas A, Pfeiffer LN, West KW, Ge WK, Bai J. Layer ordering and faulting in (GaAs)n/(AlAs)n ultrashort-period superlattices. PHYSICAL REVIEW LETTERS 2003; 91:106103. [PMID: 14525495 DOI: 10.1103/physrevlett.91.106103] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2003] [Indexed: 05/24/2023]
Abstract
We report studies of (GaAs)(n)/(AlAs)(n) ultrashort-period superlattices using synchrotron x-ray scattering. In particular, we demonstrate that interfaces of these superlattices contain features on two different length scales: namely, random atomic mixture and ordered mesoscopic domains. Both features are asymmetric on the two interfaces (AlAs-on-GaAs and GaAs-on-AlAs) for n>2. Periodic compositional stacking faults, arising from the intrinsic nature of molecular-beam epitaxy, are found in the superlattices. In addition, the effect of growth interruption on the interfacial structure is discussed. The relevant scattering theory is developed to give excellent fits to the data.
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Affiliation(s)
- J H Li
- Physics Department, University of Houston, Houston, Texas 77204-5005, USA
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9
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Crozie PA, Catalano M, Cingolani R. A modeling and convolution method to measure compositional variations in strained alloy quantum dots. Ultramicroscopy 2003; 94:1-18. [PMID: 12489591 DOI: 10.1016/s0304-3991(02)00158-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
We have developed a method to quantitatively measure the absolute composition of nanometer sized capped quantum dots in semiconductor alloys. The method uses spatially resolved electron energy-loss spectroscopy in a scanning transmission electron microscope to measure compositional profiles across the center of the quantum dot and the adjacent nanometer wide wetting layer. The measurements from the wetting layer are used to derive a spatial broadening function which includes the effects of probe size, instabilities and beam spreading in the sample. This broadening function is employed to simulate compositional profiles from the quantum dots. Information on the dimensions of dots is extracted from annular dark-field images. The method is applied to In(y)Ga(1-y)As (y = 0.5) quantum dots grown on a GaAs substrate. In this system, a simple truncated cone model is found to give an adequate description of the compositional variations across the dot. We find a substantial enrichment in In at the center of the dots, in agreement with theoretical predictions.
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Affiliation(s)
- P A Crozie
- Center for Solid State Science, Arizona State University, P.O. Box 871704, Tempe, AZ 85287-1704, USA
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11
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Tillmann K, Luysberg M, Specht P, Weber ER. Direct compositional analysis of AlGaAs/GaAs heterostructures by the reciprocal space segmentation of high-resolution micrographs. Ultramicroscopy 2002; 93:123-37. [PMID: 12425590 DOI: 10.1016/s0304-3991(02)00153-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
A detailed description of a combined reciprocal and real space technique for the mapping of layer compositions across interior interfaces from high-resolution electron micrographs is presented. The analysis is based on the reciprocal space extraction of chemically sensitive image information encoded in lattice images of AlGaAs/GaAs heterostructures taken under optimized imaging conditions. Analysis procedures include centering a set of apertures around chemically sensitive reflections in the Fourier transform of lattice images and performing an inverse transformation, thus extracting composition related information from experimental micrographs. It is demonstrated that this approach is characterized by the same spatial resolution as real space techniques but by improved capabilities with respect to analysing images characterized by a minor signal-to-noise ratio. For illustration purposes the stability of AlAs/GaAs multiple quantum wells grown under low-temperature conditions against thermal treatment as expressed by interfacial roughness parameters is investigated.
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Affiliation(s)
- K Tillmann
- Forschungszentrum Jülich GmbH, Institut für Festkörperforschung, Germany.
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12
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Affiliation(s)
- R. Hillebrand
- Max‐Planck‐Institut für Mikrostrukturphysik, Weinberg 2, D‐06120 Halle/Saale, Germany
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13
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Bonnet N. Multivariate statistical methods for the analysis of microscope image series: applications in materials science. J Microsc 2002. [DOI: 10.1046/j.1365-2818.1998.3250876.x] [Citation(s) in RCA: 94] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- N. Bonnet
- INSERM Unit 314 (IFR 53) and University of Reims (LERI), 21, rue Clément Ader, BP 138, 51685 REIMS Cedex, France
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14
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Möbus G, Schweinfest R, Gemming T, Wagner T, Rühle M. Iterative structure retrieval techniques in HREM: a comparative study and a modular program package. J Microsc 2002. [DOI: 10.1046/j.1365-2818.1998.3120865.x] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- G. Möbus
- Max‐Planck‐Institut für Metallforschung, Seestraße 92, D‐70174 Stuttgart, Germany
| | - R. Schweinfest
- Max‐Planck‐Institut für Metallforschung, Seestraße 92, D‐70174 Stuttgart, Germany
| | - T. Gemming
- Max‐Planck‐Institut für Metallforschung, Seestraße 92, D‐70174 Stuttgart, Germany
| | - T. Wagner
- Max‐Planck‐Institut für Metallforschung, Seestraße 92, D‐70174 Stuttgart, Germany
| | - M. Rühle
- Max‐Planck‐Institut für Metallforschung, Seestraße 92, D‐70174 Stuttgart, Germany
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15
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Affiliation(s)
- P. Schwander
- Institute for Semiconductor Physics, Walter‐Korsing‐Str. 2, 15230 Frankfurt (Oder), Germany and Technical University of Brandenburg–Cottbus, PO Box 101 344, 03013 Cottbus, Germany
| | - W‐D. Rau
- Institute for Semiconductor Physics, Walter‐Korsing‐Str. 2, 15230 Frankfurt (Oder), Germany and Technical University of Brandenburg–Cottbus, PO Box 101 344, 03013 Cottbus, Germany
| | - A. Ourmazd
- Institute for Semiconductor Physics, Walter‐Korsing‐Str. 2, 15230 Frankfurt (Oder), Germany and Technical University of Brandenburg–Cottbus, PO Box 101 344, 03013 Cottbus, Germany
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16
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Stenkamp D. Detection and quantitative assessment of image aberrations from single HRTEM lattice images. J Microsc 2002. [DOI: 10.1046/j.1365-2818.1998.3000848.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- D Stenkamp
- Institut für Werkstoffwissenschaften, Lehrstuhl Mikrocharakterisierung, Universität Erlangen‐Nürnberg, Cauerstr. 6, D‐91058 Erlangen, Germany
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17
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Affiliation(s)
- W. O. Saxton
- New Hall, Cambridge CB3 0DF, and Department of Materials Science & Metallurgy, Pembroke St., Cambridge CB2 3QZ, U.K
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18
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Characterization of Structure and Composition of Quantum Dots by Transmission Electron Microscopy. NANO-OPTOELECTRONICS 2002. [DOI: 10.1007/978-3-642-56149-8_3] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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19
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Rosenauer A, Van Dyck D, Arzberger M, Abstreiter G. Compositional analysis based on electron holography and a chemically sensitive reflection. Ultramicroscopy 2001; 88:51-61. [PMID: 11393451 DOI: 10.1016/s0304-3991(00)00115-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A method for compositional analysis of low-dimensional heterostructures is presented. The suggested procedure is based on electron holography and the exploitation of the chemically sensitive (0 0 2) reflection. We apply an off-axis imaging condition with the (0 0 2) beam strongly excited and centered on the optic axis. The first side band of the hologram is centered using an "empty" reference hologram obtained for a hole of the specimen. From the centered side band we use the phase of the central (0 0 0) and the amplitude of the (0 0 2) reflections to evaluate the local composition and the local specimen thickness in an iterative and self-consistent way. Delocalization effects that lead to a shift of the spatial information of (0 0 0) and (0 0 2) reflections are taken into account. The application of the procedure is demonstrated with an AlAs/GaAs(0 0 1) superlattice with a period of 5 nm. The concentration profiles obtained are discussed in relation to segregation. The measured segregation efficiency is R = 0.51 +/- 0.02.
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20
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Kadavanich AV, Kippeny TC, Erwin MM, Pennycook SJ, Rosenthal SJ. Sublattice Resolution Structural and Chemical Analysis of Individual CdSe Nanocrystals Using Atomic Number Contrast Scanning Transmission Electron Microscopy and Electron Energy Loss Spectroscopy. J Phys Chem B 2000. [DOI: 10.1021/jp002974j] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Andreas V. Kadavanich
- Oak Ridge National Laboratory, Solid State Division, Oak Ridge, Tennessee 37831, and Vanderbilt University, Department of Chemistry, Nashville, Tennessee 37235
| | - Tadd C. Kippeny
- Oak Ridge National Laboratory, Solid State Division, Oak Ridge, Tennessee 37831, and Vanderbilt University, Department of Chemistry, Nashville, Tennessee 37235
| | - Meg M. Erwin
- Oak Ridge National Laboratory, Solid State Division, Oak Ridge, Tennessee 37831, and Vanderbilt University, Department of Chemistry, Nashville, Tennessee 37235
| | - Stephen J. Pennycook
- Oak Ridge National Laboratory, Solid State Division, Oak Ridge, Tennessee 37831, and Vanderbilt University, Department of Chemistry, Nashville, Tennessee 37235
| | - Sandra J. Rosenthal
- Oak Ridge National Laboratory, Solid State Division, Oak Ridge, Tennessee 37831, and Vanderbilt University, Department of Chemistry, Nashville, Tennessee 37235
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Abstract
The optimisation of acquisition conditions for EELS spectroscopy of Al(x)Ga(1-x)As heterostructures permits one to find the absolute concentration with a precision of better than delta = +/-0.02 and to detect changes in concentration of +/-0.01 for x = 0-0.5. In order to achieve this concentration precision, we investigated ways to reduce the influence of three major sources on the inaccuracies of the measurement: the effect of electron channelling which biases the ionisation probabilities on the different atomic sites, the contribution of the sample surface layers and the accuracy in the spectral analysis. An optimal specimen orientation that maximises the stability of the electron densities on Al and As sites without introducing an unacceptable loss of spatial resolution due to sample tilt is found by computing the electron channelling intensity as a function of the specimen tilt angle. The influence of a Ga enriched surface layer on the analysis is demonstrated. Two methods for the extraction of the edge intensity from the spectra are compared. These methods are shown to give the upper and the lower limit of the Ga concentration.
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23
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Lamy M, Thibault J. HREM of CoSi2/SiC heterophase interface: facts and artifacts in the interface distance profile measurements. Ultramicroscopy 2000; 84:101-17. [PMID: 10896144 DOI: 10.1016/s0304-3991(00)00023-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
When studying heterophase interfaces, one of the ultimate goals is to determine the local distortions and to extract a chemical profile. In this respect, HREM is a powerful tool. Nevertheless, the non-linearity of the image formation leads to artifacts both in the images and in the distance profiles extracted from the images. The present SiC/silicide interface study illustrates the misinterpretation, which might arise from measurements made on images recorded under limited experimental conditions.
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Affiliation(s)
- M Lamy
- CEA, Departement de Recherche Fondamentale sur la Matiere Condensee, Grenoble, France
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24
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Bonnet N. Artificial intelligence and pattern recognition techniques in microscope image processing and analysis. ADVANCES IN IMAGING AND ELECTRON PHYSICS 2000. [DOI: 10.1016/s1076-5670(00)80020-8] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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25
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The use of through focus exit wave reconstruction and quantitative electron diffraction in the structure determination of superconductors. Micron 1999. [DOI: 10.1016/s0968-4328(99)00042-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Rosenauer A, Gerthsen D. Atomic Scale Strain and Composition Evaluation from High-Resolution Transmission Electron Microscopy Images. ADVANCES IN IMAGING AND ELECTRON PHYSICS 1999. [DOI: 10.1016/s1076-5670(08)70187-3] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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28
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Affiliation(s)
- Fritz Phillipp
- Max-Planck-Institut für Metallforschung, Heisenbergstr. 1
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29
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Anderson S, Birkeland C, Anstis G, Cockayne D. An approach to quantitative compositional profiling at near-atomic resolution using high-angle annular dark field imaging. Ultramicroscopy 1997. [DOI: 10.1016/s0304-3991(97)00041-7] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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30
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Maurice JL, Schwander P, Baumann F, Ourmazd A. Real-space analysis of lattice images and its link to conventional theory. Ultramicroscopy 1997. [DOI: 10.1016/s0304-3991(97)00014-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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31
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Affiliation(s)
- Edward T. Yu
- Department of Electrical and Computer Engineering, University of California at San Diego, La Jolla, California 92093-0407
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32
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Compositional information from amorphous Si-Ge multilayers using high-resolution electron microscopy imaging and direct digital recording. Ultramicroscopy 1996. [DOI: 10.1016/s0304-3991(96)00093-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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33
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Hillebrand R, Werner P, Hofmeister H, Gösele U. A fuzzy logic approach to image analysis of HREM micrographs of III–V compounds. Ultramicroscopy 1996. [DOI: 10.1016/s0304-3991(96)00081-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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34
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Hillebrand R, Gösele U. A fuzzy logic approach to HREM image analysis of III–V compounds. Inf Sci (N Y) 1996. [DOI: 10.1016/0020-0255(96)00088-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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35
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Bonard JM, Ganière JD. Local quantification of the composition in GaAs/AlxGa1−xAs structures by thickness fringe analysis. Ultramicroscopy 1996; 62:249-59. [DOI: 10.1016/0304-3991(95)00153-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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36
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Abstract
Some basic quantitative analysis techniques of digitized high resolution atomic image are developed in this paper. We describe how to divide the atomic image into small independent areas with special structure information by the valley mesh segmentation method. The procedure is with regard to the bright contrast spot segmentation of atomic images. We suggest several ways for bright contrast spot localization in images. Calculation routines for peak detection and weighted local position average methods for this purpose are given.
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Affiliation(s)
- S Q Wang
- Laboratory of Atomic Imaging of Solids, Institute of Metal Research, Academia Sinica, Beijing, China
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37
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Aebersold J, Stadelmann P, Rouvière JL. Quantitative interpretation of HRTEM images using multivariate statistics: the case of the (γ, γ′)-interface in a Ni base superalloy. Ultramicroscopy 1996. [DOI: 10.1016/0304-3991(95)00148-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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38
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Paciornik S, Kilaas R, Turner J, Dahmen U. A pattern recognition technique for the analysis of grain boundary structure by HREM. Ultramicroscopy 1996; 62:15-27. [DOI: 10.1016/0304-3991(95)00084-4] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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39
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Walther T, Humphreys CJ, Grimshaw MP, Churchill AC. Detection of random alloy fluctuations in high-resolution transmission electron micrographs of AlGaAs. ACTA ACUST UNITED AC 1995. [DOI: 10.1080/01418619508239950] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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40
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Spencer GS, Menéndez J, Pfeiffer LN, West KW. Optical-phonon Raman-scattering study of short-period GaAs-AlAs superlattices: An examination of interface disorder. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 52:8205-8218. [PMID: 9979819 DOI: 10.1103/physrevb.52.8205] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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41
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Seitz H, Seibt M, Baumann FH, Ahlborn K, Schröter W. Quantitative strain mapping using high-resolution electron microscopy. ACTA ACUST UNITED AC 1995. [DOI: 10.1002/pssa.2211500206] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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42
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Baumann FH, Gribelyuk M, Kim Y, Kisielowski C, Maurice JL, Rau WD, Rentschler JA, Schwander P, Ourmazd A. High resolution composition profiles of multilayers. ACTA ACUST UNITED AC 1995. [DOI: 10.1002/pssa.2211500105] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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43
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Möbus G, Schumann E, Dehm G, Rühle M. Measurement of coherency states of metal—ceramic interfaces by HREM image processing. ACTA ACUST UNITED AC 1995. [DOI: 10.1002/pssa.2211500108] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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