| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Haberfehlner, Georg
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (13/13 displayed)
- 20232D and 3D STEM Imaging and Spectroscopy: Applications and Perspectives in View of Novel STEM Infrastructure
- 2023Large mechanical properties enhancement in ceramics through vacancy-mediated unit cell disturbancecitations
- 2023Spectral Tuning of Plasmonic Activity in 3D Nanostructures via High-Precision Nano-Printingcitations
- 2023The challenge with high permittivity acceptors in organic solar cells: a case study with Y-series derivativescitations
- 2022Quantifying Ordering Phenomena at the Atomic Scale in Rare Earth Oxide Ceramics via EELS Elemental Mapping
- 2022Challenges in the characterization of complex nanomaterials with analytical STEM
- 2021Spectroscopic STEM imaging in 2D and 3D
- 2020Study on Ca Segregation toward an Epitaxial Interface between Bismuth Ferrite and Strontium Titanatecitations
- 2020Ca segregation towards an in-plane compressive strain Bismuth Ferrite – Strontium Titanate interface
- 2019In situ real-time annealing of ultrathin vertical Fe nanowires grown by focused electron beam induced depositioncitations
- 2019Analyzing the Nanogranularity of Focused-Electron-Beam-Induced-Deposited Materials by Electron Tomographycitations
- 2016Formation of bimetallic clusters in superfluid helium nanodroplets analysed by atomic resolution electron tomography
- 2011Development of porosimetry techniques for the characterization of plasma-treated porous ultra low-K materialscitations
Places of action
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document
Challenges in the characterization of complex nanomaterials with analytical STEM
Abstract
Aberration corrected electron optics, novel detection techniques in combination with advancedcomputational capabilities have turned scanning transmission electron microscopy (STEM) intoone of the most powerful characterization techniques for a wide range of nanomaterials. Itsversatility stems from the availability of different imaging and diffraction modes as well asanalytical techniques such as electron energy-loss (EELS) and energy dispersive X-rayspectroscopy (EDX), which enables one to deduce information about structure, elementalcomposition and chemical bonding with atomic resolution [1]. This has paved the way for manybreakthroughs in understanding fundamental phenomena in physics, chemistry and materialscience in recent years.In practice, however, structural and chemical characterization on an atomic level, such as thedetection of impurities, dopants or point defects within a crystal, is often impeded by experimentalchallenges in sample preparation, limitations in signal-to-noise ratios (SNR), instrumentalinstabilities and the high current densities introduced by a highly focused electron beam. Thisleads to steady, yet often unrecognized specimen transformations [2], especially when applyingspectroscopic techniques, which in general require higher acquisition doses. This is particularlytrue for experiments that aim to determine concentrations or defects quantitatively [1, 3]. As aconsequence, many highly relevant material systems such as battery materials, materials with ahigh amount of low-coordinated surface atoms (nanoporous materials and nanoclusters) andorganic/biological materials, require the development of novel methodologies in preparation,characterisation and data analysis.The talk will give an overview over acquisition and analysis strategies for STEM spectroscopytackling the above-mentioned challenges by exemplary showcasing some selected researchquestions, with different material systems like complex oxides, metallic clusters and energymaterials.Exemplary, the column-by-column quantification of barium lanthanum ferrate and thecompositional characterization of Au@Ag and Ag@Au core-shell nanoclusters will be discussed.Emphasis will be placed on the use of direct detection detectors for EELS and complementaryhigh-sensitivity EDX.