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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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Hamer, Matthew J.
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Topics
Publications (7/7 displayed)
- 2020Atomic Resolution Imaging of CrBr 3 using Adhesion-Enhanced Gridscitations
- 2020Atomic Resolution Imaging of CrBr3 using Adhesion-Enhanced Gridscitations
- 2019Formation and healing of defects in atomically thin GaSe and InSecitations
- 2019Control of electron-electron interaction in graphene by proximity screening
- 2019Indirect to direct gap crossover in two-dimensional InSe revealed by angle-resolved photoemission spectroscopycitations
- 2018Infrared-to-violet tunable optical activity in atomic films of GaSe, InSe, and their heterostructurescitations
- 2018Nanometer Resolution Elemental Mapping in Graphene-based TEM Liquid Cellscitations
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article
Nanometer Resolution Elemental Mapping in Graphene-based TEM Liquid Cells
Abstract
We demonstrate a new design of graphene liquid cell consisting of a thin lithographically patterned hexagonal boron nitride crystal encapsulated from both sides with graphene windows. The ultra-thin window liquid cells produced have precisely controlled volumes and thicknesses, and are robust to repeated vacuum cycling. This technology enables exciting new opportunities for liquid cell studies, providing a reliable platform for high resolution transmission electron microscope imaging and spectral mapping. The presence of water was confirmed using electron energy loss spectroscopy (EELS) via the detection of the oxygen K-edge and measuring the thickness of full and empty cells. We demonstrate the imaging capabilities of these liquid cells by tracking the dynamic motion and interactions of small metal nanoparticles with diameters of 0.5-5 nm. We further present an order of magnitude improvement in the analytical capabilities compared to previous liquid cell data, with 1 nm spatial resolution elemental mapping achievable for liquid encapsulated bimetallic nanoparticles using energy dispersive X-ray spectroscopy (EDXS).