| 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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Mølhave, Kristian S.
Technical University of Denmark
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (18/18 displayed)
- 2024Microheater Controlled Crystal Phase Engineering of Nanowires Using In Situ Transmission Electron Microscopycitations
- 2024Microheater Controlled Crystal Phase Engineering of Nanowires Using In Situ Transmission Electron Microscopycitations
- 2024Operando Electron Microscopy and Impedance Analysis of Solid Oxide Electrolysis and Fuel Cellscitations
- 2021Development of high-temperature electrochemical TEM and its application on solid oxide electrolysis cells
- 2021Initiation and Progression of Anisotropic Galvanic Replacement Reactions in a Single Ag Nanowirecitations
- 2020Complex Aerosol Characterization by Scanning Electron Microscopy Coupled with Energy Dispersive X-ray Spectroscopycitations
- 2018Influence of Cetyltrimethylammonium Bromide on Gold Nanocrystal Formation Studied by in Situ Liquid Cell Scanning Transmission Electron Microscopycitations
- 2017Direct bonding of ALD Al2O3 to silicon nitride thin filmscitations
- 2016Controlling nanowire growth through electric field-induced deformation of the catalyst dropletcitations
- 2016In-Situ Transmission Electron Microscopy on Operating Electrochemical Cells
- 2016Effect of Synthesis Parameters on the Structure and Magnetic Properties of Magnetic Manganese Ferrite/Silver Composite Nanoparticles Synthesized by Wet Chemistry Methodcitations
- 2015Feasibility of the development of reference materials for the detection of Ag nanoparticles in food: neat dispersions and spiked chicken meatcitations
- 2011Titanium tungsten coatings for bioelectrochemical applications
- 2010Customizable in situ TEM devices fabricated in freestanding membranes by focused ion beam millingcitations
- 2008Epitaxial Integration of Nanowires in Microsystems by Local Micrometer Scale Vapor Phase Epitaxycitations
- 2003Soldering of Nanotubes onto Microelectrodescitations
- 2003Solid gold nanostructures fabricated by electron beam depositioncitations
- 2001Customizable nanotweezers for manipulation of free-standing nanostructurescitations
Places of action
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article
Initiation and Progression of Anisotropic Galvanic Replacement Reactions in a Single Ag Nanowire
Abstract
The galvanic replacement reaction(GRR) is a convenient method for synthesizing hollow/porous noble metal nanostructures with energy,health, and environmental applications. Understanding the reaction mechanism is important for optimizing the produced nanostructures’physicochemical properties. Using liquid-phase scanning transmission electron microscopy (LPSTEM), we quantitatively analyzed the GRR processin individual silver nanowires (AgNWs) reacting with an aqueous HAuCl<sub>4</sub> solution. The experiments and atomic-scale simulations show that GRR is a highly selective process with respect to the exposed surface facets, and we discover that the process progression is influenced by the internal crystal domains. We observe that the etching of AgNWs starts preferentially from facets with high energy sites while not favorable on low energy {111} facets, where even the internal twin facets within the nanostructures are found to be temporarily stable. The LPSTEM-observed etch rates in single or multiple crystal segmentsin AgNWs are shown to approach diffusion-limited conditions. These results provide intricate and detailed insights into the GRR process, which are difficult to achieve by other methods, and such studies will be beneficial for the understanding of how the surface energy and number of available surface sites influence the initiation probability, which will theoretically guide the synthesis of nanostructures, also supported with the deeper understanding of how the internal structure may influence the process.