| 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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Seifner, Michael S.
TU Wien
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (5/5 displayed)
- 2023Electrical and Structural Properties of Si1−xGex Nanowires Prepared from a Single-Source Precursorcitations
- 2023Direct Observation of Liquid–Solid Two-Phase Seed Particle-Assisted Kinking in GaP Nanowire Growthcitations
- 2023Insights into the Synthesis Mechanisms of Ag-Cu3P-GaP Multicomponent Nanoparticlescitations
- 2021Dynamic Processes in Metal-Semiconductor Nanoparticle Heterostructures
- 2019Epitaxial Ge0.81Sn0.19 nanowires for nanoscale mid-infrared emitterscitations
Places of action
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conferencepaper
Dynamic Processes in Metal-Semiconductor Nanoparticle Heterostructures
Abstract
Over the last years, there have been huge research efforts in the synthesis of advanced nanoparticle heterostructures to promote their performance in photocatalysis.[1] Especially, the combination of metals with semiconductors has been identified as a potential approach to enhance the photocatalytic activity via efficient charge carrier separation enabled by plasmon- exciton coupling.[2] The physical properties of such heterostructures highly depend on the present crystal facets and heterointerfaces.[3] Consequently, a detailed characterisation of nanoparticle heterostructures to determine the impact of morphological/structural properties on the photocatalytic activity is of high importance in this research field and paves the way towards facet-engineered surface and heterointerface design via advanced synthesis procedures. In this study, we combine Cu3-xP – a p-type semiconductor with a band gap of ~1.5 eV[4] – and Ag to form a metal-semiconductor nanoparticle heterostructure with potential in water splitting and investigate dynamic processes occurring around the synthesis of such structures.For that purpose, Ag-Cu nanoparticle heterostructures synthesised in a spark ablation system[5] were deposited on a heating chip for in situ transmission electron microscopy (TEM) investigations. Subsequently, the heating chip was transferred to an environmental TEM with integrated metalorganic chemical vapour deposition (MOCVD) system. The controlled supply of phosphine (PH3) at moderate temperatures initiated the Cu-Cu3-xP phase transformation in a Ag-Cu nanoparticle heterostructure with a Ag(111)/Cu(111) interface oriented parallel to the electron beam and both phases tilted in their [110] zone axes. We characterized the present phases via high-resolution TEM imaging and energy dispersive X-ray spectroscopy (EDS). The analysis of selected averaged frames of a high-resolution TEM movie capturing the phase transformation reveals the dynamic processes occurring in the nanoparticle heterostructure. The nucleation of the ...