2014-Sustainable Industrial Processing Summit
SIPS 2014 Volume 5: Composite, Ceramic, Quasi-crystals, Nanomaterials & Coatings
| Editors: | Kongoli F |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2014 |
| Pages: | 578 pages |
| ISBN: | 978-1-987820-07-2 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Merging of Metal Nanoparticles via Wetting-Like Process
Inna Popov1;1THE HEBREW UNIVERSITY OF JERUSALEM, Jerusalem, Israel;
Type of Paper: Regular
Id Paper: 85
Topic: 6
Abstract:
It is commonly accepted that an observation of wetting phenomenon requires participation of at least one liquid phase. In the present work, we report on observation of wetting-like phenomenon at interaction between two solid nano-size particles of metals.
Merging of silver and gold nanoparticles was observed at their spontaneous contact at room temperature. The experimental part of the study was done with transmission electron microscope (TEM ). The TEM observations were supported with molecular dynamics simulation. Wetting-like behavior of silver on gold was independent on the shape of interacting nanoparticles (sphere-like or rod-like): silver behaved as a soft matter, while gold was as a hard surface being wetted and retaining its original morphology. The observed type of wetting results in merging of interacting nanoparticles which, then, share a stable atomic interface without detectable alloying. We discuss the observed phenomenon as an interplay between thermodynamics and local redox chemistry at nano-scale.