Abstract
We demonstrate a novel process for preparing densely packed film of silver nanoparticles at the liquid-liquid interface followed by a transmetallation reaction with gold ion to yield a film of bimetallic nanoparticles. Films of assembled silver as well as Ag-Au bimetallic were characterized by UV-vis-spectroscopy, transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS) analysis. I-V measurement shows linear behavior for both the films with ca. five orders of magnitude drop in resistance for the Ag-Au bimetallic film. Temperature dependent I-V measurement revealed a semiconductor to metal transition after transmetallation reaction. The films where checked for their potential application in chemical vapor sensing to ammonia vapors.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1248-1251 |
| Number of pages | 4 |
| Journal | Thin Solid Films |
| Volume | 519 |
| Issue number | 3 |
| DOIs | |
| State | Published - Nov 30 2010 |
Keywords
- Bimetallic film
- Gas sensing
- I-V measurements
- Liquid-liquid interface
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Surfaces and Interfaces
- Surfaces, Coatings and Films
- Metals and Alloys
- Materials Chemistry