XAFS studies of gold-mercury nanoparticles in aqueous solutions
Abstract
We have investigated Hg-deposited-Au colloids of nanometer size by x-ray absorption fine structure (XAFS). These nanoparticles show an intense plasmon absorption band affected by the particle size. There are a number of questions concerning these nanoparticles: The first is within Au, how does the bulk metallic bonding character change to more covalent bonding in smaller clusters? The second is that when the interface/bulk ratio becomes high, how does it affect the coordination of Hg? The local information around the atoms may be crucial to understanding these nanoparticle systems. However, to our knowledge there have been no microstructural studies to address these questions. We will present XAFS of nanoparticles of different average particle size and discuss the local environment around gold and mercury.
- Publication:
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APS March Meeting Abstracts
- Pub Date:
- March 2000
- Bibcode:
- 2000APS..MARC29004S