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Gold Nanoclusters Supported on MgO: Synthesis, Characterization, and Evidence of Au<INF>6</INF>
- Source :
- Nano Letters; December 12, 2001, Vol. 1 Issue: 12 p689-692, 4p
- Publication Year :
- 2001
-
Abstract
- Gold nanoclusters on MgO powder were prepared from adsorbed [Au(CH<INF>3</INF>)<INF>2</INF>(C<INF>5</INF>H<INF>7</INF>O<INF>2</INF>)] and characterized by infrared and X-ray absorption spectroscopies. Treatment of the samples in He or H<INF>2</INF> at increasing temperatures removed CH<INF>3</INF> and C<INF>5</INF>H<INF>7</INF>O<INF>2</INF> ligands and caused the gold to aggregate into nanoclusters of increasing size, ultimately those with the properties of metallic gold. Treatment in He at 373 K gave clusters that are inferred to be nearly monodisperse Au<INF>6</INF>, with first- and second-shell Au−Au coordination numbers of 4.0 ± 0.4 and 1.0 ± 0.1, respectively, corresponding to Au<INF>6</INF> octahedra.
Details
- Language :
- English
- ISSN :
- 15306984 and 15306992
- Volume :
- 1
- Issue :
- 12
- Database :
- Supplemental Index
- Journal :
- Nano Letters
- Publication Type :
- Periodical
- Accession number :
- ejs1873376