De, Gautham and Rao, C. N. R. (2004) Au–Pt alloy nanocrystals incorporated in silica films. Journal of Materials Chemistry, 15 . pp. 891-894.
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Abstract
Au, Pt and Au–Pt alloy nanocrystals have been prepared in thin SiO2 film matrices by sol–gel spin-coating, followed by heating at 450 °C in 10% H2–90% Ar. X-Ray diffraction patterns reveal that the Au and Au–Pt nanocrystals have a preferential (111) orientation. Upon increasing the Pt concentration, part of the Pt does not alloy with Au, but instead forms a shell around the Au–Pt alloy core. The alloy composition itself goes up to Au(50) : Pt(50), and the Pt shells are formed around the alloy above an alloy composition of Au(75) : Pt(25). The surface plasmon resonance (SPR) band at 544 nm of Au gradually disappears due to the formation of Au–Pt alloys and core–shell structures.
| Item Type: | Article |
|---|---|
| Subjects: | Material Science > Nanochemistry |
| Divisions: | Faculty of Engineering, Science and Mathematics > School of Physics Faculty of Engineering, Science and Mathematics > School of Chemistry |
| ID Code: | 3617 |
| Deposited By: | JNCASR |
| Deposited On: | 19 Jan 2009 09:47 |
| Last Modified: | 19 Jan 2009 09:47 |
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