Formation of Au-Pt bimetallic nanoparticles in a two-layer SiO(2) films doped with Au and Pt, respectively, through interlayer diffusion
IR@CGCRI: CSIR-Central Glass and Ceramic Research Institute, Kolkata
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| Title |
Formation of Au-Pt bimetallic nanoparticles in a two-layer SiO(2) films doped with Au and Pt, respectively, through interlayer diffusion
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| Creator |
Pal, Sudipto
De, Goutam |
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| Subject |
Processing Science
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| Description |
Bimetallic Au-Pt nanoparticles have been generated inside a relatively porous SiO(2) film matrix by a two-layer (2L) coating methodology. Two overlapping coating layers were deposited on glass substrates from Au- and Pt-doped inorganic-organic hybrid silica sols and air dried at 60 degrees C. The 2L coating assembly was then UV- and followed by heat-treated at 450 and 550 degrees C in air. UV-treatment decomposes AuCl(4)(-) and PtCl(6)(2-) ions in the respective layers and the subsequent heat treatment in air influences the diffusion of Au- and Pt nanometals to each other to form bimetallic Au-Pt nanoparticles inside the silica matrix. A UV-visible study showed damping of Au-plasmon after heat treatments. GIXRD and TEM analyses reveal the formation of a partial Au/Pt solid solution with a small fraction of Pt (similar to 16%), while the major fraction of Pt remains fused with the Au(Pt) solid solution.
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| Publisher |
ROYAL SOC CHEMISTRY
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| Date |
2008-05
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cgcri.csircentral.net/390/1/Phys_Chem__Chem_Phys_10_(2008)_4062%2D4066.pdf
Pal, Sudipto and De, Goutam (2008) Formation of Au-Pt bimetallic nanoparticles in a two-layer SiO(2) films doped with Au and Pt, respectively, through interlayer diffusion. PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 10 (27). pp. 4062-4066. |
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| Relation |
http://cgcri.csircentral.net/390/
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