A new approach for the synthesis of Au-Ag alloy nanoparticle incorporated SiO(2) films
IR@CGCRI: CSIR-Central Glass and Ceramic Research Institute, Kolkata
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| Title |
A new approach for the synthesis of Au-Ag alloy nanoparticle incorporated SiO(2) films
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| Creator |
Pal, Sudipto
De, Goutam |
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| Subject |
Engineering Materials
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| Description |
A new synthesis procedure has been developed to prepare Au-Ag alloy nanoparticles inside glassy SiO(2) film matrix. Two successive overlapping coating layers were prepared on glass substrate using Au-and Ag-incorporated inorganic-organic hybrid silica sols, respectively. The concentrations of the An and Ag (3 equivalent mol % metal - 97% silica in each case) in the respective layers and their individual coating thicknesses were kept similar for the generation of 1:1 Au-Ag (AU(0.5)Ag(0.5)) alloy. The dried two-layer (TL) coating assembly after UV (2.75 J/cm(2)) and followed by thermal treatments (450-550 degrees C) yielded Au-Ag alloy nanoparticles of controllable molar ratios in a glassy SiO(2) matrix. Thus, the UV-treated TL film when heated at 450 degrees C yielded spherical Au-Ag alloy nanoparticles (An mol fraction;approximate to 0.8) of average diameter ((D)) 2.5 nm whereas the 550 degrees C heated film sample showed relatively larger alloy nanoparticles of < D > 4.5 nm having An mol fraction of approximate to 0.5. The alloy nanoparticles were formed through the interlayer diffusion of Ag and Au during the thermal annealing in the solid state.
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| Publisher |
American Chemical Society
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| Date |
2005-11
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cgcri.csircentral.net/1268/1/sudipto'05.pdf
Pal, Sudipto and De, Goutam (2005) A new approach for the synthesis of Au-Ag alloy nanoparticle incorporated SiO(2) films. Chemistry of Materials., 17 (24). pp. 6161-6166. ISSN 0897-4756 |
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| Relation |
http://cgcri.csircentral.net/1268/
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