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|Title:||Photochemical formation of silver nanoparticles in poly(N-vinylpyrrolidone)|
|Authors:||Huang, H.H. |
|Source:||Huang, H.H.,Ni, X.P.,Loy, G.L.,Chew, C.H.,Tan, K.L.,Loh, F.C.,Deng, J.F.,Xu, G.Q. (1996-02-21). Photochemical formation of silver nanoparticles in poly(N-vinylpyrrolidone). Langmuir 12 (4) : 909-912. ScholarBank@NUS Repository.|
|Abstract:||Silver nanoparticles have been prepared by photoreduction of silver nitrate with 254 nm UV light in the presence of poly(N-vinylpyrrolidone). The effects of PVP concentration on the particle size, the UV-vis absorption peak, and the rate of the photoreduction process were studied. The average particle size ranged from 15.2 to 22.4 nm, with the corresponding UV-vis absorption peak position at 404-418 nm in 1-0.25 wt % PVP. The rate of the photoreduction process was observed to increase with the PVP concentration. X-ray photoelectron speetroscopic studies further revealed that the polymer interacts with silver particles through the oxygen atom in the >C=O group. A negative shift of binding energy in the Ag 3d5/2 for silver nanoparticles was observed.|
|Appears in Collections:||Staff Publications|
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