Title: Facile Fabrication of Silver Nanoparticulate Films on Porous Silicon for Surface-Enhanced Infrared Absorption Spectroscopy
Abstract:A facile chemical deposition method was developed to fabricate silver nanoparticulate films on porous silicon for surface-enhanced infrared absorption(SEIRA) spectroscopy.The silver nanoparticulate fi...A facile chemical deposition method was developed to fabricate silver nanoparticulate films on porous silicon for surface-enhanced infrared absorption(SEIRA) spectroscopy.The silver nanoparticulate films were deposited on freshly anodized porous silicon through a spontaneous redox reaction between Ag+ ions and surface SiHx species.Probe molecules dissolved in ethanol were homogeneously spread on the porous membrane area with clear boundaries.The results show that three probe molecules of p-aminothiophenol,p-nitrobenzoic acid,and p-fluorothiophenol are enhanced on silver nanoparticle deposited porous silicon as 10,85 and 21 times high as on bare porous silicon respectively.Several factors such as the particle size and shape,the probe molecular binding groups and aromatic structures,and surface selection rules are considered for contribution to the SEIRA effect.Read More
Publication Year: 2011
Publication Date: 2011-01-01
Language: en
Type: article
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