Synthesis of silica-gold nanocomposites and their porous nanoparticles by an in-situ approach |
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| Authors: | Kumar Ashavani Pushparaj Victor L Murugesan Saravanababu Viswanathan Gunaranjan Nalamasu Rohit Linhardt Robert J Nalamasu Omkaram Ajayan Pulickel M |
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| Institution: | Department of Materials Science and Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, USA. |
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| Abstract: | We demonstrate the one-step synthesis of a silica-gold nanocomposite by simultaneous hydrolysis and reduction of gold chloride. The aminophenyl group was used as a reducing agent, and the trimethoxy silane group acts a precursor for the formation of silica. The porous gold nanoparticles were formed by etching out the silica-gold nanocomposite by hydrofluoric acid. The electron diffraction of porous gold nanoparticles showed that the particle are polycrystalline with FCC structure. The silica-gold nanocomposite exhibited nonlinear current-voltage behavior, and the porous gold nanoparticles displayed linear current-voltage behavior. |
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