Synthesis of Silica−Gold Nanocomposites and Their Porous Nanoparticles by an In-Situ Approach
Langmuir2006Vol. 22(21), pp. 8631–8634
Citations Over TimeTop 22% of 2006 papers
Ashavani Kumar, V. Pushparaj, Saravanababu Murugesan, G. Viswanathan, Rohit Nalamasu, Robert J. Linhardt, Omkaram Nalamasu, Pulickel M. Ajayan
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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