Molecular Crystals and Liquid Crystals, Vol.491, 339-347, 2008
Deposition of Gold Shell on Polypyrrole Coated Poly(divinylbenzene) Core
Poly(divinylbenzene) (PDVB) beads (2 similar to 4m) were synthesized by precipitation polymerization and their surface was modified by introducing sulfonic acid groups to yield sulfonated PDVB (sPDVB). The sPDVB cores were initially coated with a polypyrrole (PPy) layer by chemical oxidative polymerization. In the process of formation of the gold shells, gold particles were deposited onto the previously prepared PPy-sPDVB cores as a seed material by in-situ redox reaction between Au(III) and neutral PPy and, then, uniform and smooth gold shells were gently grown on the cores by employing a electroless gold plating solution. The structure of the PPy-Au/PDVB core-shells was investigated by scanning electron microscopy (SEM). The presence of zero-valent gold was confirmed by X-ray photoelectron spectroscopy (XPS).