Keggin Ions as UV-Switchable Reducing Agents in the Synthesis of Au Core-Ag Shell Nanoparticles Export

@article{citeulike:1595374, abstract = {Abstract: Keggin ion-mediated synthesis of Au core-Ag shell bimetallic nanoparticles is described. Exposure of photochemically reduced aqueous (PW12O40)3- Keggin ions to AuCl4- ions leads to the formation of stable gold nanoparticles capped by the Keggin ions. The surface-bound Keggin ions may then be activated by UV irradiation and, upon exposure to Ag+ ions, reduce the metal ions to form a silver shell around the gold core. That the capping agent not only stabilizes the metal nanoparticles but also plays the role of a switchable reducing agent is a highlight of this approach with important implications in nanomaterials synthesis and catalysis.}, address = {Materials Chemistry Division, National Chemical Laboratory, Pune-411 008, India}, author = {Mandal, S. and Selvakannan, Pr and Pasricha, R. and Sastry, M.}, citeulike-article-id = {1595374}, citeulike-linkout-0 = {http://dx.doi.org/10.1021/ja034972t}, citeulike-linkout-1 = {http://pubs.acs.org/doi/abs/10.1021/ja034972t}, day = {16}, doi = {10.1021/ja034972t}, journal = {J. Am. Chem. Soc.}, keywords = {ag, agents, au, core-shell, gold, hybrid, ions, keggin, nanoparticles, photolabile, reducing, silver, synthesis, uv-switchable}, month = {July}, number = {28}, pages = {8440--8441}, posted-at = {2007-08-27 01:22:53}, priority = {2}, title = {Keggin Ions as UV-Switchable Reducing Agents in the Synthesis of Au Core-Ag Shell Nanoparticles}, url = {http://dx.doi.org/10.1021/ja034972t}, volume = {125}, year = {2003} }

TY - JOUR ID - citeulike:1595374 L3 - citeulike-article-id:1595374 N2 - Abstract: Keggin ion-mediated synthesis of Au core-Ag shell bimetallic nanoparticles is described. Exposure of photochemically reduced aqueous (PW12O40)3- Keggin ions to AuCl4- ions leads to the formation of stable gold nanoparticles capped by the Keggin ions. The surface-bound Keggin ions may then be activated by UV irradiation and, upon exposure to Ag+ ions, reduce the metal ions to form a silver shell around the gold core. That the capping agent not only stabilizes the metal nanoparticles but also plays the role of a switchable reducing agent is a highlight of this approach with important implications in nanomaterials synthesis and catalysis. IS - 28 JF - J. Am. Chem. Soc. AD - Materials Chemistry Division, National Chemical Laboratory, Pune-411 008, India EP - 8441 TI - Keggin Ions as UV-Switchable Reducing Agents in the Synthesis of Au Core-Ag Shell Nanoparticles VL - 125 SP - 8440 KW - ag KW - agents KW - au KW - core-shell KW - gold KW - hybrid KW - ions KW - keggin KW - nanoparticles KW - photolabile KW - reducing KW - silver KW - synthesis KW - uv-switchable AU - Mandal, S AU - Selvakannan, Pr AU - Pasricha, R AU - Sastry, M PY - 2003/07/16/ UR - http://dx.doi.org/10.1021/ja034972t ER -