Laser-induced fabrication of platinum nanoshells having enhanced catalytic and Raman properties

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• 作者：Mee Rahn Kim^a ; Jong-Yeob Kim^a ; Seol Ji Kim^a ; Du-Jeon Jang ; ^a ; ^{djjang@snu.ac.kr}
• 关键词：Catalysis ; Laser irradiation ; Nanocomposite ; Nanoparticle ; SERS ; Silica
• 刊名：Applied Catalysis A: General
• 出版年：2011
• 出版时间：15 February 2011
• 年：2011
• 卷：393
• 期：1-2
• 页码：317-322
• 全文大小：934 K

文摘

Platinum nanoclusters topped on silica nanospheres, prepared by a seeded-growth method, have been transformed into platinum nanoshells having uniform shell thickness of 6 nm via irradiation of nanosecond laser pulses. The thickness of platinum nanoshells can be tuned readily by adjusting the concentration of H₂PtCl₆ for the growth of platinum nanoparticles on silica nanospheres. Compared with Pt nanoclusters-topped silica nanospheres, platinum nanoshells coated on silica nanospheres have been found to catalyze the degradation of rhodamine B very rapidly in the presence of KBH₄, and they show highly active surface-enhanced Raman scattering.