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

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.

Figure optionsDownload high-quality image (167 K)Download as PowerPoint slideResearch highlights▶ Platinum nanoshells have been fabricated via laser irradiation. ▶ Nanoshell thickness has been tuned. ▶ Platinum nanoshells have high catalytic performances. ▶ Platinum nanoshells show highly active surface-enhanced Raman scattering.