Research Article

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2016, 9(2): 415–423

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https://doi.org/10.1007/s12274-015-0922-8

Matryoshka-caged gold nanorods: Synthesis, plasmonic properties, and catalytic activity

Wei Xiong1,2,3, Debabrata Sikdar4, Lim Wei Yap1,2, Pengzhen Guo1,2, Malin Premaratne4, Xinyong Li3, and Wenlong Cheng1,2 (*)

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1 Department of Chemical Engineering, Monash University, Clayton, VIC 3800, Australia
2 The Melbourne Centre for Nanofabrication, 151 Wellington Road, Clayton, VIC 3168, Australia
3 Key Laboratory of Industrial Ecology and Environmental Engineering and State Key Laboratory of Fine Chemicals, School of Environmental Sciences and Technology, Dalian University of Technology, Dalian 116024, China
4 Advanced Computing and Simulation Laboratory (AχL), Department of Electrical and Computer Systems Engineering, Monash University, Clayton, VIC 3800, Australia

Keywords: matryoshka-caged gold nanorods, galvanic replacement reaction, 4-nitrophenol, catalysis, surface plasmon resonance
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  • Abstract
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Matryoshka-caged gold nanorods (mCGNRs) were successfully synthesized by alternating between a seed-mediated silver-coating method and galvanic replacement reactions (GRRs). As the number of matryoshka layers of the mCGNRs increased, the plasmon resonance peak broadened and was red-shifted, and the catalytic activity towards the reduction of 4-nitrophenol (4-NTP) increased. When mCGNRs with 6 layers were used as nanocatalysts in the reduction of 4-nitrophenol, the reaction rate coefficient was 5.2- and 3.7-times higher than that of the gold-nanorod- and caged-gold-nanorod-catalyzed reductions of 4-nitrophenol, respectively. In addition, the surface-plasmon-resonance-based absorption of light enhanced the catalytic performance of the mCGNRs. With the support of a polyurethane foam, the mCGNRs synthesized in this study can be applied as recyclable heterogeneous catalysts for the reduction of 4-nitrophenol.
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Matryoshka-caged gold nanorods: Synthesis, plasmonic properties, and catalytic activity. Nano Res. 2016, 9(2): 415–423 https://doi.org/10.1007/s12274-015-0922-8

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