Facile synthesis of pentacle gold–copper alloy nanocrystals and their plasmonic and catalytic properties

Rong He, You-Cheng Wang, Xiaoyong Wang, Zhantong Wang, Gang Liu, Wei Zhou, Longping Wen, Qunxiang Li, Xiaoping Wang, Xiaoyuan Chen, Jie Zeng () and J. G. Hou
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Rong He: Hefei National Laboratory for Physical Sciences at the Microscale and Collaborative Innovation Center of Suzhou Nano Science and Technology, University of Science and Technology of China
You-Cheng Wang: Hefei National Laboratory for Physical Sciences at the Microscale and Collaborative Innovation Center of Suzhou Nano Science and Technology, University of Science and Technology of China
Xiaoyong Wang: State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics & Center for Molecular Imaging and Translational Medicine, School of Public Health, Xiamen University
Zhantong Wang: State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics & Center for Molecular Imaging and Translational Medicine, School of Public Health, Xiamen University
Gang Liu: State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics & Center for Molecular Imaging and Translational Medicine, School of Public Health, Xiamen University
Wei Zhou: Hefei National Laboratory for Physical Sciences at the Microscale and Collaborative Innovation Center of Suzhou Nano Science and Technology, University of Science and Technology of China
Longping Wen: Hefei National Laboratory for Physical Sciences at the Microscale and Collaborative Innovation Center of Suzhou Nano Science and Technology, University of Science and Technology of China
Qunxiang Li: Hefei National Laboratory for Physical Sciences at the Microscale and Collaborative Innovation Center of Suzhou Nano Science and Technology, University of Science and Technology of China
Xiaoping Wang: Hefei National Laboratory for Physical Sciences at the Microscale and Collaborative Innovation Center of Suzhou Nano Science and Technology, University of Science and Technology of China
Xiaoyuan Chen: Laboratory of Molecular Imaging and Nanomedicine (LOMIN), National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health
Jie Zeng: Hefei National Laboratory for Physical Sciences at the Microscale and Collaborative Innovation Center of Suzhou Nano Science and Technology, University of Science and Technology of China
J. G. Hou: Hefei National Laboratory for Physical Sciences at the Microscale and Collaborative Innovation Center of Suzhou Nano Science and Technology, University of Science and Technology of China

Nature Communications, 2014, vol. 5, issue 1, 1-10

Abstract: Abstract The combination of gold and copper is a good way to pull down the cost of gold and ameliorate the instability of copper. Through shape control, the synergy of these two metals can be better exploited. Here, we report an aqueous phase route to the synthesis of pentacle gold–copper alloy nanocrystals with fivefold twinning, the size of which can be tuned in the range from 45 to 200 nm. The growth is found to start from a decahedral core, followed by protrusion of branches along twinning planes. Pentacle products display strong localized surface plasmon resonance peaks in the near-infrared region. Under irradiation by an 808-nm laser, 70-nm pentacle nanocrystals exhibit a notable photothermal effect to kill 4T1 murine breast tumours established on BALB/c mice. In addition, 70-nm pentacle nanocrystals show better catalytic activity than conventional citrate-coated 5-nm Au nanoparticles towards the reduction of p-nitrophenol to p-aminophenol by sodium borohydride.

Date: 2014
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DOI: 10.1038/ncomms5327

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