Journal
SMALL
Volume 14, Issue 12, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201703077
Keywords
gold nanorods-copper sulfide; heterostructures; photostability; photothermal therapies
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Funding
- Natural Science Foundation of Liaoning Province of China [201602688]
- National Natural Science Foundation of China [21401132, 21505045]
- Shanghai Pujiang Program [16PJ1402700, 15PJ1401800]
- Career Development Support Plan for Young and Middle-aged Teachers in Shenyang Pharmaceutical University [ZQN2015026]
- Research Project of Science and Technology of Department of Education of Liaoning Province [L2014401]
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Plasmonic gold nanorods (Au NRs)-copper sulfide heterostructures have recently attracted much attention owing to the synergistically enhanced photothermal properties. However, the facile synthesis and interface tailoring of Au NRs-copper sulfide heterostructures remain a formidable challenge. In this study, the rational design and synthesis of Au NRs-Cu7S4 heterostructures via a one-pot hydrothermal process is reported. Specifically, core-shell and dumbbell-like Au NRs-Cu7S4 heterostructures are obtained with well-controlled interfaces by employing the Au NRs with different aspect ratios. Both core-shell and dumbbell-like Au NRs-Cu7S4 have proven effective as photothermal therapy agents, which offer both high photothermal stability and significant photothermal conversion efficiency up to 62%. The finite-difference time domain simulation results confirm the coupling effect that leads to the enhanced local field as well as the optical absorption at the heterostructure interface. Importantly, these Au NRs-Cu7S4 heterostructures can be compatibly used as an 808 nm laser-driven photothermal therapy agents for the efficient photothermal therapy of cancer cells in vitro. This study will provide new insight into the design of other noble metal-semiconductor heterostructures for a broad range of applications utilizing surface plasmon resonance enhancement phenomena.
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