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Open AccessArticle

Controlled Synthesis of Au Nanocrystals-Metal Selenide Hybrid Nanostructures toward Plasmon-Enhanced Photoelectrochemical Energy Conversion

1
Department of Physics, Hunan Normal University, Changsha 410081, China
2
Key Laboratory for Matter Microstructure and Function of Hunan Province, Hunan Normal University, Changsha 410081, China
3
Institute of Mathematics and Physics, Central South University of Forestry and Technology, Changsha 410004, China
4
School of Materials Science and Energy Engineering, Foshan University, Foshan 528000, Guangdong Province, China
5
Hunan Key Laboratory of Super Microstructure and Ultrafast Process, School of Physics and Electronics, Central South University, Changsha 410083, China
6
Department of Physics, Key Laboratory of Artificial Micro-and Nano-Structures of the Ministry of Education, Wuhan University, Wuhan 430072, China
*
Authors to whom correspondence should be addressed.
Nanomaterials 2020, 10(3), 564; https://doi.org/10.3390/nano10030564
Received: 18 February 2020 / Revised: 16 March 2020 / Accepted: 16 March 2020 / Published: 20 March 2020
(This article belongs to the Special Issue Nano-Hybrids: Synthesis, Characterization and Applications)
A simple method for the controllable synthesis of Au nanocrystals–metal selenide hybrid nanostructures via amino acid guiding strategy is proposed. The results show that the symmetric overgrowth mode of PbSe shells on Au nanorods can be precisely manipulated by only adjusting the initial concentration of Pb2+. The shape of Au–PbSe hybrids can evolve from dumbbell-like to yolk-shell. Interestingly, the plasmonic absorption enhancement could be tuned by the symmetry of these hybrid nanostructures. This provides an effective pathway for maneuvering plasmon-induced energy transfer in metal–semiconductor hybrids. In addition, the photoactivities of Au–PbSe nanorods sensitized TiO2 electrodes have been further evaluated. Owing to the synergism between effective plasmonic enhancement effect and efficient interfacial charge transfer in these hybrid nanostructures, the Au–PbSe yolk-shell nanorods exhibit an outstanding photocurrent activity. Their photocurrent density is 4.38 times larger than that of Au–PbSe dumbbell-like nanorods under light irradiation at λ > 600 nm. As a versatile method, the proposed strategy can also be employed to synthesize other metal–selenide hybrid nanostructures (such as Au–CdSe, Au–Bi2Se3 and Au–CuSe). View Full-Text
Keywords: gold-metal selenide; hollow hybrid nanostructure; surface plasmon resonance; morphology manipulation; photoelectrochemical response gold-metal selenide; hollow hybrid nanostructure; surface plasmon resonance; morphology manipulation; photoelectrochemical response
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MDPI and ACS Style

Tang, L.; Liang, S.; Li, J.-B.; Zhang, D.; Chen, W.-B.; Yang, Z.-J.; Xiao, S.; Wang, Q.-Q. Controlled Synthesis of Au Nanocrystals-Metal Selenide Hybrid Nanostructures toward Plasmon-Enhanced Photoelectrochemical Energy Conversion. Nanomaterials 2020, 10, 564.

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