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Aqueous preparation of surfactant-free copper selenide nanowires
Xinqi Chen1, Zhen Li2, Jianping Yang3
1Institute for Superconducting and Electronic Materials, Squires Way, Innovation Campus of University of Wollongong, Wollongong, NSW 2500, Australia; Institute of Nanoscience and Nanotechnology, Department of Physics, Central China Normal University, Wuhan 430079, China.
Abstract:
Uniform surfactant-free copper selenide (Cu2-xSe) nanowires were prepared via an aqueous route. The effects of reaction parameters such as Cu/Se precursor ratio, Se/NaOH ratio, and reaction time on the formation of nanowires were comprehensively investigated. The results show that Cu2-xSe nanowires were formed through the assembling of CuSe nanoplates, accompanied by their self-redox reactions. The resultant Cu2-xSe nanowires were explored as a potential thermoelectric candidate in comparison with commercial copper selenide powder. Both synthetic and commercial samples have a similar performance and their figures of merit are 0.29 and 0.38 at 750K, respectively.
