Large-Size 2D β-Cu<sub>2</sub> S Nanosheets with Giant Phase Transition Temperature Lowering (120 K) Synthesized by a Novel Method of Super-Cooling Chemical-Vapor-Deposition.

Li, Bo; Huang, Le; Zhao, Guangyao; Wei, Zhongming; Dong, Huanli; Hu, Wenping; Wang, Lin-Wang; Li, Jingbo · Adv Mater · 2016

basic_science · Level V

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Abstract

2D triangular β-Cu<sub>2</sub> S nanosheets with large size and high quality are synthesized by a novel method of super-cooling chemical-vapor-deposition. The phase transition of this 2D material from β-Cu<sub>2</sub> S to γ-Cu<sub>2</sub> S occurs at 258 K (-15 °C), and such transition temperature is 120 K lower than that of its bulk counterpart (about 378 K).