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Two‐Dimensional CuSe Nanosheets with Microscale Lateral Size: Synthesis and Template‐Assisted Phase Transformation
Author(s) -
Wu XueJun,
Huang Xiao,
Liu Juqing,
Li Hai,
Yang Jian,
Li Bing,
Huang Wei,
Zhang Hua
Publication year - 2014
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201311309
Subject(s) - microscale chemistry , nanomaterials , materials science , phase (matter) , nanotechnology , fabrication , hexagonal crystal system , morphology (biology) , chemical engineering , template method pattern , crystallography , chemistry , organic chemistry , medicine , mathematics education , mathematics , alternative medicine , pathology , biology , engineering , genetics
Semiconducting nanosheets with microscale lateral size are attractive building blocks for the fabrication of electronic and optoelectronic devices. The phase‐controlled chemical synthesis of semiconducting nanosheets is of particular interest, because their intriguing properties are not only related to their size and shape, but also phase‐dependent. Herein, a facile method for the synthesis of phase‐pure, microsized, two‐dimensional (2D) CuSe nanosheets with an average thickness of approximately 5 nm is demonstrated. These hexagonal‐phased CuSe nanosheets were transformed into cubic‐phased Cu 2− x Se nanosheets with the same morphology simply by treatment with heat in the presence of Cu I cations. The phase transformation, proposed to be a template‐assisted process, can be extended to other systems, such as CuS and Cu 1.97 S nanoplates. Our study offers a new method for the phase‐controlled preparation of 2D nanomaterials, which are not readily accessible by conventional wet‐chemical methods.