Solvothermal synthesis and photoluminescent properties of ZnS/cyclohexylamine: inorganic-organic hybrid semiconductor nanowires |
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Authors: | Fan Libo Song Hongwei Zhao Haifeng Pan Guohui Yu Hongquan Bai Xue Li Suwen Lei Yanqiang Dai Qilin Qin Ruifei Wang Tie Dong Biao Zheng Zhuhong Ren Xinguang |
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Institution: | Key Laboratory of Excited-State Physics, Changchun Institute of Optics, Fine Mechanics, and Physics, Chinese Academy of Sciences, 16 Eastern South-Lake Road, Changchun 130033, P. R. China. hwsong2005@yahoo.com.cn |
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Abstract: | An inorganic-organic hybrid semiconductor, ZnS/CHA (CHA = cyclohexylamine) nanocomposites was successfully synthesized via a solvothermal method using CHA as solvent, which yielded uniform and ultralong nanowires with widths of 100-1000 nm and lengths of 5-20 microm. Changing the reaction conditions could alter the morphology and optical properties of the nanocomposites. The periodic layer subnanometer structures were identified by high-resolution transmission electron microscopy (HR-TEM) images, with thickness of approximately 2 nm. The composites exhibited a very large blue-shift in their optical absorption edge as well as an exciton excitation band due to a strong quantum confinement effect caused by the internal subnanometer-scale structures. The pure hexagonal wurtzite ZnS nanowires were also obtained by extracting the ZnS/CHA nanocomposites with dimethyl formamide (DMF). In addition, the luminescent properties of exciton and defect-related transitions in different samples of ZnS/CHA were discussed in detail. |
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