Microfluidic System for Synthesis of Trigonal Selenium Nanowires

高等学校化学研究 ›› 2010, Vol. 26 ›› Issue (4): 522-526.

Microfluidic System for Synthesis of Trigonal Selenium Nanowires

BIAN Tian-bin¹, YIN Xue-feng^1,2* and LIU Jin-hua²

1. Institute of Microanalytical Systems, Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China;
2. College of Material Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 310036, P. R. China

收稿日期:2009-11-09 修回日期:2010-03-19 出版日期:2010-07-25 发布日期:2010-10-01
通讯作者: YIN Xue-feng. E-mail: yinxf@zju.edu.cn
基金资助:
Supported by the Natural Science Foundation of Zhejiang Province, China(No.Z407029) and the Hangzhou Qianjiang Scholar Foundation, China(No.HZ2010-41).

Microfluidic System for Synthesis of Trigonal Selenium Nanowires

BIAN Tian-bin¹, YIN Xue-feng^1,2* and LIU Jin-hua²

1. Institute of Microanalytical Systems, Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China;
2. College of Material Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 310036, P. R. China

Received:2009-11-09 Revised:2010-03-19 Online:2010-07-25 Published:2010-10-01
Contact: YIN Xue-feng. E-mail: yinxf@zju.edu.cn
Supported by:
Supported by the Natural Science Foundation of Zhejiang Province, China(No.Z407029) and the Hangzhou Qianjiang Scholar Foundation, China(No.HZ2010-41).

摘要/Abstract

摘要： A microfluidic system was developed for the synthesis of trigonal selenium(t-Se) nanowires, which was composed of a glass microchip coupled with a poly(methyl methacrylate)(PMMA) microchip. In the glass microchip, amorphous selenium(a-Se) colloid was prepared by reducing selenious acid with an excess amount of hydrazine at a temperature of 100 °C. In the coupled PMMA microchip, a-Se was transformed into more stable t-Se seeds via sonication at room temperature. The residence time of the reactants in both microchips was optimized by varying the dimension and length of the microchannel each. The t-Se nanowires were formed by anisotropic growth of selenium crystallite during sonication and aging under the assistance of β-cyclodextrin(β-CD). Various stages of the nanowires’ growth were investigated. The as-synthesized products were characterized by powder X-Ray diffraction(XRD), Raman spectroscopy, scanning electron microscopy(SEM), transmission electron microscopy(TEM) and selected-area electron diffraction(SAED).

关键词: Microfluidic, Trigonal selenium nanowire, Sonication

Abstract: A microfluidic system was developed for the synthesis of trigonal selenium(t-Se) nanowires, which was composed of a glass microchip coupled with a poly(methyl methacrylate)(PMMA) microchip. In the glass microchip, amorphous selenium(a-Se) colloid was prepared by reducing selenious acid with an excess amount of hydrazine at a temperature of 100 °C. In the coupled PMMA microchip, a-Se was transformed into more stable t-Se seeds via sonication at room temperature. The residence time of the reactants in both microchips was optimized by varying the dimension and length of the microchannel each. The t-Se nanowires were formed by anisotropic growth of selenium crystallite during sonication and aging under the assistance of β-cyclodextrin(β-CD). Various stages of the nanowires’ growth were investigated. The as-synthesized products were characterized by powder X-Ray diffraction(XRD), Raman spectroscopy, scanning electron microscopy(SEM), transmission electron microscopy(TEM) and selected-area electron diffraction(SAED).

Key words: Microfluidic, Trigonal selenium nanowire, Sonication

BIAN Tian-bin, YIN Xue-feng* and LIU Jin-hua. Microfluidic System for Synthesis of Trigonal Selenium Nanowires[J]. 高等学校化学研究, 2010, 26(4): 522-526.

BIAN Tian-bin, YIN Xue-feng* and LIU Jin-hua2. Microfluidic System for Synthesis of Trigonal Selenium Nanowires[J]. Chemical Research in Chinese Universities, 2010, 26(4): 522-526.

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Microfluidic System for Synthesis of Trigonal Selenium Nanowires

Microfluidic System for Synthesis of Trigonal Selenium Nanowires

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