物理化学学报 >> 2012, Vol. 28 >> Issue (10): 2500-2506.doi: 10.3866/PKU.WHXB201209113

材料物理化学 上一篇    

铝热反应法制备双股类螺旋Zn2SnO4单晶纳米带

王煜1, 陈静1, 廖清2, 孙伟1, 厉建龙1, 张建平3, 吴凯1   

  1. 1 北京大学化学与分子工程学院,北京分子科学国家实验室,北京 100871;
    2 中国科学院化学研究所, 北京 100190;
    3 中国人民大学化学系, 北京 100872
  • 收稿日期:2012-08-28 修回日期:2012-09-10 发布日期:2012-09-26
  • 通讯作者: 厉建龙, 吴凯 E-mail:kiwu@pku.edu.cn; jlipku@pku.edu.cn
  • 基金资助:

    国家自然科学基金(20827002, 20911130229)及国家重点基础研究发展规划项目(973) (2009CB929403, 2011CB808702)资助

Bifilar Helix-Like Nanobelt of Single Crystalline Zn2SnO4 Fabricated by Aluminothermal Reaction Approach

WANG Yu1, CHEN Jing1, LIAO Qing2, SUN Wei1, LI Jianlong1, ZHANG Jianping3, WU Kai1   

  1. 1 Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China;
    2 Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R.China;
    3 Department of Chemistry, ReminUnversity of China, Beijing 100872, P. R.China
  • Received:2012-08-28 Revised:2012-09-10 Published:2012-09-26
  • Supported by:

    The project was supported by the NationalNatural Science Foundation of China (20827002, 20911130229) and National Key Basic Research Program of China (973) (2009CB929403, 2011CB808702).

摘要:

综合利用化学气相沉积、铝热反应法、汽-液-固生长法、极性面融合和稳态湍流动力学控制来大量制备双股类螺旋Zn2SnO4单晶纳米带. 该材料属于面心立方尖晶石型透明半导体, 在光伏器件和湿度与可燃气体传感器中有着广泛的应用. 扫描电镜、透射电镜、电子衍射、X射线衍射、拉曼光谱以及光发射等技术分析表明所得的双股类螺旋纳米带是由两个独立的Zn2SnO4纳米带通过扭曲纠缠和融合而成. 该双股类螺旋纳米带实际上是在轴向具有周期性的超晶格材料. 光致发光测量表明该纳米带在326.1 nm处出现强发射峰, 线宽约为1.5nm. 本研究所采用的综合制备法中的铝热反应法和稳态湍流微扰法可能有助于类似材料的控制制备.

关键词: 双股类螺旋纳米带, Zn2SnO4, 铝热反应法, 光致发光

Abstract:

This paper reports the preparation in large quantity of bifilar helix-like nanobelts of single crystalline Zn2SnO4, a face-centered cubic spinel and transparent semiconductor that possesses wide applications in photovoltaic devices and sensors for humidity and combustible gases, by using a unique approach that combines chemical vapor deposition, aluminothermal reaction, vapor-liquid-solid growth, mergence of polar planes, and kinetic control by steady-state turbulent flow. The bifilar helix-like nanobelt was formed by the twisting and merging of two independent Zn2SnO4 nanobelts, as analyzed by scanning electron microscopy, transmission electron microscopy, electron diffraction, X-ray diffraction, Raman spectroscopy, and photoluminescence. It had a periodicity along the axial direction and hence, is actually a super-lattice material. The photoluminescence measurements showed a strong light emission at 326.1 nm from the as-prepared sample with a line width of about 1.5 nm. The combined approach used in this study, in particular its aluminothermal reaction and steady-state turbulent gas flow perturbation steps, may be helpful in preparing other similar materials.

Key words: Bifilar helix-like nanobelt, Zn2SnO4, Aluminothermal reaction approach, Photoluminescence

MSC2000: 

  • O641