Chemical Research in Chinese Universities ›› 2016, Vol. 32 ›› Issue (6): 1028-1033.doi: 10.1007/s40242-016-6085-7

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Studies on Optical Properties of Si220 Nanoclusters via Time-dependent Density Functional Theory Calculations

YANG Wenhua1,2, LÜ Wencai1,2, XUE Xuyan2, ZANG Qingjun2, WANG Caizhuang3   

  1. 1. Institute of Theoretical Chemistry, Jilin University, Changchun 130021, P. R. China;
    2. Laboratory of Fiber Materials and Modern Textile, Growing Base for State Key Laboratory, College of Physics, Qingdao University, Qingdao 266071, P. R. China;
    3. Ames Laboratory-US DOE and Department of Physics and Astronomy, Iowa State University, Ames, IA 50011, USA
  • Received:2016-03-09 Revised:2016-03-24 Online:2016-12-01 Published:2016-09-12
  • Contact: LÜ Wencai, E-mail:wencailu@jlu.edu.cn E-mail:wencailu@jlu.edu.cn
  • Supported by:

    Supported by the National Natural Science Foundation of China(No.21273122).

Abstract:

The optical properties of bare and hydrogen passivated Si220 nanoclusters(NCs) in four typical motifs(i.e., bulk-like, onion-like, bucky-diamond and icosahedral motifs) were studied via time-dependent density functional theory(TD-DFT) calculations. The calculation results show that there is a significant blue shift in the optical absorption spectra when the Si NCs are passivated with hydrogen. A strong absorption peak in the visible light region appears for the hydrogenated bulk-like, onion-like and bucky-diamond Si NCs.

Key words: Si220 nanocluster, Optical property, Time-dependent density functional theory(TD-DFT)