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Local structure of Se nanotube investigated by X-ray absorption fine structure spectroscopy

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Abstract

The structures of selenium nanoparticles and nanotubes synthesized by the dismutation of precursor Na2SeSO3 under acidic condition in micellar solution are studied by transmission electron microscopy (TEM), X-ray diffraction (XRD) and X-ray absorption fine structure spectroscopy (XAFS). Spherical-like nanoparticles contain both amorphous and crystalline parts while, as shown by XRD patterns, nanotubes have the crystal structure of trigonal selenium (t-Se). They display quite different XANES spectral features indicating different local atomic arrangements. Theoretical XANES calculations show that the local structure around Se atom in the nanotubes is similar to a hexangular cylinder. Quantitative extended XAFS (EXAFS) analysis further shows that the average Se–Se bond length for both nanotubes and nanoparticles is 2.35 Å.

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Acknowledgments

This work was supported by the National Natural Science Foundation of China (No. 10905058, 10635060, 20701036).The authors would like to thank the BSRF and NSRL facilities that provided the beam time. A special acknowledgement is due to Prof. A. Marcelli, Dr. Zhenyu Yao, Mr. Pengfei An, and Mr. Nan Qiu for their invaluable support.

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Authors and Affiliations

  1. National Synchrotron Radiation Laboratory, University of Science and Technology of China, 42# HeZuoHua South Road, 230029, Hefei, Anhui, People’s Republic of China

    Yajuan Feng, Zhi Xie, Zhihu Sun, Tao Yao, Yuanyuan Li, Ziyu Wu, Zhiyun Pan & Shiqiang Wei

  2. Institute of High Energy Physics, Chinese Academy of Sciences, 100049, Beijing, People’s Republic of China

    Jing Zhang, Ziyu Wu & Lirong Zheng

Authors
  1. Yajuan Feng
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  2. Zhi Xie
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  3. Zhihu Sun
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  4. Jing Zhang
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  5. Tao Yao
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  6. Yuanyuan Li
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  7. Ziyu Wu
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  8. Lirong Zheng
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  9. Zhiyun Pan
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  10. Shiqiang Wei
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Corresponding author

Correspondence to Shiqiang Wei.

Additional information

Invited Contribution presented to the 1st Bilateral Italian Chinese Workshop on Synchrotron radiation time resolved concurrent experiments: advantages and future applications. A new Italian route to China (Shanghai, November 11, 2010). Each article of this volume was accepted after a peer review procedure.

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Feng, Y., Xie, Z., Sun, Z. et al. Local structure of Se nanotube investigated by X-ray absorption fine structure spectroscopy. Rend. Fis. Acc. Lincei 22 (Suppl 1), 17–24 (2011). https://doi.org/10.1007/s12210-011-0150-4

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