JJAP Conference Proceedings

JJAP Conf. Proc. 2, 011204 (2014) doi:10.7567/JJAPCP.2.011204

Positron annihilation study of silica films templated by a cationic surfactant

Bangyun Xiong1, Wenfeng Mao1, Xiuqin Tang1, Kenji Ito2, Chunqing He1

  1. 1Key Laboratory of Nuclear Solid State Physics Hubei Province, School of Physics and Technology, Wuhan University, Wuhan 430072, China
  2. 2National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8565, Japan
  • Received April 03, 2014
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Porous silica films were synthesized via a sol–gel method using tetraethyl orthosilicate with mixing hexadecyltrimethylammonium bromide (CTAB) as a structural template. Doppler broadening of positron annihilation radiation spectroscopy based on a slow positron beam and ellipsometry were applied to the study of the prepared silica films. The obtained results suggested that a nanoscopic structure change for the porous silica films takes place around 15 wt % of the CTAB loading.

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