Acta Phys. -Chim. Sin. ›› 2012, Vol. 28 ›› Issue (05): 1197-1205.doi: 10.3866/PKU.WHXB201202231

• SOFT MATTER • Previous Articles     Next Articles

Comparision of Silica Anti-Reflective Films Obtained via a Sol-Gel Process in the Presence of PEG or PVP

TIAN Hong1, ZHANG -Lei2, XU Yao1, WU Dong1, WU Zhong-Hua3, LÜ Hai-Bing4, YUAN Xiao-Dong4   

  1. 1. CAS Key Laboratory for Carbon, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, P. R. China;
    2. College of Science, Henan Polytechnic University, Jiaozuo 454003, Henan Province, P. R. China;
    3. Laboratory of Synchrotron Radiation, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, P. R. China;
    4. Laer Fusion Research Center,Chinese Academy of Engineering Physics, Mianyang 621900, Sichuan Province, P. R. China
  • Received:2011-10-25 Revised:2012-01-19 Published:2012-04-26
  • Contact: XU Yao
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (10835008).

Abstract: The different effects of poly(ethylene glycol) (PEG) and poly(vinylpyrrolidone) (PVP) on the structure and laser-induced damage threshold of sol-gel silica anti-reflective films were investigated. The results of dynamic light-scattering, transmission electron microscopy (TEM), and small-angle X-ray scattering (SAXS) showed that PEG could prompt silica particles to form uniform clusters, whereas in the PVP-modified sol, the growth of silica particles was restricted. This was a result of the strong hydrogen bonds between Si―OH groups and PVP molecules Multi-fractal spectrum (MFS) analysis suggested that PEG improved the uniformity of the silica film but PVP reduced it, therefore the laser-damage resistance of the PEG-modified silica film was enhanced, but that of the PVP-modified silica film was weakened. 29Si magic-angle spinning nuclear magnetic responance (MAS NMR) showed that PEG improved the condensation of Si ―O tetrahedron, but PVP did not. This led to differences between the laser-damage resistances of PEG-modified silica films and PVP-modified silica films.

Key words: Laser-induced damage, Anti-reflection, Optical film, Surface fractal


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