Evolution of pores in mesoporous silica films: Porogen loading effect

Chunqing He, Toshitaka Oka, Yoshinori Kobayashi, Nagayasu Oshima, Toshiyuki Ohdaira, Atsushi Kinomura, Ryoichi Suzuki

研究成果: Article査読

10 被引用数 (Scopus)

抄録

Mesoporous silica films were synthesized via a sol-gel process under an acidic condition. Various amounts of triblock copolymer F38 were loaded to precursor sols as the pore generator. The evolution of the pores generated by porogen decomposition was investigated as a function of F38 loading by positron annihilation gamma-ray energy spectroscopy and positron annihilation lifetime spectroscopy based on slow positron beams. The threshold of pore percolation is found to be around 10 wt% of F38 loading by positron annihilation gamma-ray energy spectroscopy. Positron annihilation lifetime spectroscopy in the films show that the pore size increases from 1 nm to 3 nm with increasing F38 loading from 5 wt% to 30 wt%.

本文言語English
ページ(範囲)183-186
ページ数4
ジャーナルApplied Surface Science
255
1
DOI
出版ステータスPublished - 2008 10 31
外部発表はい

ASJC Scopus subject areas

  • 化学 (全般)
  • 凝縮系物理学
  • 物理学および天文学(全般)
  • 表面および界面
  • 表面、皮膜および薄膜

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