Tunable pores in mesoporous silica films studied using a pulsed slow positron beam

被引：20

作者：

He, Chunqing ^{[1
]}

Muramatsu, Makoto

Ohdaira, Toshiyuki

Oshima, Nagayasu

Kinomura, Atsushi

Suzuki, Ryoichi

Kobayashi, Yoshinori

机构：

[1] AIST, Tsukuba, Ibaraki 3058568, Japan

[2] AIST, Tsukuba, Ibaraki 3058565, Japan

来源：

RADIATION PHYSICS AND CHEMISTRY | 2007年 / 76卷 / 02期

基金：

日本学术振兴会;

关键词：

positronium; triblock copolymer; mesoporous silica film;

D O I：

10.1016/j.radphyschem.2006.03.036

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Positron annihilation lifetime spectroscopy (PALS) based on a pulsed slow positron beam was applied to study mesoporous silica films, synthesized using amphiphilic PEO-PPO-PEO triblock copolymers as structure-directing agents. The pore size depends on the loading of different templates. Larger pores were formed in silica films templated by copolymers with higher molecular-weights. Using 2-dimensional PALS, open porosity of silica films was also found to be influenced by the molecular-weight as well as the ratio of hydrophobic PPO moiety of the templates. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：204 / 208

页数：5

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