| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5366942 | Applied Surface Science | 2006 | 7 Pages |
Abstract
Positron annihilation lifetime spectra were measured for mesoporous silica films, which were synthesized using triblock copolymer (EO106PO70EO106) as a structure-directing agent. Different positron lifetime spectra for the deposited and calcined films indicated the formation of meso-structure after calcination, which was confirmed by Fourier transform infrared (FTIR) spectra and field emission-scanning electron microscopy (FE-SEM) observation. Open porosity or pore interconnectivity of a silica film might be evaluated by a two-dimensional positron annihilation lifetime spectrum of an uncapped film. Pore sizes and their distributions in the silica films were found to be affected by thermal treatments.
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Authors
Chunqing He, Makoto Muramatsu, Toshiyuki Ohdaira, Atsushi Kinomura, Ryoichi Suzuki, Kenji Ito, Yoshinori Kabayashi,