کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1884808 | 1043368 | 2007 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Tunable pores in mesoporous silica films studied using a pulsed slow positron beam
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
تشعشع
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Tunable pores in mesoporous silica films studied using a pulsed slow positron beam Tunable pores in mesoporous silica films studied using a pulsed slow positron beam](/preview/png/1884808.png)
چکیده انگلیسی
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.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Radiation Physics and Chemistry - Volume 76, Issue 2, February 2007, Pages 204–208
Journal: Radiation Physics and Chemistry - Volume 76, Issue 2, February 2007, Pages 204–208
نویسندگان
Chunqing He, Makoto Muramatsu, Toshiyuki Ohdaira, Nagayasu Oshima, Atsushi Kinomura, Ryoichi Suzuki, Yoshinori Kobayashi,