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Positronium annihilation and pore surface chemistry in mesoporous silica films
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10.1063/1.2756310
/content/aip/journal/apl/91/2/10.1063/1.2756310
http://aip.metastore.ingenta.com/content/aip/journal/apl/91/2/10.1063/1.2756310
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(Color online) FTIR spectra of F38-TEOS and m-F38-TEOS.

Image of FIG. 2.
FIG. 2.

(Color online) (a) Positron lifetime spectra of F38-TEOS and m-F38-TEOS and (b) o-Ps lifetime distributions in mesopores.

Image of FIG. 3.
FIG. 3.

(Color online) (a) Variations of o-Ps lifetimes in mesoporous silica films upon surface trimethylsilylation. The open circles correspond to lifetime changes vs pore sizes for the unmodified films prepared with P103, F38, F88, and F127. The dashed and solid curves are the simulated variations of o-Ps lifetimes upon the surface modification versus the pore sizes of unmodified films under assumptions of cubic and rectangular pores, respectively. In the simulation, the electron layer thickness of the modified films and the pore size reduction by the surface modification were assumed 0.15 and , respectively. (b) Variations of o-Ps intensities in mesoporous silica films upon surface trimethylsilylation.

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/content/aip/journal/apl/91/2/10.1063/1.2756310
2007-07-10
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Positronium annihilation and pore surface chemistry in mesoporous silica films
http://aip.metastore.ingenta.com/content/aip/journal/apl/91/2/10.1063/1.2756310
10.1063/1.2756310
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