English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The effects of acetophenone and benzophenone on the photosensitivity of Al2O3 gel films chemically modified with benzoylacetone have been studied. Benzophenone was found to accelerate the dissociation of remaining chelate rings and densification of the gel films on UV-irradiation, whereas acetophenone was little effective. To get insight on the mechanism of sensitization by benzophenone, the effects of excitation wavelength were studied using two different excimer lasers: KrF (249nm) and XeF (351nm), nearly corresponding to the π-π* (252nm) and n-π* (335nm) transitions of benzophenone, respectively. The photolysis rate of the chelate rings in the benzophenone-containing gel films was the same as that of the undoped films for KrF (249nm) laser irradiation, while it was higher than the latter for XeF (351nm) laser irradiation. It was also found that the photolysis rate of the chelate rings was decreased by drying the gel films for a given amount of benzophenone. These findings indicate that the sensitization by benzophenone is associated with the excitation of n-π* transition of benzophenone and the abstraction of H atom from residual i-PrOH solvent in the gel films. Furthermore, the fine-patterning characteristics of modified Al2O3 gel films containing benzophenone were examined.

Effects of Sensitizers on the Photosensitivity of Chemically Modified Al<sub>2</sub>O<sub>3</sub> Gel Films