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- W2027672588 endingPage "19578" @default.
- W2027672588 startingPage "19563" @default.
- W2027672588 abstract "We review recent developments in controlling photoinduced desorption processes of alkali halides. We focus primarily on hyperthermal desorption of halogen atoms and show that the yield, electronic state, and velocity distributions of desorbed atoms can be selected using tunable laser excitation. We demonstrate that the observed control is due to preferential excitation of surface excitons. This approach takes advantage of energetic differences between surface and bulk exciton states and probes the surface exciton directly. We demonstrate that desorption of these materials leads to controlled modification of their surface geometric and electronic structures. We then extend the exciton mechanism of desorption, developed for alkali halides, to metal oxide surfaces, in particular magnesium oxide. In addition, these results demonstrate that laser desorption can serve as a solid-state source of halogen and oxygen atoms, in well-defined electronic and velocity states, for studying chemical processes in the gas phase and at surfaces." @default.
- W2027672588 created "2016-06-24" @default.
- W2027672588 creator A5033952314 @default.
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- W2027672588 creator A5065437211 @default.
- W2027672588 creator A5066074129 @default.
- W2027672588 creator A5068795731 @default.
- W2027672588 date "2005-09-20" @default.
- W2027672588 modified "2023-10-14" @default.
- W2027672588 title "Laser Control of Desorption through Selective Surface Excitation" @default.
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