Dynamics of laser-induced cesium atom desorption from porous glass

Year: 2006

Authors: Kawalec T., Kasprowicz M.J., Jozefowski L., Burchianti A., Marinelli C., Rubahn H.-G.

Autors Affiliation: Marian Smoluchowski Institute of Physics, Jagiellonian University, Reymonta 4, 30-059, Poland; Universita degli Studi di Siena, Dipartimento di Fisica, Universita di Siena, Via Roma 56, I-53100 Siena, Italy; Fysisk Institut, Syddansk Universitet, DK-5230 Odense M, Denmark

Abstract: The dynamics of short pulsed infrared laser-induced desorption of Cesium atoms from porous silica samples has been investigated. We find most probable kinetic energies of 69 ± 6 meV for desorption laser fluences between 60 and 190 mJ/cm2, significantly higher compared to those obtained for Cs desorption from plain glass, 40 ± 2 meV, but lower compared to those observed for Na and Rb desorption from polymeric surfaces, 200 meV. This is explained qualitatively by scattering of the desorbing atoms with the silica nanochannels, thus suggesting different pulsed laser photodesorption processes for atoms embedded in hard porous dielectrics as compared to polymeric thin films. (c) 2006 Elsevier B.V. All rights reserved.

Journal/Review: CHEMICAL PHYSICS LETTERS

Volume: 420 (4-6)      Pages from: 291  to: 295

More Information: TK, MK, AB and HGR thank the Danish research foundations SNF (21-03-0469) and STVF (26-04-0253) as well as the European Communities Human Potential Programme under contract HPRN-CT-2002-00304, ‘FASTNet’, for support. We are grateful to Vladimir G. Bordo for discussions about the desorption mechanism.
KeyWords: Desorption; Dielectric materials; Kinetic energy; Porous materials; Silica; Thin films, Laser-induced cesium atom; Laser-induced desorption; Silica nanochannels, Cesium
DOI: 10.1016/j.cplett.2005.12.091

Citations: 7
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