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This article is cited in 1 scientific paper (total in 1 paper)
CONDENSED MATTER
Photoextraction of molecular gases from an organic polymer film
S. N. Atutov, N. A. Danilina, A. I. Plekhanov, K. D. Poteshkina Institute of Automation and Electrometry, Siberian Branch of Russian Academy of Sciences, Novosibirsk
Abstract:
Photoextraction of various molecular gases from a polydimethylsiloxane (PDMS) polymer film has been studied. Change in the density of molecular gases has been measured as a function of the illumination duration, intensity and wavelength of light, and temperature of the coating. A linear dependence of the rate of photoextraction on the intensity of the incident light has been established. Similar to the photoelectric effect, photoextraction is absent in the long-wavelength spectral range down to $550$ nm. The effect increases sharply in the short-wavelength spectral range below a threshold of about $550$ nm. Photoextraction is absent at temperatures below the glass-transition temperature of PDMS ($-125\,^\circ$C), at which, as is known, the bulk diffusion of molecular gases in the film is strongly suppressed. At long-term irradiation of the film, the number of photoextracted molecules decreases exponentially with time. This increase is accompanied by a long tail of a diffusion form. The results indicate that photoextraction has a nonthermal nature and demonstrate the important role of bulk diffusion in the process of light-induced extraction of molecules from the surface.
Received: 24.04.2014
Citation:
S. N. Atutov, N. A. Danilina, A. I. Plekhanov, K. D. Poteshkina, “Photoextraction of molecular gases from an organic polymer film”, Pis'ma v Zh. Èksper. Teoret. Fiz., 99:11 (2014), 766–770; JETP Letters, 99:11 (2014), 661–664
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https://www.mathnet.ru/eng/jetpl3753 https://www.mathnet.ru/eng/jetpl/v99/i11/p766
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Abstract page: | 179 | Full-text PDF : | 53 | References: | 43 | First page: | 9 |
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