Photoinduced Spatiotemporal Oscillations and Self-Organization of Dissipative Structures in Polymer-Immobilized Dispersed Semiconductors

Authors O.V. Gradov1, 2 , M.A. Gradova1

1N.N. Semenov Institute of Chemical Physics of Russian Academy of Sciences, 4, Kosygin Str., 119991 Moscow, Russia

2Talroze Institute for Energy Problems of Chemical Physics of Russian Academy of Sciences, 38/2, Leninsky Pr., 119334, Moscow, Russia

Issue Volume 10, Year 2018, Number 4
Dates Received 07 April 2018; revised manuscript received 12 August 2018; published online 25 August 2018
Citation O.V. Gradov, M.A. Gradova, J. Nano- Electron. Phys. 10 No 4, 04022 (2018)
PACS Number(s) 47.20.Hw, 47.54.Jk, 61.46.Df, 82.40.Ck, 82.45.Mp, 82.50.Nd
Keywords Photoinduced chemical oscillations, Reaction-diffusion kinetics, Dissipative structures, Polymer-immobilized silver halides, Dispersed semiconductors.

This paper considers photoinduced reaction-diffusion processes in active medium containing polymer-immobilized dispersed semiconductors. The nature of both redox potential and ion concentration oscillations occurring in the microheterogeneous system under irradiation is discussed, and the role of a double electric layer on the surface of the microcompartments in generation and maintenance of electrochemical and concentration gradients is established. Formation of dissipative membranous microstructures within the active medium under light irradiation with the structural and phase inhomogeneity is described and their difference in chemical composition from the surrounding medium is proved to be due to the active redox transformations occurring in them which also involve the polymer matrix components.

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