A new optical photochemical memory device in a light-sensitive chemical active medium

Details A new optical photochemical memory device in a light-sensitive chemical active medium A new optical photochemical memory device in a light-sensitive chemical active medium

Jan 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986natur.319..393k&link_type=abstract

Nature (ISSN 0028-0836), vol. 319, Jan. 30, 1986, p. 393, 394.

Computer Science

89

Optical Memory (Data Storage), Photochemical Reactions, Radiation Chemistry, Bromides, Catalysts, Distributed Parameter Systems, Light Modulation, Phase Shift, Rubidium

Scientific paper

By using Ru(bpy)3(2+) as catalyst for the Belousov-Zhabotinsky reaction a light-sensitive chemical active medium is obtained which makes it possible to control the propagating effects and to manipulate the character of the wave phenomena photochemically. In the reaction, the reduction of the oxidized catalyst by a brominated organic species produces bromide ions, which in turn inhibit the autocatalytic oxidation of the catalyst. Oscillations occur as the bromide production is coupled with the main catalyst oxidizing reaction as a delayed inhibitor production. The photochemically excited catalyst, however, produces the inhibitor bromide directly. In the distributed oscillating system used, color change accompanies the phase change. The oscillating reaction starts at the wall of a Petri dish, moves as a phase wave of well-defined constant frequency to the middle point and then vanishes. By taking advantage of the action of light, the conditions can be changed spatially, allowing the system to store time-impressed optical information and to process this information in some oscillating cycles as a dynamically working memory device.

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