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Amplification of Changes of a Thin Film's Macromolecular Structure into Macroscopic Reaction--Diffusion Patterns.

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Bibliographic Details
Title: Amplification of Changes of a Thin Film's Macromolecular Structure into Macroscopic Reaction--Diffusion Patterns.
Authors: Bitner, Agnieszka1, Fialkowski, Marcin1, Smoukov, Stoyan K.1, Campbell, Christopher J.1, Grzybowski, Bartosz A.1 grzybor@northwestern.edu
Source: Journal of the American Chemical Society. 5/18/2005, Vol. 127 Issue 19, p6936-6937. 2p.
Subjects: Thin films, Gelatin, Solution (Chemistry), Macromolecules, Semiconductor doping, Reaction-diffusion equations, Supramolecular chemistry
Abstract: This article cites a study of a system in which relatively small changes in the material properties, such as water absorptivity, of a thin gelatin film undergoing a phase transition are amplified and translated into color patterns by reaction-diffusion (RD). The RD process is initiated from a network of connected microfeatures placed onto the film. In the study, a series of ionically doped gelatin solutions were prepared by first dissolving fixed amounts of gelatin in 27 ml of deionized water, heating for 30 minutes at temperature ranging from 30 to 65 degree centigrade, adding 0.3 g of potassium hexacyanoferrate, to each solution, and heating for another 10 min. Based on results, it is suggested that micronetwork RD systems similar to the one described here might be useful in rapid assessment of absorptivities of other materials, likely using different indicator/ink pairs and possibly with different solvents.
Database: Engineering Source
Description
Abstract:This article cites a study of a system in which relatively small changes in the material properties, such as water absorptivity, of a thin gelatin film undergoing a phase transition are amplified and translated into color patterns by reaction-diffusion (RD). The RD process is initiated from a network of connected microfeatures placed onto the film. In the study, a series of ionically doped gelatin solutions were prepared by first dissolving fixed amounts of gelatin in 27 ml of deionized water, heating for 30 minutes at temperature ranging from 30 to 65 degree centigrade, adding 0.3 g of potassium hexacyanoferrate, to each solution, and heating for another 10 min. Based on results, it is suggested that micronetwork RD systems similar to the one described here might be useful in rapid assessment of absorptivities of other materials, likely using different indicator/ink pairs and possibly with different solvents.
ISSN:00027863
DOI:10.1021/ja051128p