Abstract
Microgel particles of poly(2-vinylpyridine) cross linked with 0.5 wt% divinylbenzene were synthesised. Due to differences in the scattering of light, a dispersion of the particles appears opaque milky white above pH 4.5 and transparent below pH 4.5. The pH of a 0.15 wt% dispersion was modified using a poly(aniline) film as a source/sink of protons and a Ag/AgCl electrode as a source/sink of chloride counterions. The absorption of the sample at 400 nm was typically reduced from c.a. 3.5 to c.a. 0.5 in less than 20 minutes and increased to c.a. 3.2 in less than 20 minutes. This system could form the basis for a new type of display device, but it is insufficiently fast or consistent in its current form.
Similar content being viewed by others
References
B.R. Saunders and B. Vincent, J. Chem. Soc. Faraday T. 92, 3385 (1996).
T. Sawai, H. Shinohara, Y. Ikariyama, M. Aizawa, J. Electroanal. Chem. 297, 399 (1991).
T. Sawai, H. Shinohara, Y. Ikariyama, M. Aizawa, J. Electroanal. Chem. 283, 221 (1990).
J.P. Cook and D.J. Riley, Adv. Colloid Interfac. (in press).
R. Greef, M. Kalaji, L.M. Peter, Faraday Discuss. 88, 277 (1989).
G.J. Janz, in Reference Electrodes: Theory and Practice, edited by D.J.G. Ives and G.J Janz (Academic Press, New York, 1961), p179.
J.-C. Chiang, A.G. MacDiarmid, Synthetic Met. 13, 193 (1986).
D. Orata, D.A. Buttry, J. Am. Chem. Soc. 109, 3574, (1987).
J. Yin, D. Dupin, J. Li, S.P. Armes, S. Liu, Langmuir 24, 9334 (2008).
D. Dupin, J. Rosselgong, S.P. Armes, A.F. Routh, Langmuir 23, 4035 (2007).
T. Sawai, S. Yamazaki, Y. Ishigami, Y. Ikariyama, M. Aizawa, J. Electroanal. Chem. 322, 1 (1992).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Joseph, P.C., Riley, J.D. A New Type of Display Device Based on Remote Swelling and Collapse of a pH-Responsive Microgel. MRS Online Proceedings Library 1134, 814 (2008). https://doi.org/10.1557/PROC-1134-BB08-14
Received:
Accepted:
Published:
DOI: https://doi.org/10.1557/PROC-1134-BB08-14