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Electrochromic Behavior of Ionically Self-Assembled Thin Films

Published online by Cambridge University Press:  21 March 2011

J.A. Janik
Affiliation:
Dept. of Physics, Virginia Tech Blacksburg, Va. 24061-0435
J.R. Heflin
Affiliation:
Dept. of Physics, Virginia Tech Blacksburg, Va. 24061-0435
D. Marciu
Affiliation:
Luna Innovations, P.O. Box 11704 Blacksburg, Va. 24062
M.B. Miller
Affiliation:
Luna Innovations, P.O. Box 11704 Blacksburg, Va. 24062
R.M. Davis
Affiliation:
Dept. of Chemical Engineering, Virginia Tech Blacksburg, Va. 24061-0211
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Abstract

Ionically self-assembled monolayers (ISAMs), fabricated by alternate adsorption of cationic and anionic components, yield exceptionally homogeneous thin films with sub- nanometer control of the thickness and relative spatial location of the component materials. Using organic electrochromic materials such as polyaniline, we report studies of electrochromic responses in ISAM films. Reversible changes in the absorption spectrum are observed with the application of voltages on the order of 1.0 V. Measurements are made using both liquid electrolytes and in all-solid state devices incorporating solid polyelectrolytes such as poly(2- acylamido 2-methyl propane sulfonic acid) (PAMPS).

Type
Research Article
Copyright
Copyright © Materials Research Society 2001

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References

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