Abstract
The class of materials known as conjugated polymers (CP) has attracted great attention due to its optical and semiconductor properties.1 Among CPs, polyaniline (PANI)2 has been found to be a unique material that presents a reversibility character of its conductivity. For example, upon redox and protonation it is possible to change the polymer from an insulating (leucoemeraldine) form, to a conducting polymer (emeraldine salt). Concerning its optical properties, PANI has been attracted interest because of its fast response time.1,3
© 1999 Optical Society of America
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