Thermochromic effect in synthetic opal/polyaniline composite structures

Rahman, F. and Khokhar, A.Z. (2008) Thermochromic effect in synthetic opal/polyaniline composite structures. Applied Physics A: Materials Science and Processing, 94(2), pp. 405-410. (doi: 10.1007/s00339-008-4822-6)

Abstract

The design and construction of a novel storage/indicator bilayer system is described where ammonia gas stored in a porous material can be used to dope a colour-changing polyaniline film. Both reversible and irreversible colour change effects are possible. A thin synthetic opal film is coupled to a polyaniline film in a parallel plate glass cell with ammonia gas adsorbed on the silica balls that form the opal structure. When heated and cooled, ammonia reversibly exchanges between the opal and polyaniline films causing a very distinct change in the colour of the polyaniline film. This thermochromic effect is also electrically detectable because of the large concomitant change in the resistivity of the polyaniline film that accompanies its colour change

• Item Type: Articles
• Keywords: ARRAYS CONDUCTING POLYMER CONJUGATED POLYMERS FABRICATION FILMS POLYANILINE POLYMER GAS SENSORS POLYPYRROLE POROUS-MEDIA SYSTEM VAPORS
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Khokhar, Dr Ali and Rahman, Dr Faiz
• Authors: Rahman, F., and Khokhar, A.Z.
• College/School: College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
• Journal Name: Applied Physics A: Materials Science and Processing
• ISSN: 0947-8396