In situchemically polymerised polyaniline nanolayer: characterisation and sensing materials

Abstract

An experiment has been carried out to study the formation and characterisation of polyaniline (PANi) nanolayer growth directly on glass and alumina substrate by in situ chemical polymerisation. It has been found that the growth mode of the PANi nanolayer depends on the synthesis time and mechanical agitation. The difference in growth modes results in the form of granular, planar or fibrillar structure and then affects the chemical and electronic structure of the PANi nanolayer. As a result of gas-PANi chain interaction the resistance of the PANi nanolayer is highly sensitive to a variety of gases in environment such as oxygen (oxidising agent), NH 3 (reducing agent) and so forth. The feature enables PANi nanolayer made by in situ chemical polymerisation, a promising candidate for gas sensing materials.

Light sensitivity in PANi/TiO2 double nanolayer

“…As a result, the materials has shown a variety of potential applications such as lightweight battery electrodes, electro-magnetic shielding devices, anticorrosion coatings, and sensors [3,7]. In order to enhance the application, coupling PANi with suitable nanostructures is usually used as effective approaches to modify the electronic structure of PANi or design new useful features [8,9]. Titanium dioxide (TiO2) is a typical metal oxide and belongs to n-type wide bandgap semiconductor group.…”