Response of PANI-defect one-dimensional photonic crystals to acidic/alkali vapor

This paper describes the introduction of a planar polyaniline (PANI) defect layer within SiO2/graphene oxide (GO) one dimensional photonic crystal (1DPC) for the elaboration of tunable photonic crystal acidic/alkali vapor sensors with enhanced optical properties. The response result can be easily captured by the naked eye through a change in structural color.