Fabrication and Characterization of Free-Standing and Flexible Polyaniline Membranes: Role of Graphene Nanoscrolls

Wearable technologies can contribute to the early and accurate detection of chronic diseases which be achieved by integration biosensors into wearable technologies. However, challenges associated with performance current electrode materials—i.e., flexibility, conductivity, mechanical stability, made from conducting polymers are preventing their widespread usage. Herein, we report a freestanding flexible synthesized polyaniline (PANI) graphene nanoscrolls (GNS). The PANI-GNS nanohybrid membranes were via chemical oxidative polymerization characterized scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), nanoindentation (NI), four-point probe techniques. FTIR results showed an increase in conjugation length PANI after addition GNS mixture indicative enhancement electrical properties. Nanoindentation studies elastic modulus hardness 2.6 GPa 0.17 GPa, respectively, for PANI-GNS-5 nanocomposite, compared 1.9 0.08 pure PANI. This was later confirmed technique as increased conductivity electrodes up 9 S/cm at 5% weight ratio. Moreover, SEM open porous morphology polymer matrix comparison samples would readily translate higher amounts enzyme immobilization on surface.