In this study, polypyrrole modified with Pt nanoparticles (Ppy-Pt) and generation 1 polyamidoamone dendrimer-Au nanoparticles (G1-NH2-AuNPs) were used to fabricate flexible gas sensor and flexible humidity sensors by Layer-by-layer self-assemble and drop-coating on plastic substrate, respectively. Then using atomic force microscopy (AFM) and scanning electron microscopy (SEM) to analysis the surface structure of Ppy-Pt and G1-NH2-AuNPs flexible nanocomposite film.
The novel flexible H2 gas sensor was successfully fabricated by the layer-by-layer in situ self-assembly of a Pt-PPy thin film on a modified PET substrate. It had high sensitivity, fast response and recovery time, and long-term stability.
The flexible impedance-type humidity sensor that was based on G1-NH2-AuNPs film had a wide working range of humidity, a small hysteresis, a fast response time, high flexibility, and good long-term stability.
