Highly Selective Polyene-Polyyne Resistive Gas Sensors: Response Tuning by Low-Energy Ion Irradiation

The formation of polyene-polyyne-based nanocomposites by dehydrohalogenation the drop-cast-deposited polyvinylidene fluoride, assessment and ion-induced tailoring their gas sensing properties are reported. investigated structure was analyzed scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy, transmission Fourier-transform infrared revealing thickness-dependent incomplete dehydrofluorination its porosity induced KOH treatment. polyene-polyyne structures modified low-energy Ar+ were studied SEM Raman which showed morphology variation, shortening chains graphitization samples. resistive samples at room temperature, selective ammonia vapor non-irradiated sample enhancement for ethanol water after ion irradiation. With dose enlargement, change in response from electrical conductivity increase to decrease observed ethanol, allowing us discuss origin tunability mechanism