|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Functional Nanomaterials: Functional Low-Dimensional (0D, 1D, 2D) Materials 2022
||Suspended Graphene/PEDOT:PSS Channel for H2 Gas Sensing Fabricated Using Direct-write Functional Fibers
||Abiral Regmi, Noori Na, Jiyoung Chang
|On-Site Speaker (Planned)
This work investigates on the hydrogen sensing mechanism of suspended graphene channel precisely patterned to nanoscale regime with near-field electrospinning of Poly(3,4-ethylenedioxythiophene): Poly(styrenesulfonate): Polyethylene oxide (PEDOT: PSS: PEO or PPP) fibers. The PPP fibers can not only act as an etch mask to pattern the suspended graphene channel to desired width but also tune graphene’s electrical property by introducing a doping effect. The suspended graphene/PPP nanoscale channels so produced have higher surface to volume ratio which provides larger area for gas molecules adsorption. Furthermore, the graphene/PPP assembly has shown higher specificity towards H2 gas molecules with respect to graphene or PEDOT:PSS alone. The sensor response is characterized at various conditions such as channel dimensions, temperature, gas concentrations, etc. The ultra-low power consumption capability and miniature size of the sensor make it ideal for sensing application. The results thus promise a simple and low-cost suspended graphene/PPP sensor with enhanced sensitivity.
||Polymers, Nanotechnology, Thin Films and Interfaces