Synthesis and Characterization of Ag/PEDOT:PSS Films Used for NH\(_3\) Selective Sensing

Nguyen Nang Dinh, Lam Minh Long, Hoang Thi Thu, Huynh tran My Hoa, Tran Quang Trung


Nano-Ag/PEDOT-PSS films were prepared by spin-coating technique. SEM surface morphology, Raman spectra and gas sensing of methanol, humidity and NH3 were studied. The obtained results showed that the resistance of Ag/PEDOT:PSS sheets exposed to gases related to the generation of electrons from the gases adsorption that eliminated holes as the major carriers in PEDOT:PSS. For NH3 gas the largest change of the resistance of Ag/PEDOT:PSS was observed. The less sensitivity of humidity and ethanol sensing was explained due to less dedoping reaction between H2O and ethanol vapor with Ag/PEDOT:PSS, respectively. This suggests a potential application of the nano-Ag/PEDOT-PSS sensors for  the selective monitoring NH3 gas in environment.


PEDOT:PSS film; Raman spectra; gas sensing; NH3 gas sensors.

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