tailieunhanh - Synthesis and characterization of ag/pedot:PSS films used for NH3 selective sensing

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. | Communications in Physics, Vol. 26, No. 2 (2016), pp. 173-180 DOI: SYNTHESIS AND CHARACTERIZATION OF Ag/PEDOT:PSS FILMS USED FOR NH3 SELECTIVE SENSING LAM MINH LONG AND NGUYEN NANG DINH† University of Engineering and Technology, Vietnam National University Hanoi, 144 Xuan Thuy, Hanoi, Vietnam HOANG THI THU, HUYNH TRAN MY HOA AND TRAN QUANG TRUNG University of Natural Science, Vietnam National University, Ho Chi Minh City 227 Nguyen Van Cu Road, District 5, Ho Chi Minh City † E-mail: dinhnn@ Received 15 July 2016 Accepted for publication 18 August 2016 Abstract. 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 H2 O 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. Keywords: PEDOT:PSS film; Raman spectra; gas sensing; NH3 gas sensors. Classification numbers: ; ; ; . I. INTRODUCTION Nanocomposites are known as materials mixing two or more different materials, where at least one of these having a nano-dimensional phase, for example, conducting polymers embedded with metallic, semiconducting, and dielectric nanoparticles. In comparison with devices made from standard materials, the nanocomposites-based devices usually possess enhanced efficiency and service life [1–4]. If metallic nanoparticles are embedded in the conducting polymer, new active sites are generally created for

• Vật lý
• Communications in Physics
• Synthesis and characterization of ag pedot
• PSS films used for NH3 selective sensing
• PEDOTPSS film
• The selective monitoring NH3 gas
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