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Synthesis and Characterization of Polymeric Graphene-Quantum-Dots based Nanocomposites for Humidity Sensing

Minh Long Lam and Nang Dinh Nguyen and Quang Trung Tran (2016) Synthesis and Characterization of Polymeric Graphene-Quantum-Dots based Nanocomposites for Humidity Sensing. J. Nanomaterials, 2016 . ISSN 1687-4129

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Abstract

Graphene quantum dots (GQDs) were synthesized and incorporated with polyethylenedioxythiophene: poly(4-styrenesulfonate) (PEDOT:PSS) and carbon nanotube (CNT) to form a composite that can be used for humidity sensors. The 600 nm-thick composite films contained bulk heterojunctions of CNT/GQD and CNT/PEDOT:PSS. The sensors made from the composites responded well to humidity in a range from 60 to 80% at room temperature and atmospheric pressure. With a CNT content of 0.4 wt.% (GPC-1) to 0.8 wt.% (GPC-2) and 1.2 wt.% (GPC-3), the sensitivity of the humidity sensing devices based on CNT-doped graphene quantum dot-PEDOT:PSS composites was increased from 4.5% (GPC-1) to 9.0 % (GPC-1) and 11.0 % (GPC-2), respectively. The fast response time of the GPC sensors was about 20 s and it was much improved due to CNTs doping in the composites. The best value of the recovery time was found to be of 40 s, for the GPC composite film doped with 1.2 wt.% CNT content.

Item Type:Article
Subjects:Engineering Physics
ISI/Scopus-indexed journals
Divisions:Faculty of Engineering Physics and Nanotechnology (FEPN)
ID Code:2004
Deposited By: Nguy�n N
Deposited On:08 Dec 2016 03:40
Last Modified:08 Dec 2016 03:40

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