Characterization of Humidity Sensing of Polymeric Graphene-Quantum-Dots Composites Incorporated with Silver Nanowires

Graphene quantum dots (GQDs) were synthesized and incorporated with polyethylenedioxythiophene:poly(4-styrenesulfonate) (PEDOT:PSS), Ag nanowires (AgNWs) to form a composite that can be used for enhancement of relative humidity (RH%) sensing. The composite films contained bulk heterojunctions of AgNW/GQD and AgNW/PEDOT:PSS. The sensors made from the composites responded well to relative humidity in a range from 10% to 50% at room temperature. With an AgNWs content ranging from 0.2 wt.% to 0.4 wt.% and 0.6 wt.%, the sensitivity of the relative humidity sensing devices based on AgNWs-doped GQDs+PEDOT:PSS composites was increased from 5.5% to 6.5 % and 15.2 %, respectively. The response time of the composite sensors was much improved due to AgNWs doping in the composites. For the 0.6 wt.% AgNWs-doped GQDs+PEDOT:PSS films, the best value of the recovery time was found to be of 30 s.

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Miền Giá trị
Tác giả Lam Minh Long, Nguyen Nang Dinh, Hoang Thi Thu, Huynh Tri Phong, Tran Quang Trung
Người bảo dưỡng Đại học Quốc gia Hà Nội
Last Updated Tháng 8 16, 2018, 10:05 (ICT)
Được tạo ra Tháng 4 10, 2018, 15:57 (ICT)