Characterization of Humidity Sensing of Polymeric Graphene-Quantum-Dots composites incorporated with silver nanowires
Main Article Content
Abstract
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.
Keywords:
Graphene quantum dots (GQDs), Ag-nanowires (AgNWs), nanocomposite, humidity sensing
References
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[5] A. J. Нeeger, Semiconducting and metallic polymers: the fourth generation of polymeric materials. Synth Metals. (2002) 123 23–42.
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[7] S.-I. Na, S.-S. Kim, J. Jo, D.-Y. Kim, Efficient and flexible ITO-free organic solar cells using. Adv. Mater. (2008) 20 4061–4068.
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[14] Lam Minh Long, Nguyen Nang Dinh, Tran Quang Trung, Synthesis and Characterization of Polymeric Graphene-Quantum-Dots based Nanocomposites for Humidity Sensing, J. Nanomat. Vol. 2016 (2016) Article ID 5849018, 6 p.
[15] W. Xing, J. Hu, S.-C. Kung, K. C. Donavan, W. Yan, R. Wu, R. M. Penner, A Chemically-Responsive Nanojunction within a Silver Nanowire, Nano Lett. (2012), 12/3 1729–1735.
[16] Tran Quang Trung, Tran My Hoa Huynh, Duc Tai Tong, Tran Van Tam, Nguyen Nang Dinh, Synthesis and application of graphene–silver nanowires composite for ammonia gas sensing, Adv. Nat. Sci.: Nanosci. Nanotechnol. (2013) 4 045012 (4p.).
[17] J. Quyang, C.-W. Chu, F.-C. Chen, Q. Xu, Y. Yang, High-Conductivity Poly(3,4-ethylenedioxythiophene):Poly(styrene sulfonate) Film and Its Application in Polymer Optoelectronic Devices, Adv. Funct. Mater. (2005) 15 203–208.
[18] J. N. Gavgani, H. S. Dehsari, A. Hasani, M. Mahyari, E. K. Shalamzari, A.Salehi, F. A. Taromi, A room temperature volatile organic compound sensor with enhanced performance, fast response and recovery based on N-doped graphene quantum dots and poly(3,4-ethylenedioxythiophene)–poly(styrenesulfonate) nanocomposite, Royal Soc. of Chem. (2015) 5, 57559–57567.