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

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.

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Characterization of Humidity Sensing of Polymeric Graphene-Quantum-Dots composites incorporated with silver nanowires

VNU Journal of Science Mathematics - Physics ◽

10.25073/2588-1124/vnumap.4216 ◽

2017 ◽

Vol 33 (3) ◽

Author(s):

Dinh Nguyen Nang ◽

Lam Minh Long ◽

Hoang Thi Thu ◽

Huynh Tri Phong ◽

Tran Quang Trung

Keyword(s):

Quantum Dots ◽

Relative Humidity ◽

Room Temperature ◽

Silver Nanowires ◽

Graphene Quantum Dots ◽

Composite Films ◽

Bulk Heterojunctions ◽

Humidity Sensing ◽

Best Value

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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Atmospheric pressure synthesis of nitrogen doped graphene quantum dots for fabrication of BiOBr nanohybrids with enhanced visible-light photoactivity and photostability

Carbon ◽

10.1016/j.carbon.2015.10.068 ◽

2016 ◽

Vol 96 ◽

pp. 1157-1165 ◽

Cited By ~ 56

Author(s):

Yuanyuan Yin ◽

Qian Liu ◽

Ding Jiang ◽

Xiaojiao Du ◽

Jing Qian ◽

...

Keyword(s):

Quantum Dots ◽

Visible Light ◽

Atmospheric Pressure ◽

Graphene Quantum Dots ◽

Nitrogen Doped ◽

Nitrogen Doped Graphene ◽

Doped Graphene ◽

Pressure Synthesis ◽

Atmospheric Pressure Synthesis

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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

RSC Advances ◽

10.1039/c5ra08158k ◽

2015 ◽

Vol 5 (71) ◽

pp. 57559-57567 ◽

Cited By ~ 44

Author(s):

Jaber Nasrollah Gavgani ◽

Hamed Sharifi Dehsari ◽

Amirhossein Hasani ◽

Mojtaba Mahyari ◽

Elham Khodabakhshi Shalamzari ◽

...

Keyword(s):

Quantum Dots ◽

Organic Compound ◽

Volatile Organic Compound ◽

Room Temperature ◽

Graphene Quantum Dots ◽

Fast Response ◽

Volatile Organic ◽

Doped Graphene ◽

Response And Recovery ◽

Voc Sensor

A highly efficient VOC sensor based on N-doped graphene quantum dots (N-GQDs)/poly(3,4-ethylenedioxythiophene)–poly(styrenesulfonate) (PEDOT–PSS) was fabricated at room temperature.

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