Luminescent Polymer Composite Films Containing Coal-Derived Graphene Quantum Dots

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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Quantum dots - Polymer composites and the influence of gold nanoparticles on photoluminescence of polymer composite films

Journal of Luminescence ◽

10.1016/j.jlumin.2019.116992 ◽

2020 ◽

Vol 220 ◽

pp. 116992 ◽

Cited By ~ 2

Author(s):

A.A. Ezhov ◽

O.N. Karpov ◽

A.S. Merekalov ◽

S.S. Abramchuk ◽

G.N. Bondarenko ◽

...

Keyword(s):

Quantum Dots ◽

Gold Nanoparticles ◽

Polymer Composites ◽

Polymer Composite ◽

Composite Films

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Metal-enhanced fluorescence in polymer composite films with Au@Ag@SiO2 nanoparticles and InP@ZnS quantum dots

RSC Advances ◽

10.1039/c8ra08802k ◽

2019 ◽

Vol 9 (1) ◽

pp. 224-233 ◽

Cited By ~ 6

Author(s):

Ki-Se Kim ◽

Maulida Zakia ◽

Jinhwan Yoon ◽

Seong Il Yoo

Keyword(s):

Quantum Dots ◽

Polymer Composites ◽

Polymer Composite ◽

Composite Films ◽

Sio2 Nanoparticles ◽

Enhanced Fluorescence ◽

Metal Enhanced Fluorescence

Poly(lauryl methacrylate) films containing Au@Ag@SiO2 nanoparticles and InP@ZnS quantum dots were prepared to investigate metal-enhanced fluorescence in polymer composites.

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