Fabrication and Characterization of an Ammonia Gas Sensor Based on PEDOT-PSS With N-Doped Graphene Quantum Dots Dopant

2016 ◽  
Vol 16 (16) ◽  
pp. 6149-6154 ◽  
Author(s):  
Mahdieh Hakimi ◽  
Alireza Salehi ◽  
Farhad A. Boroumand
Keyword(s):  
Quantum Dots ◽  
Gas Sensor ◽  
Graphene Quantum Dots ◽  
Ammonia Gas ◽  
Doped Graphene ◽  
Fabrication And Characterization

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

2016 ◽  
Vol 2016 ◽  
pp. 1-6 ◽  
Author(s):  
Lam Minh Long ◽  
Nguyen Nang Dinh ◽  
Tran Quang Trung
Keyword(s):  
Quantum Dots ◽  
Atmospheric Pressure ◽  
Graphene Quantum Dots ◽  
Composite Films ◽  
Fast Response ◽  
Bulk Heterojunctions ◽  
Humidity Sensing ◽  
Best Value ◽  
Doped Graphene

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.

Zero-dimensional heterostructures: N-doped graphene dots/SnO2 for ultrasensitive and selective NO2 gas sensing at low temperatures

2020 ◽  
Vol 8 (23) ◽  
pp. 11734-11742
Author(s):  
Rahul Purbia ◽  
Yeong Min Kwon ◽  
Hong-Dae Kim ◽  
Yun Sik Lee ◽  
Heungjoo Shin ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Gas Sensor ◽  
Low Temperatures ◽  
Gas Sensing ◽  
Graphene Quantum Dots ◽  
High Sensitivity ◽  
Facile Synthesis ◽  
Doped Graphene ◽  
Excellent Selectivity

Facile synthesis of zero-dimensional heterostructures consisting of N-doped graphene quantum dots (N-GDs) and SnO2 nanoparticles is reported for the NO2 gas sensor with high sensitivity and excellent selectivity.

Sign in / Sign up

Export Citation Format

Share Document