A general route to enhance the fluorescence of graphene quantum dots by Ag nanoparticles

RSC Advances ◽  
2014 ◽  
Vol 4 (42) ◽  
pp. 21772-21776 ◽  
Author(s):  
Chenxin Ran ◽  
Minqiang Wang ◽  
Weiyin Gao ◽  
Zhi Yang ◽  
Jinyou Shao ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Yield ◽  
Ag Nanoparticles ◽  
Atmospheric Pressure ◽  
Solvothermal Method ◽  
Graphene Quantum Dots

Graphene quantum dots (GQDs)/Ag nanoparticles with an unexpected quantum yield of 16.3% are synthesized by an efficient simple solvothermal method at atmospheric pressure.

Ultrafast spontaneous emission modulation of graphene quantum dots interacting with Ag nanoparticles in solution

2016 ◽  
Vol 109 (2) ◽  
pp. 021905 ◽  
Author(s):  
Jianwei Zhao ◽  
Jian Lu ◽  
Liang Wang ◽  
Linfan Tian ◽  
Xingxia Deng ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Spontaneous Emission ◽  
Ag Nanoparticles ◽  
Graphene Quantum Dots ◽  
Emission Modulation

Ultra-bright alkylated graphene quantum dots

Nanoscale ◽  
2014 ◽  
Vol 6 (21) ◽  
pp. 12635-12643 ◽  
Author(s):  
Lan Feng ◽  
Xing-Yan Tang ◽  
Yun-Xin Zhong ◽  
Yue-Wen Liu ◽  
Xue-Huan Song ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Yield ◽  
Graphene Quantum Dots

Alkylated graphene quantum dots with negligible oxygen-containing groups exhibit pH-independent and ultra-bright PL with a quantum yield of up to 65%.

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.

A reformative oxidation strategy using high concentration nitric acid for enhancing the emission performance of graphene quantum dots

RSC Advances ◽  
2014 ◽  
Vol 4 (89) ◽  
pp. 47977-47981 ◽  
Author(s):  
Taili Shao ◽  
Guodong Wang ◽  
Xuting An ◽  
Shujuan Zhuo ◽  
Yunsheng Xia ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Nitric Acid ◽  
Quantum Yield ◽  
Graphene Quantum Dots ◽  
High Concentration ◽  
Emission Performance

Red fluorescent graphene quantum dots with 18% quantum yield at 600 nm were obtained through a concentrated HNO3oxidation strategy.

scholarly journals Effect of plasma polarity on the synthesis of graphene quantum dots by atmospheric-pressure microplasmas

2020 ◽  
Vol 31 (48) ◽  
pp. 485001
Author(s):  
Thomas Orriere ◽  
Darwin Kurniawan ◽  
Yi-Chen Chang ◽  
David Z Pai ◽  
Wei-Hung Chiang
Keyword(s):  
Quantum Dots ◽  
Atmospheric Pressure ◽  
Graphene Quantum Dots

Sustainable synthesis of single crystalline sulphur-doped graphene quantum dots for bioimaging and beyond

2018 ◽  
Vol 20 (18) ◽  
pp. 4245-4259 ◽  
Author(s):  
Sujata Sangam ◽  
Apoorv Gupta ◽  
Adeeba Shakeel ◽  
Rohan Bhattacharya ◽  
Arun Kumar Sharma ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Yield ◽  
Graphene Quantum Dots ◽  
Hydrothermal Route ◽  
Single Crystalline ◽  
Doped Graphene

Waste-driven single crystalline sulphur-doped GQDs are synthesized via a green hydrothermal route with the highest quantum yield and excellent biocompatibility for bioimaging.

Electrochemical immunosensor using nanotriplex of graphene quantum dots, Fe3O4, and Ag nanoparticles for tuberculosis

2018 ◽  
Vol 290 ◽  
pp. 369-377 ◽  
Author(s):  
Lemma Teshome Tufa ◽  
Sangjin Oh ◽  
Van Tan Tran ◽  
Jeonghyo Kim ◽  
Ki-Jae Jeong ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Ag Nanoparticles ◽  
Graphene Quantum Dots ◽  
Electrochemical Immunosensor
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