Effects of indium segregation on optical properties of nitrogen-doped InAs/GaAs quantum dots

2008 ◽  
Vol 104 (10) ◽  
pp. 103532 ◽  
Author(s):  
Tomoya Inoue ◽  
Masataka Mamizuka ◽  
Hiroshi Mizuno ◽  
Osamu Kojima ◽  
Takashi Kita ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Nitrogen Doped

scholarly journals Ultrafast ammonia-driven, microwave-assisted synthesis of nitrogen-doped graphene quantum dots and their optical properties

Nanophotonics ◽  
2017 ◽  
Vol 6 (1) ◽  
pp. 259-267 ◽  
Author(s):  
Binjie Zheng ◽  
Yuanfu Chen ◽  
Pingjian Li ◽  
Zegao Wang ◽  
Bingqiang Cao ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Graphene Quantum Dots ◽  
Microwave Assisted Synthesis ◽  
Scale Production ◽  
Excitation Spectra ◽  
Nitrogen Doped ◽  
Microwave Assisted ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene

AbstractFor the first time, a facile, ultrafast, ammonia-driven microwave-assisted synthesis of high-quality nitrogen-doped graphene quantum dots (NGQDs) at room temperature and atmospheric pressure is presented. This one-step method is very cheap, environment friendly, and suitable for large-scale production. The as-synthesized NGQDs consisting of one to three graphene monolayers exhibit highly crystalline quality with an average size of 5.3 nm. A new fluorescence (FL) emission peak at 390 nm is observed, which might be attributed to the doped nitrogen atoms into the GQDs. An interesting red-shift is observed by comparing the FL excitation spectra to the UV-visible absorption spectra. Based on the optical properties, the detailed Jablonski diagram representing the energy level structure of NGQDs is derived.

scholarly journals Continuous hydrothermal flow synthesis of blue-luminescent, excitation-independent nitrogen-doped carbon quantum dots as nanosensors

2020 ◽  
Vol 8 (6) ◽  
pp. 3270-3279 ◽  
Author(s):  
Ioan-Alexandru Baragau ◽  
Nicholas P. Power ◽  
David J. Morgan ◽  
Tobias Heil ◽  
Richard Alvarez Lobo ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
High Selectivity ◽  
Carbon Quantum Dots ◽  
Environmental Applications ◽  
Flow Synthesis ◽  
First Report ◽  
Nitrogen Doped ◽  
Nitrogen Doped Carbon ◽  
Hydrothermal Flow

We present the first report of continuous hydrothermal flow synthesis of N-doped carbon quantum dots, with excitation-independent optical properties. They display high selectivity and sensitivity for Cr(vi), and are thus suitable for environmental applications and beyond.

Nitrogen-doped graphene quantum dots: Optical properties modification and photovoltaic applications

Nano Research ◽  
2019 ◽  
Vol 12 (5) ◽  
pp. 1041-1047 ◽  
Author(s):  
Md Tanvir Hasan ◽  
Roberto Gonzalez-Rodriguez ◽  
Conor Ryan ◽  
Kristof Pota ◽  
Kayla Green ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Graphene Quantum Dots ◽  
Nitrogen Doped ◽  
Photovoltaic Applications ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene

scholarly journals Differentiating the impact of nitrogen chemical states on optical properties of nitrogen-doped graphene quantum dots

RSC Advances ◽  
2017 ◽  
Vol 7 (76) ◽  
pp. 48263-48267 ◽  
Author(s):  
Timothy Pillar-Little ◽  
Doo Young Kim
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Hydrothermal Treatment ◽  
Graphene Quantum Dots ◽  
Top Down ◽  
Nitrogen Doped ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene ◽  
Chemical States ◽  
The Impact

The optical properties of top-down synthesized oxidized graphene quantum dots (ox-GQDs) and nitrogen-incorporating graphene quantum dots (N-GQDs) along a range of hydrothermal treatment temperatures were observed.

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