scholarly journals Laser wavelength modulated pulsed laser ablation for selective and efficient production of graphene quantum dots

RSC Advances ◽  
2019 ◽  
Vol 9 (24) ◽  
pp. 13658-13663 ◽  
Author(s):  
Sukhyun Kang ◽  
Jeong Ho Ryu ◽  
Byoungsoo Lee ◽  
Kyung Hwan Jung ◽  
Kwang Bo Shim ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Laser Ablation ◽  
Biomedical Applications ◽  
Graphene Quantum Dots ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Laser Wavelength ◽  
Efficient Production ◽  
Laser Ablation In Liquid ◽  
Graphene Oxide Quantum Dots

Graphene quantum dots (GQDs) and graphene oxide quantum dots (GOQDs) can be selectively produced by wavelength-modulated pulsed laser ablation in liquid (PLAL) method, which can used in different applications such as optoelectronic and biomedical applications, respectively.

scholarly journals Transforming Carbon Black into Graphene Oxide Quantum Dots by Pulsed Laser Ablation in Ethanol

2020 ◽  
Vol 58 (11) ◽  
pp. 808-814
Author(s):  
Jung-Il Lee ◽  
Jeong Ho Ryu
Keyword(s):  
Quantum Dots ◽  
Graphene Oxide ◽  
Laser Ablation ◽  
Carbon Black ◽  
Graphene Quantum Dots ◽  
Pulsed Laser ◽  
Blue Emission ◽  
Pulsed Laser Ablation ◽  
Absorption Bands ◽  
Graphene Oxide Quantum Dots

Graphene oxide quantum dots (GOQDs) are nanometer-sized graphene oxide fragments that exhibit unique properties, making them interesting candidates for a range of new applications. Carbon black, one of the commercially available carbon precursors, is produced by the thermal decomposition or incomplete combustion of organic compounds. It is commonly used as a supporting material for catalysts because of its excellent electrical conductivity, high surface area, and stability. In this paper, we report the transformation of carbon black into GOQDs in 10 min using a one-step facile approach. This transformation was achieved by pulsed laser ablation (PLA) in ethanol using the earth-abundant and low-cost carbon black as precursor. Only ethanol and carbon black were used for the transformation. The carbon clusters ablated from the carbon black were completely transformed into GOQDs with a homogeneous size distribution and heights in the range of 0.3-1.7 nm. This confirmed that the transformed GOQDs consisted of only single- or few-layered graphene quantum dots. The UV-vis spectra showed absorption bands at 215, 260, and 320 nm, which were attributed to the π→π* transition of the C=C of the sp<sup>2</sup> C bond in the sp<sup>3</sup> C matrix. A distinct blue emission peak at 450 nm was evident at an excitation wavelength of 360 nm. The broader PL emission spectra are due to the oxygen-related functional groups emitting PL between 300 and 440 nm.

Synthesis of N-doped graphene quantum dots by pulsed laser ablation with diethylenetriamine (DETA) and their photoluminescence

2017 ◽  
Vol 19 (33) ◽  
pp. 22395-22400 ◽  
Author(s):  
S. R. M. Santiago ◽  
T. N. Lin ◽  
C. H. Chang ◽  
Y. A. Wong ◽  
C. A. J. Lin ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Laser Ablation ◽  
Graphene Quantum Dots ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Doped Graphene ◽  
One Step

We report a facile, fast, and one-step approach to prepare N-doped graphene quantum dots (GQDs) using pulsed laser ablation with diethylenetriamine (DETA).

scholarly journals One-step synthesis of sulfur-incorporated graphene quantum dots using pulsed laser ablation for enhancing optical properties

2020 ◽  
Vol 28 (15) ◽  
pp. 21659 ◽  
Author(s):  
Sukhyun Kang ◽  
Young Kyu Jeong ◽  
Kyung Hwan Jung ◽  
Yong Son ◽  
Won Rae Kim ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Laser Ablation ◽  
Graphene Quantum Dots ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
One Step

Pulsed laser ablation based synthetic route for nitrogen-doped graphene quantum dots using graphite flakes

2020 ◽  
Vol 506 ◽  
pp. 144998 ◽  
Author(s):  
Sukhyun Kang ◽  
Young Kyu Jeong ◽  
Jeong Ho Ryu ◽  
Yong Son ◽  
Won Rae Kim ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Laser Ablation ◽  
Graphene Quantum Dots ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Synthetic Route ◽  
Nitrogen Doped ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene

scholarly journals Simple preparation of graphene quantum dots with controllable surface states from graphite

RSC Advances ◽  
2019 ◽  
Vol 9 (66) ◽  
pp. 38447-38453 ◽  
Author(s):  
Sukhyun Kang ◽  
Young Kyu Jeong ◽  
Kyung Hwan Jung ◽  
Yong Son ◽  
Sung-Churl Choi ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Graphene Oxide ◽  
Graphene Quantum Dots ◽  
Pulsed Laser ◽  
Surface States ◽  
Pulsed Laser Ablation ◽  
Ablation Process ◽  
Laser Ablation Process ◽  
Simple Preparation ◽  
Graphene Oxide Quantum Dots

The proposed technique enables selectively producing graphene quantum dots (on-GQDs) and graphene oxide quantum dots (off-GOQDs) by depending on the applying sonication during the pulsed laser ablation process.

Sign in / Sign up

Export Citation Format

Share Document