scholarly journals Ultrafast Method for Selective Design of Graphene Quantum Dots with Highly Efficient Blue Emission

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Suk Hyun Kang ◽  
Sungwook Mhin ◽  
Hyuksu Han ◽  
Kang Min Kim ◽  
Jacob L. Jones ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Graphene Quantum Dots ◽  
Blue Emission ◽  
Highly Efficient

Colorimetric detection of cholesterol based on highly efficient peroxidase mimetic activity of graphene quantum dots

2015 ◽  
Vol 218 ◽  
pp. 42-50 ◽  
Author(s):  
Narsingh R. Nirala ◽  
Shiju Abraham ◽  
Vinod Kumar ◽  
Anushka Bansal ◽  
Anchal Srivastava ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Colorimetric Detection ◽  
Graphene Quantum Dots ◽  
Highly Efficient ◽  
Peroxidase Mimetic

Graphene aerogel-supported and graphene quantum dots-modified γ-MnOOH nanotubes as a highly efficient electrocatalyst for oxygen reduction reaction

RSC Advances ◽  
2016 ◽  
Vol 6 (49) ◽  
pp. 43116-43126 ◽  
Author(s):  
Yisi Liu ◽  
Wenzhang Li ◽  
Jie Li ◽  
Haibo Shen ◽  
Yaomin Li ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Graphene Quantum Dots ◽  
Three Dimensional ◽  
Reduction Reaction ◽  
Graphene Aerogel ◽  
3D Graphene ◽  
Highly Efficient

In this work, we demonstrate a facile strategy to synthesize a novel three-dimensional (3D) graphene aerogel-supported and graphene quantum dots-modified γ-MnOOH nanotubes as a highly efficient electrocatalyst.

Ag-Conjugated graphene quantum dots with blue light-enhanced singlet oxygen generation for ternary-mode highly-efficient antimicrobial therapy

2020 ◽  
Vol 8 (7) ◽  
pp. 1371-1382 ◽  
Author(s):  
Yunjian Yu ◽  
Lin Mei ◽  
Yanmei Shi ◽  
Xinge Zhang ◽  
Kesong Cheng ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Singlet Oxygen ◽  
Blue Light ◽  
Silver Nanoparticle ◽  
Broad Spectrum ◽  
Antimicrobial Therapy ◽  
Graphene Quantum Dots ◽  
Oxygen Generation ◽  
Singlet Oxygen Generation ◽  
Highly Efficient

A broad-spectrum antibacterial system was produced in which silver nanoparticle-conjugated graphene quantum dots were utilised as a blue light-enhanced nanotherapeutic for efficient ternary-mode antimicrobial therapy.

Highly fluorescent nitrogen-doped graphene quantum dots as a green, economical and facile sensor for the determination of sunitinib in real samples

2017 ◽  
Vol 41 (14) ◽  
pp. 6875-6882 ◽  
Author(s):  
H. Mahmood Kashani ◽  
T. Madrakian ◽  
A. Afkhami
Keyword(s):  
Quantum Dots ◽  
Graphene Quantum Dots ◽  
Blue Emission ◽  
High Quantum Yield ◽  
Real Samples ◽  
Nitrogen Doped ◽  
Synthetic Procedure ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene

The preparation of nitrogen-doped graphene quantum dots (N-GQDs), by a simple and inexpensive synthetic procedure, is reported with blue emission and a high quantum yield of 78%.

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.

Sign in / Sign up

Export Citation Format

Share Document