Results 21 to 30 of about 60,665 (288)

Fluorescent Quantum Dots and Its Composites for Highly Sensitive Detection of Heavy Metal Ions and Pesticide Residues: A Review

open access: yesChemosensors, 2023
Quantum dots nanomaterials have attracted extensive interest for fluorescence chemical sensors due their attributes, such as excellent optical characteristics, quantum size effects, interface effects, etc. Moreover, the fluorescence properties of quantum
Zhezhe Wang   +4 more
doaj   +1 more source

Graphene Quantum Dots

open access: yesParticle & Particle Systems Characterization, 2013
Graphene quantum dots (GQDs) are nanometer‐sized fragments of graphene that show unique properties, which makes them interesting candidates for a whole range of new applications. This review article gives an overview of the synthesis, properties and applications of GQDs. Synthesis methods discussed include top‐down and bottom‐up approaches.
Mitchell Bacon   +2 more
openaire   +3 more sources

Nanomaterials 2021 Best Paper Awards: Announcement and Interview with the Winner

open access: yesNanomaterials, 2021
After an extensive voting period, we are proud to present the Best Paper Award to “Carbon Dots and Graphene Quantum Dots in Electrochemical Biosensing [...]
Nanomaterials Editorial Office
doaj   +1 more source

Electro-absorption of silicene and bilayer graphene quantum dots [PDF]

open access: yes, 2016
We study numerically the optical properties of low-buckled silicene and AB-stacked bilayer graphene quantum dots subjected to an external electric field, which is normal to their surface.
Abdelsalam, H.   +4 more
core   +2 more sources

Graphene-Quantum-Dot-Mediated Semiconductor Bonding: A Route to Optoelectronic Double Heterostructures and Wavelength-Converting Interfaces

open access: yesC, 2020
A semiconductor bonding technique that is mediated by graphene quantum dots is proposed and demonstrated. The mechanical stability, electrical conductivity, and optical activity in the bonded interfaces are experimentally verified.
Kosuke Nishigaya   +2 more
doaj   +1 more source

Recent Progress in Graphene-Based Electrocatalysts for Hydrogen Evolution Reaction

open access: yesNanomaterials, 2022
Hydrogen is regarded as a key renewable energy source to meet future energy demands. Moreover, graphene and its derivatives have many advantages, including high electronic conductivity, controllable morphology, and eco-friendliness, etc., which show ...
Xupeng Qin   +6 more
doaj   +1 more source

Advances in Nanomaterials-Based Electrochemical Biosensors for Foodborne Pathogen Detection

open access: yesNanomaterials, 2021
Electrochemical biosensors utilizing nanomaterials have received widespread attention in pathogen detection and monitoring. Here, the potential of different nanomaterials and electrochemical technologies is reviewed for the development of novel ...
Ivan Bobrinetskiy   +8 more
doaj   +1 more source

Effects of long-range disorder and electronic interactions on the optical properties of graphene quantum dots [PDF]

open access: yes, 2017
We theoretically investigate the effects of long-range disorder and electron-electron interactions on the optical properties of hexagonal armchair graphene quantum dots consisting of up to 10806 atoms.
Altıntaş, A.   +2 more
core   +2 more sources

Magnetism of graphene quantum dots

open access: yesnpj Quantum Materials, 2017
Condensed matter physics: intrinsic magnetism emerges in graphene quantum dots A local magetic moment emerges in nanoscale high purity graphene quantum dots, probably resulting from edge passivation.
Yuanyuan Sun   +8 more
doaj   +1 more source

Enhanced thermoelectric properties in boron nitride quantum-dot

open access: yesResults in Physics, 2017
We have investigated the ballistic thermoelectric properties in boron nitride quantum dots by using the nonequilibrium Green’s function approach and the Landauer transport theory.
Changning Pan, Mengqiu Long, Jun He
doaj   +1 more source

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