Results 1 to 10 of about 190,053 (309)

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

Optimization of quantum dots for solar cell applications [PDF]

open access: yesSongklanakarin Journal of Science and Technology (SJST), 2021
The quantum dots-sensitized solar cells (QDSSC) provide an alternative concept to present day photovoltaic devices. Cadmium sulfide/Zinc sulfide-sensitized solar cells have been synthesized by chemical bath deposition, based on an aqueous medium ...
Lekshmi Gangadhar, P. K Praseetha
doaj   +1 more source

Size and Shape Effects of Silicon Quantum Dot Cohesive Energy

open access: yesTaiyuan Ligong Daxue xuebao, 2023
Purposes It aims to analyze the effect of the size and shape of silicon quantum dots on their binding energy. Methods The cohesive energy of silicon quantum dots with different sizes and shapes is calculated by using the method of density functional ...
Xiangsen LUAN, Xiaoli YAN, Hui LI
doaj   +1 more source

Piezomagnetic Quantum Dots [PDF]

open access: yesPhysical Review Letters, 2008
We study the influence of deformations on magnetic ordering in quantum dots doped with magnetic impurities. The reduction of symmetry and the associated deformation from circular to elliptical quantum confinement lead to the formation of piezomagnetic quantum dots.
Abolfath, Ramin M.   +2 more
openaire   +3 more sources

Carbon Quantum Dots Derived from Different Carbon Sources for Antibacterial Applications

open access: yesAntibiotics, 2021
Nanoparticles possess unique features due to their small size and can be composed of different surface chemistries. Carbon quantum dots possess several unique physico-chemical and antibacterial activities.
Yanyan Wu   +4 more
doaj   +1 more source

Optical Gain of Vertically Coupled Cd0.6Zn0.4Te/ZnTe Quantum Dots

open access: yesNanomaterials, 2023
The optical modal gain of Cd0.6Zn0.4Te/ZnTe double quantum dots was measured using a variable stripe length method, where large and small quantum dots are separated with a ZnTe layer.
Ming Mei   +6 more
doaj   +1 more source

Quantum dots [PDF]

open access: yesProceedings of the National Academy of Sciences, 2016
The purpose of this communication is to make a bibliographic review of Quantum Dots methods and their applications in the field of Biotechnology. Quantum dots (QDs) are a novel class of inorganic fluorophores, which are gaining widespread recognition as a result of their exceptional photophysical properties.
M.G.C. Pereira   +4 more
  +5 more sources

Quantum computation with quantum dots [PDF]

open access: yesPhysical Review A, 1998
We propose a new implementation of a universal set of one- and two-qubit gates for quantum computation using the spin states of coupled single-electron quantum dots. Desired operations are effected by the gating of the tunneling barrier between neighboring dots.
Loss, D., DiVincenzo, D. P.
openaire   +3 more sources

Quantum Dot Sensitized Photoelectrodes [PDF]

open access: yesNanomaterials, 2011
Quantum Dots (QDs) are promising alternatives to organic dyes as sensitisers for photocatalytic electrodes. This review article provides an overview of the current state of the art in this area. More specifically, different types of QDs with a special focus on heavy-metal free QDs and the methods for preparation and adsorption onto metal oxide ...
Thomas Nann, Thomas J. Macdonald
openaire   +4 more sources

Investigation of the temperature and precursors concentration dependence of the formation of ZnSe quantum dots

open access: yesEurasian Journal of Physics and Functional Materials, 2022
Various variations of the synthesis of ZnSe quantum dots are investigated. The influence of temperature, the concentration of precursors and the time of synthesis of quantum dots was taken into account.
B.A. Duisenbay   +7 more
doaj   +1 more source

Home - About - Disclaimer - Privacy