quantum dot


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quantum dot

[‚kwänt·əm ′dät]
(electronics)
A quantized electronic structure in which electrons are confined with respect to motion in all three dimensions.

quantum dot

(physics)
(Or "single-electron transistor") A location capable of containing a single electrical charge; i.e., a single electron of Coulomb charge. Physically, quantum dots are nanometer-size semiconductor structures in which the presence or absence of a quantum electron can be used to store information.

See also: quantum cell, quantum cell wire, quantum-dot cellular automata.

http://www-mtl.mit.edu/MTL/bulletin/v6n2/Kumar.html.

["Quantum Dot Heterostructures", D. Bimberg, et al, John Wiley & Sons Ltd., Dec 1998].

quantum dot

A minuscule crystal of semiconductor material composed of various compounds of chemicals such as cadmium, zinc, tellurium, selenium and sulfur. Less than 500 nanometers in size, these "nanoparticles" react to light, as well as electricity, and emit their own light across the visible range of wavelengths from 470 to 730 nm.

The applications for quantum dots include medical sensors and lighting systems that are "painted" onto materials. Thin film deposits of quantum dots on solar cell substrates can increase their voltage output by fluorescing the light before it is captured. See QuantumFilm, quantum dot backlight, ULED and QLED.
References in periodicals archive ?
Atav, "Computation of the oscillator strength and absorption coefficients for the intersubband transitions of the spherical quantum dot," Opt.
Optical Detection of Single-Electron Tunneling into a Semiconductor Quantum Dot
While the latest news means that this year's iPhones won't feature quantum dot technology, it doesn't mean the 2019 iPhones will lag behind other smartphone companies in the area of mobile photography as this year's iPhones are expected to come with (https://www.ibtimes.com/iphone-xr-2019-sports-dual-camera-module-glass-back-leaked-render-2790763) enhanced (https://www.ibtimes.com/apple-iphone-11-leaked-features-triple-cameras-upgraded-face-id-bigger-battery-2797128) camera setups.
The molecule serving as the quantum dot for the measurement has to be attached to the tip beforehand and this is only possible in a vacuum at low temperatures.
It will be cheap to manufacture because the quantum dots will be applied as a liquid layer at room temperature (think ink-jet printing) and self-organize as they dry.
The post Anti-counterfeiting quantum dot technology now available in SA appeared first on SA Food Review .
The researchers mixed tea leaf extract with cadmium sulphate (CdSO4) and sodium sulphide (Na2S) and allowed the solution to incubate, a process which causes quantum dots to form.
In the recent work Pb5Sb8S17 quantum dots are formed on the TiO2 nanoparticles by successive ionic layer adsorption and reaction (SILAR) method.
Summary: A stable and sensitive electrochemiluminescence (ECL) detection protocol of o-aminophenol was developed, which was based on CdSe quantum dots (QDs) and the cavity structure of [beta]-cyclodextrin.
Apart from the revolutionary picture quality that is powered by Samsung's metal alloy quantum dots and Smart TV functions that help control almost all peripheral devices with the one remote control, Samsung's QLED TV is the lifestyle TV that gives consumers the freedom to put their TV anywhere.
Ledentsov, Quantum Dot Heterostructures, Wiley, New York, NY, USA, 1999.