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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

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].
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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.
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References in periodicals archive ?
General survey XPS spectra of: (a) pristine PVDF film, (b) cellulose nanocrystallites, and (c) CdS-cellulose/PVDF composite.
The nanocrystallites sizes increase with the number of methylene groups.
Morelli, "Properties of phytochelatin-coated CdS nanocrystallites formed in a marine phytoplanktonic alga (Phaeodactylum tricornutum, Bohlin) in response to Cd," Plant Science, vol.
Wang et al., "Silver nanocrystallites: biofabrication using shewanella oneidensis, and an evaluation of their comparative toxicity on gram-negative and gram-positive bacteria," Environmental Science and Technology, vol.
Transformations in cobalt amalgam--from a homogeneous Co amalgam to nanocrystallites. Journal of Electro-analytical Chemistry, 498: 181-191.
The Au nanocrystallites display an optical absorption band peaking at 2.15 keV which is typical of the absorption of metallic gold nanocrystallites (21).
Preparation of carbon-coated Co and Ni nanocrystallites by a modified AC arc discharge method.
The results indicate that PVD sample appears finely crystallized, with nanocrystallites about 3 nm of diameter (Fig.
Synthesis of PbS nanocrystallites using a novel single molecule precursors approach: X-ray single-crystal structure of Pb[([S.sub.2][CNEtPr.sup.i]).sub.2].
Recent research just published from Rice University showed that [C.sub.60] in water agglomerates into nanocrystallites with a partially oxidized shell--rendering it water-soluble.
Before addressing these questions, we review line profile broadening from nanocrystallites.