Definition Of Quantum Dot In Physics

Although prone to decoherence such quantum computers build on well established solid state techniques and offer the prospect of readily applying integrated circuit scaling technology.

Definition of quantum dot in physics. Quantum dots qds are nanocrystals of a semiconductor material whose size is between single molecules and bulk crystalline solids. Typical quantum dot sizes range between 2 and 20 nm. A quantum dot is a particle of matter so small that the addition or removal of an electron changes its properties in some useful way. In normal solar cells a photon of light generates one electron.

A typical picture of quantum dots can be seen in fig. A semiconductor nanocrystal exhibiting quantum mechanical effects that allow it to mimic the properties of an atom the quantum dot is a semiconducting or metallic region so tiny that it is essentially confined in all three dimensions. Qds are remarkable because their tiny size produces physically confined electrons which are also called quantum confinements. Like an atom it contains a finite number of charges and has discrete energy levels.

A quantum dot is a nanoparticle made of any semiconductor material such as silicon cadmium selenide cadmium sulfide or indium arsenide. Quantum dots qds are tiny semiconductor particles a few nanometres in size having optical and electronic properties that differ from larger particles due to quantum mechanics. They are a central topic in nanotechnology. A semiconductor nanostructure in which the excitons are constrained in all three spatial dimensions.

Quantum dot synonyms quantum dot pronunciation quantum dot translation english dictionary definition of quantum dot. Any of various semiconductor nanocrystals that. Extremely small regions known as quantum dots and in one of two spin states interpreted as 0 and 1. All atom s are of course quantum dots but multi molecular combinations can have this characteristic.

In biochemistry quantum dots are called redox groups. Definition of quantum dot.