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Quantum dots have also been suggested as implementations of qubits for quantum information processing, [66] and as active elements for thermoelectrics. [67] [68] [69] Tuning the size of quantum dots is attractive for many potential applications.
Quantum dots are semiconducting particles that have been reduced below the size of the Exciton Bohr radius and due to quantum mechanics considerations, the electron energies that can exist within them become finite, much alike energies in an atom. Quantum dots have been referred to as "artificial atoms".
Quantum dots (QDs) are semiconductor nanoparticles with a size less than 10 nm. [1] [2] They exhibited size-dependent properties especially in the optical absorption and the photoluminescence (PL).
Typically, the size of the silicon quantum dots is defined by controlling material synthesis. For example, silicon quantum dot size can be controlled by the reaction temperature during thermal disproportionation of silsesquioxanes. [1] Similarly, the plasma residence time in non-thermal plasma methods is a key factor. [2]
Due to their small size, quantum dots do not showcase the bulk properties of the specified semi-conductor but rather show quantised energy states. [20] This effect is known as the quantum confinement and has led to numerous applications of quantum dots such as the quantum well laser. [20]
This page was last edited on 8 September 2017, at 02:59 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
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Graphene quantum dots (GQDs) are graphene nanoparticles with a size less than 100 nm. Due to their exceptional properties such as low toxicity, stable photoluminescence , chemical stability and pronounced quantum confinement effect, GQDs are considered as a novel material for biological, opto-electronics, energy and environmental applications.