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KAWANISHI-CITY, Japan, March 9, 2021 /PRNewswire/ -- Quantum dots are extremely small fluorescent nanoparticles typically between several hundred to several thousand of atoms or molecules, and 1 to 9 nanometers in diameter. They are also referred to as artificial atom molecules. Quantum dots have the concept of energy level, bandgap, conduction band, valence band which are the same as for normal bulk size material. However, because of its quantum confinement effect caused by their extremely small size, energy level of quantum dots become discontinuous and separated. This means that one can control the color of light given off by a quantum dot solely by changing its size and chemical composition, and light can be converted into nearly any desired color in the spectrum ranging from the UV to the IR region.