Quantum dot

Quantum dots (QDs) are semiconductor particles a few nanometres in size. They have optical and electronic properties which are different from larger particles because of the quantum mechanics.

Thumb — Colloidal quantum dots under a UV light.

Due to their tiny size, they are able to replicate certain properties of atoms. For example, a change in their size can change the wavelength of light they output. This can be seen in the image to the right.

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