Quantum Dots

What are QDs?  Quantum dots are tiny semiconducting nanocrystals less than 10nm across. Similar to a tuning fork, the size of the crystal determines their physical properties. 

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Think of quantum dots as speakers. The size of the speaker, like the size of a quantum dot, determines the frequency emitted. For example, the woofer, which is larger, produces low frequencies, while the tweeter, which is smaller, produces high frequencies.

Quantum dots, made of compounds such as cadmium telluride (CdTe), emit wavelengths of light based on their size. Their energy levels can be tuned to emit specific frequencies according to their diameter.

These hydrophilic quantum dots are made of the same material (CdTe), but their diameters determine the resonant wavelengths produced.

Quantum dots under white light.



(Images taken by team member)

Quantum dots under black light.