What are Quantum Dots?

[Music] [Music] quantum dots are small semiconducting nano crystals that can be made up of a variety of different elements such as silicon cadmium selenide or cadmium sulfide they range in size from two to ten nanometers one nanometer is about the width of two silicon atoms these semiconducting materials are able to absorb light when they release that energy they transform it into a different color of light the specific color that a quantum dot will produce depends mostly on the size and material of the quantum dot the reason for this is something called quantum confinement the effect is similar to that of two different sized bells when the larger one is struck the result will be low energy sound waves while the smaller one creates higher energy waves when light excites a quantum dot the larger the size of the dot the lower the energy waves will be resulting in a redder light the smaller it is the bluer the light will be quantum dots are currently used in biological medical research as well as in solar panels televisions and solid-state lighting [Music]

Channel: NanoTube - The National Nanotechnology Initiative

Views: 32,788

Keywords: nanotechnology

Id: oTrZqhf0_N8

Length: 1min 50sec (110 seconds)

Published: Wed Mar 22 2017