From macrosize to microsize to nanosize: great video for those learning about the potential (and awesomeness) of nanotechnology! (See an Example of ‘Nano-Crystals’ – Quantum Dots – Below). Watch the Video below:
Quantum Dots – An Example of New Nano-Materials
A quantum dot is a semiconductor nanostructure that confines the motion of conduction band electrons, valence band holes, or excitons (bound pairs of conduction band electrons and valence band holes) in all three spatial directions.
Small quantum dots, such as colloidal semiconductor nanocrystals, can be as small as 2 to 10 nanometers, corresponding to 10 to 50 atoms in diameter and a total of 100 to 100,000 atoms within the quantum dot volume.
Self-assembled quantum dots are typically between 10 and 50 nm in size.
Quantum dots defined by lithographically patterned gate electrodes, or by etching on two-dimensional electron gases in semiconductor heterostructures can have lateral dimensions exceeding 100 nm.
At 10 nm in diameter, nearly 3 million quantum dots could be lined up end to end and fit within the width of a human thumb.
Current and future applications of QDs impact a broad range of industrial markets. These include, for example:
Biology and biomedicine
Computing and memory
Electronics and displays
Optoelectronic devices such as LEDs, lighting and lasers
Optical components in telecommunications and image sensors
Security applications such as covert identification tagging or biowarfare detection sensors.
The global market for quantum dots (QDs) was estimated to generate $121 million in revenues in 2013. This market is expected to reach about $1.1 billion in 2016 and about $3.1 billion by 2018, at a compound annual growth rate (CAGR) of 90.8% for the five-year period, 2013 to 2018.
Genesis Nanotechnology, Inc. ~ “Great Things from Small Things”