What is artificial semiconductor made of?
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Answer:
One current method to build a semiconductor superlattice — materials comprised of alternating layers of ultra-thin, two-dimensional sheets only one or a few atoms thick — is to manually stack ultrathin layers one on top of the other, but this is labor-intensive. In addition, since the flake-like sheets are fragile, it takes a long time to build because many sheets will break during the placement process. The other method is to grow one new layer on top of the other, using a process called chemical vapor deposition. But since that means different conditions such as heat, pressure, or chemical environments are needed to grow each layer, the process could result in altering or breaking the layer underneath. This method is also labor-intensive with low yield rates.
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Quantum dots...
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