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Semiconductor Molybdenum disulfide
It is not a good semiconductor. Scientists and chemists are looking for other materials to replace graphene. They are synthesizing other two-dimensional flakes that are flexible and transparent with electronic properties that graphene is unable to match.
This is one.
Molybdenum disulfide Overview
Molybdenum diulfide, a TMD (transition metal disulfide material), was synthesized in 2008. The name is the structure of these materials: a molybdenum-containing transition metal atom and two atoms in column 16 of periodic table, including selenium and sulfur (the family of elements known as oxygen group element).
TMDs are all semiconductors. This is a surprise to electronics manufacturers. The TMDs are about the same thickness as graphene.
They also have other benefits. One of the main advantages for molybdenum is its electron mobility, or the speed with which electrons move in the sheet. Molybdenum is a disulfide with an electron migration speed of 100 cm2/vs. (That is 100 electrons/square centimeter/volt second). This is much less than the 1400cm2/vs of crystalline silica, but it is still thinner than sand and other materials. Scientists study semiconductors to use them in future products like flexible display screens or other electronic devices that can be flexibly strained.
Research on Molybdenum diulfide
Studies have shown molybdenum diulfide to be extremely easy-to-make, even in large pieces of materials. This allows engineers the ability to test electronic products quickly.
In 2011, a research team led by Andras Kis of the Swiss Federal Institute of Technology published an article in “Nature-Nanotechnology”, saying that they used a single layer of molybdenum disulfide thin-film of only 0.65 nanometers to make the first transistors. The products of the first generation and their subsequent versions have many unique features that distinguish them from more technologically advanced silicon-based products.
Molybdenum diulfide also has some other desirable properties. One of them is the direct bandgap. It allows the material convert electrons to photons or vice versa. This property also makes molybdenum a good candidate to be used in optical devices like light emitters. lasers. photodetectors and even solar cell. Yi-Hsien says that because this material has abundant reserves, is non-toxic, and low-priced, its future looks bright. Tomanek however believes that the rate of electron migration is higher than what Tomanek claims.
This is still not enough. In a crowded electronic market, if the price is too high, it’s hard to get a competitive advantage. The structural characteristics of the material are to blame. It is because electrons will bounce when they come into contact with larger metals atoms. Scientists believe this “stumblingblock” is only temporary. Researchers are working to circumvent the obstacles by using a multilayer sheet of molybdenum sulfide that is slightly thicker.
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