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Graphene, a typical material with two dimensions, is widely used and highly sought-after by scientists and the industry. What exactly is a 2-dimensional material? Simple, two-dimensional material is a non-nanoscale (1 to 100 nm) material in which electrons are able to move freely in two directions (planar movement). Examples of such materials include: graphene; boron nitride; transition metal compounds (disulfide); Molybdenum; tungsten diulfide, disilicide and black phosphorus.
2D materials can be used in a variety of fields. Combining the examples of the authors' previous introductions, we can say that spintronics is printed electronics, flexible electronic, microelectronics memory, processors hyperlenses terahertz supercapacitors solar cells security labels. , quantum dots, sensors, semiconductor manufacturing, NFC, medical, etc.
Molybdenum diulfide, also known as MoS2, is a typical 2-dimensional material that deserves our attention. Molybdenum diulfide, which is composed of two atoms of molybdenum with one atom of sulfur, has only three atoms of thickness. Molybdenum diulfide and graphene are almost identical in thickness, however, molybdenum diulfide's band gap is 1.8 eV while graphene has no band gap. In this respect, the author introduced the fact that the US Department of Energy Berkeley Lab's research team has accurately measured band gap of semiconductor two-dimensional materials molybdenum. disulfide.
In addition, the molybdenum diulfide has an electron mobility that is 100 cm2 /vs. (i.e. 100 electrons per centimeter square per volt) - although this is much less than the crystal. The silicon has a 1400 cm2/vs electron transfer rate, but has a higher migration rate than other ultra-thin semiconductors and amorphous silica.
Molybdenum diulfide, with its excellent semiconductor properties, small size, ultra thin, and softness, is especially suitable for transistors, flexible electronic, LEDs lasers, solar cells.
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