MANHASSET, N.Y. -- Molybdenum disulfide, used for many years as an industrial lubricant, promises to become another 2-D platform for electronic devices on par with graphene, itself a 2-D platform for new electronic devices.
Last year scientists at the Swiss university EPFL produced a transistor on the MoS2 material. Meanwhile researchers at the Massachusetts Institute of Technology have succeeded in making a variety of electronic components from MoS2. The researchers claim the material could help usher in radically new products, from whole walls that glow to clothing with embedded electronics to glasses with built-in display screens.
“It’s the most exciting time for electronics in the last 20 or 30 years,” said Tomás Palacios, the Emmanuel E. Landsman Associate Professor of EECS who thinks graphene and MoS2 are just the beginning of a new realm of research on two-dimensional materials.
The MIT researchers found making progress with graphene difficult because that material lacks a bandgap, and MoS2 comes with one.
The lack of a bandgap means a switch made of graphene can be turned on, but not off. "That means you can’t do digital logic,” said researcher Han Wang.
Researchers have been searching for a material that shares some of graphene’s extraordinary properties and has a bandgap, and molybdenum disulfide does.
Wang and Palacios were able to fabricate an inverter; a NAND gate; a memory device; and a ring oscillator, made up of 12 interconnected transistors, which can produce a precisely tuned wave output.
Also, by using one-molecule thick MoS2 material for transistors in large-screen displays to control each pixel of a display eliminates millions of atoms-thick silicon used in conventional transistors, potentially reducing cost and weight and improving energy efficiency, claim the researchers.
Further on, the material could be used, in combination with other 2-D materials, to make light-emitting devices lighting up an entire wall as well as for antenna and other circuitry of a cellphone being woven into the fabric of clothing, according to the researchers.
The MIT work was funded by the U.S. Office of Naval Research, the Microelectronics Advanced Research Corporation Focus Center for Materials, the National Science Foundation and the Army Research Laboratory.
A paper has been published online this month in the journal Nano Letters.
MoS2 is also a "super solvent", capable of carrying anything dissolved in it directly to the bloodstream if in contact with the skin. By itself, it is pretty innocuous, but this side-effect makes it a dangerous substance. In the 1960's era it was used as a vector for assassinations and surreptitiousness drugging of people.
Thanks for reading the story and connecting. I find it fascinating that this material can be used with graphene for future electronic applications. It's his kind of 'innovation w/o borders' that keeps the science and engineering moving along. Never mind that the real applications will only be consumed by our great-grandkids, if ever. Keep churning, researchers!
Yeah, the present use of Molybdenum sulphide is as the high temperature tolerant lubricant. Hence if this is used as an alternative to the semiconductor material, the components made out of it should be capable of operating at high temperature. Disadvantage is that MoS2 could react with oxygen and generate sulfur dioxide.
Yes, he must be referring to DMSO, an analog of acetone with the oxygen replaced by sulfur. And his second goof is also wrong. Hydrogen disulfide would be the analog to Hydrogen peroxide which decomposes to hydrogen sulfide, (more toxic than hydrogen cyanide but stinks so bad it's generally safer to have around) So don't put it on your sore muscles!
It is really a great property of being able to use a single atom of Molybdenum disulfide, this will help a lot in miniaturization of the products as compared to silicon. But I think it will take a lot time to come out with a working commercial device made up of this material.
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