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Scientists Produce Atomically Thin Circuits and Transistors

By Parul Gupta

In a discovery that helps surface the way for future generation computing technologies and electronics and possible gadgets equally thin to the paper – researchers with the U.S. Department of Energy’s Lawrence Berkeley National Laboratory (Berkeley Lab) identified a way to organize chemically circuits and transistors that are only just a couple of atoms thick.

Their technique harvests functional organizations at a scale big enough to initiate thinking about virtual commercial and applications scalability. The researchers regulated the amalgamation of a transistor in which sleek channels were etched into conducting graphene, and a semiconducting material is known as transition-metal dichalcogenide, or TMDO, was incorporated in the empty channels. Both of such materials have single layer crystals and are automatically thin, so the bi-part assembly generated electronic structures that are necessarily two-dimensional. Also, the amalgamation can cover a space a few centimetres long and a couple of millimetres wide.

“It is a huge step towards a repeatable and scalable path to craft atomically thin electronics or cover more computing power in a smaller space,” says Xiang Zhang, a senior researcher in Berkeley Lab’s Materials Sciences Division who headed the research.

Zhang also possesses the Ernest S. Kuh Endowed Chair at the University of California Berkeley and is one of the members of the Kavli Energy Nano Sciences Institute at Berkeley. Other researchers who backed to the study include Yu Ye, Hanyu Zhu, Yuan Wang, Mervin Zhao and Siqi Wang from the UC Berkeley as well as David Muller and Yimo Han from Cornell University.

Their work is an element of a novel wave of study aimed at maintaining pace with Moore’s Law that holds that the sum of transistors in a United circuit doubles around every two years. For maintaining such pace, researchers foresee that integrated electronics will soon need transistors that ration less than ten nano meters in length.

Transistors are similar to electronic switches, and hence, they can turn off and on, which is a trait of semiconductors. However, at the scale of nano meter, silicon transistors probably won’t be a better option. It is because, silicon is a heavy material and as electronics crafted from silicon become smaller, their functionality as switches dramatically reduces, which is a major roadblock for upcoming electronics.

In such vein, the Berkeley Lab researchers discovered a method to implant a layered semiconductor, in this incidence, the TMDC molybdenum disulphide into various channels lithographically etched within a range of conducting graphene. “Such an approach enables the chemical gathering of electronic circuits, with the use of two-dimensional substances that revealed performance in comparison to the use of traditional metals for injecting current into the TMDCs,” says Mervin Zhao, a head author and student in Zhang’s group at UC Berkeley and Berkeley Lab.

In addition to this, the researchers discussed the applicability of the structure by organizing it into the practical circuitry of an inverter. It further underscores the potential of the technology to prepare the foundation for a chemically organized atomic computer, confirm the researchers.


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