Ecole Makes World’s First Molybdenite Chip

After Silicon and Graphene, it might be the turn of Molybdenite to steal the limelight. Scientists at  Ã‰cole Polytechnique Fédérale de Lausanne,  or EPFL, have synthesized the world’s first Molybdenite chip. It has a number of advantages over the conventional silicon chip, including greater energy efficiency and integration of transistors on a larger scale.

The Molybdenite Chip (Courtesy: EPFL, 2011)

Molybdenite vs Silicon vs Graphene!

Molybdenum disulphide, or MoS2, is found much more widely than Silicon. It has high flexibility and also good semi-conducting properties. The greatest advantage of Molybdenite is that it allows for drastic miniaturization. Silicon cannot be made less than 2 nm thick, since, on further thinning, it oxidizes and the surface properties are lost. Molybdenite can be made as thin as 3 atomic layers.

Molybdenite can even rival graphene. The main problem with Graphene is the lack of any natural bandgap. Silicon is extremely convenient in this respect with a 0.7 V bandgap at room temperature. Molybdenite has no such bandgap problems. Though electronic mobility for molybdenite is much less than that of Graphene, for normal circuitry (i.e. not RF circuits) Molybdenite can be easily implemented. The switching speed is much higher than silicon transistors, but less than Graphene. However, the on-off voltage ratio is much higher for molybdenite than for Graphene, making it a better switch, if the switching operations need not be very fast.

All of this coupled with the obvious amplification properties, make Molybdenite a good option for future electronics.

The flexibility of Molybdenite inspires flexible sheets of chips that can be strapped onto a human hand! How’s that for a futuristic vision?

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Debjyoti Bardhan

Is a science geek, currently pursuing some sort of a degree (called a PhD) in Physics at TIFR, Mumbai. An enthusiastic but useless amateur photographer, his most favourite activity is simply lazing around. He is interested in all things interesting and scientific.