Graphene Essay

258 WordsApr 15, 20122 Pages
GRAPHENE This single-atom-thick honeycomb of carbon atoms is lighter than aluminium, stronger than steel and conducts heat and electricity better than copper. As a result, scientists around the world are trying to turn it into better computer displays, solar panels, touch screens, integrated circuits and biomedical sensors, among other possible applications. However, it has proven extremely difficult to reliably create graphene-based devices that live up to its electrical potential when operating at room temperature and pressure. Graphene, a two-dimensional crystalline form of carbon, is being touted as a sort of "Holy Grail" of materials. It boasts properties such as a breaking strength 200 times greater than steel and, of great interest to the semiconductor and data storage industries, electric currents that can blaze through it 100 times faster than in silicon. Various Devices Graphene transistors, FET RF’s, Solar cells, ultra-capacitors, Graphene biodevices, Integrated circuits Recent developments A team of Vanderbilt physicists reports that they have nailed down the source of the interference inhibiting the rapid flow of electrons through graphene-based devices and found a way to suppress it. This allowed them to achieve record-levels of room-temperature electron mobility -- the measure of the speed that electrons travel through a material -- three times greater than those reported in previous graphene-based devices. According to the experts, graphene may have the highest electron mobility of any known material. In practice, however, the measured levels of mobility, while significantly higher than in other materials like silicon, have been considerably below its potential.

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