セントラルフロリダ大学光学・光子学部(CREOL, The College of Optics & Photonics)の助教授のRyan M. Gelfand(ライアン・M・ゲルファンド)氏は、彼が、研究仲間の院生ジョセフ・フリードマン(現在はテキサス大学ダラス校助教授)氏と共に、グラフェンベースの超高速トランジスタ構築構想の研究を開始した時、ノースウェスタン大学の院生でした。



Graphene transistor could mean computers that are 1,000 times faster

Traditional silicon-based transistors revolutionized electronics with their ability to switch current on and off. By controlling the flow of current, transistors allowed the creation of smaller radios, televisions and computers.


As reported this month in the scholarly journal Nature Communications, Friedman, Gelfand and their fellow researchers have theorized a next-generation transistor that’s based not on silicon but on a ribbon of graphene, a two-dimensional carbon material with the thickness of a single atom.

学術雑誌Nature Communicationsで今月発表されたように、フリードマン氏、ゲルファント氏と彼等の同僚研究員達は、シリコンベースではなく、単一原子厚の二次元炭素材、グラフェンのリボンをベースにした、次世代トランジスタを理論化しています。彼等の研究成果は、エレクトロニクス、計算速度、ビッグデータに多大な影響を及ぼすと、研究者は語ります。


“If you want to continue to push technology forward, we need faster computers to be able to run bigger and better simulations for climate science, for space exploration, for Wall Street. To get there, we can’t rely on silicon transistors anymore,” said Gelfand, the director of the NanoBioPhotonics Laboratory at UCF.



Researchers found that by applying a magnetic field to a graphene ribbon, they could change the resistance of current flowing through it. For this device, the magnetic field is controlled by increasing or decreasing the current through adjacent carbon nanotubes.


Increasing or decreasing the strength of the magnetic field would also increase or decrease the flow of current through this new kind of transistor, much like a valve controlling the flow of water through a pipe.



Transistors act as on and off switches. A series of transistors in different arrangements act as logic gates, allowing microprocessors to solve complex arithmetic and logic problems. But the speed of computer microprocessors that rely on silicon transistors has been relatively stagnant for years, with clock speeds mostly in the 3 to 4 gigahertz range.


They would also be smaller and substantially more efficient, allowing device-makers to shrink technology and squeeze in more functionality, Gelfand said.