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Development of Novel Conduction Control Technique for Graphene

Researchers have developed a novel technique for controlling the electrical conductivity of graphene.
Researchers at the Nanoelectronics Research Institute of the National Institute of Advanced Industrial Science and Technology (AIST), in joint work with a NIMS team headed by Dr. Kazuhito Tsukagoshi, a MANA Principal Investigator at the NIMS International Center for Materials Nanoarchitectonics, developed a novel technique for controlling the electrical conductivity of graphene.

A team headed by Dr. Shu Nakaharai, a Designated Intensive Researcher at the Collaboration Research Team Green Nanoelectronics Center (hereinafter, GNC; Leader: Naoki Yokoyama), Nanoelectronics Research Institute (Director: Seigo Kanemaru), National Institute of Advanced Industrial Science and Technology (hereinafter, AIST; President: Tamotsu Nomakuchi), and Dr. Shinichi Ogawa, an Invited Researcher at the Nanoelectronics Research Institute, AIST Innovation Center for Advanced Nanodevices (Director: Hiroyuki Akinaga), in joint research with a team headed by Dr. Kazuhito Tsukagoshi, a MANA Principal Investigator at the International Center for Materials Nanoarchitectonics (hereinafter, WPI-MANA; Director-General: Masakazu Aono), National Institute for Materials Science (hereinafter, NIMS; President: Sukekatsu Ushioda), developed a novel technique for controlling the electrical conductivity of graphene.

In the technique developed in this research, a helium ion beam is irradiated on graphene using a helium ion microscope to artificially introduce a low concentration of crystal defects, and it becomes possible to modulate the movement of electrons and holes in the graphene by applying a voltage to the gate electrode. Although this phenomenon of conduction control by introduction of crystal defects had been predicted theoretically, there were no examples in which on/off operation at room temperature was achieved experimentally. It is possible to introduce the technique developed in this work in the existing framework of production technology, including large area wafers.

For more details, please contact

Dr. Naoki Yokoyama
Leader-Collaborative Research Team,
Green Nanoelectronics Center,
Nanoelectronics Research Institute

Dr. Shintaro Sato

Dr. Kazuhito Tsukagoshi
International Center for Materials Nanoarchitectonics (MANA)
National Institute for Materials Science
TEL: +81-29-860-4894

For general inquiry

AIST Public Relations Department
TEL: +81-29-862-6216
FAX: +81-29-862-6212

NIMS Public Relations Office
Associated links
Meeting information
Details of this technology were presented at the 2012 International Conference on Solid State Devices and Materials (SSDM2012) held in Kyoto, Japan September 25-27, 2012.

Mikiko Tanifuji | Research asia research news
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