Investigation of electrical properties of nano-carbon networks and their applications to electronics

2014 Fiscal Year Final Research Report

• Project/Area Number: 24656195
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Electronic materials/Electric materials
• Research Institution: Hokkaido University
• Principal Investigator: SANO EIICHI 北海道大学, 量子集積エレクトロニクス研究センター, 教授 (10333650)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: ナノカーボン / カーボンナノチューブ / 電子伝導 / 複素誘電率 / 薄膜トランジスタ / 複合材料 / 電磁波吸収体

Outline of Final Research Achievements

Carbon nanotubes (CNTs) have been attracting much attention due to wide application areas thanks to their excellent electric, mechanical, and thermal properties.
We presented a simple model for the drain current of CNT network thin-film transistors (TFTs) operated in the linear region. The model was based on the gate electrostatics and the continuity condition of the currents through CNT and CNT-CNT tunnel junction. The model was evaluated by comparing its calculations to experimentally measured drain current and low frequency (1/f) noise parameters. It provides useful information to improve the TFT performance. We calculated the complex permittivity of materials required to achieve a single-layer electromagnetic absorber with a high absorption coefficient in the 60-GHz band. On the basis of the findings, we developed three types of nonwoven fabrics with high porosity in which the fibers were coated with multiwalled carbon nanotubes.

Free Research Field

半導体集積回路