2013 Fiscal Year Final Research Report

Transport studies of nano-carbon materials by use of non-contact method

Research Project

Project/Area Number	24654115
Research Category	Grant-in-Aid for Challenging Exploratory Research
Allocation Type	Single-year Grants
Research Field	Condensed matter physics II
Research Institution	Institute of Physical and Chemical Research
Principal Investigator	OSHIMA Yugo 独立行政法人理化学研究所, 加藤分子物性研究室, 専任研究員 (10375107)
Project Period (FY)	2012-04-01 – 2014-03-31
Keywords	ナノチューブ・フラーレン / ナノ材料 / 物性実験
Research Abstract	We have studied the transport mechanisms of carbon-based nano materials by use of non-contact method (Cavity Perturbation Technique). This non-contact method is promising for future studies of the carbon nanotubes since there is no problem of the contact resistance. By applying this technique to a oriented thin films of single-walled carbon nanotubes (SWCNT), we have found that intrinsic transport properties is dominant for SWCNT thin film with low content ratio (0.5 wt%), and magneto transport effect such as Aharonov-Bohm effect was observed. On the other hand, for high-content ratio (above 5 wt%) where large amount of tube contacts exist inside the film, extrinsic transport effects such as the weak-localization or variable range hopping effect are relevant.