DC Characterisation of C60 Whiskers and Nanowhiskers

Michael Larsson, Jakob Kjelstrup-Hansen, Stepan Lucyszyn

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    Abstract

    C60 whiskers exhibit increasing conductivity with decreasing diameter. At diameters of 1 mm and below, a single-crystal structure predominates, and enhanced electrical characteristics are expected; however, no supporting data exists in the literature. Here, results of four-point probe measurements on C60 whiskers and nanowhiskers with diameters in the range 650 nm to 1.3 mm are reported for the first time. Samples are attached to pre-patterned planar and raised electrodes using FIB-deposited tungsten. A low resistivity of 3 Wcm is measured in air, on a C60 whisker having a diameter of 650 nm, indicating strong potential for use in organic electronic applications of the future. Repeated current cycling in air is observed to promote sample degradation, possibly due to progressive oxidation of the carbon structure. A micromachined four-point probe is also used to try to establish non-invasive electrical connections with samples. Preliminary results of such trials are presented, indicating it to be a feasible alternative to the use of deposited electrodes.
    Original languageEnglish
    JournalE C S Transactions
    Volume2
    Issue number12
    Pages (from-to)27-38
    ISSN1938-5862
    DOIs
    Publication statusPublished - 2007
    EventECS Meeting : Fullerenes, Nanotubes, and Carbon Nanostructures - Denver, Colorado
    Duration: 1 Jan 2006 → …
    Conference number: 209th

    Conference

    ConferenceECS Meeting : Fullerenes, Nanotubes, and Carbon Nanostructures
    Number209th
    CityDenver, Colorado
    Period01/01/2006 → …

    Bibliographical note

    Copyright The Electrochemical Society, Inc. [2007]. All rights reserved. Except as provided under U.S. copyright law, this work may not be reproduced, resold, distributed, or modified without the express permission of The Electrochemical Society (ECS).

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