Electrical Characteristics of Metal Contacts to Carbon Nanowalls

Zewen Sun, Minsu Cho, Lei Huang, Ryota Hijiya, Yoshimine Kato, Kungen Teii

研究成果: ジャーナルへの寄稿学術誌査読

3 被引用数 (Scopus)


The electrical characteristics of metal contacts to vertically-aligned nanographite structures, the so-called carbon nanowalls (CNWs), are examined using nickel as the electrode material. The total resistance between a pair of electrodes on CNWs is regarded as the sum of the serial resistance of CNWs and two metal-CNWs contacts to measure the contact resistance and specific contact resistivity by the transmission line method and transfer line method, respectively. The contact resistance and resistivity are around 2.8 ω and 0.1 ω cm2, respectively, at room temperature and decrease gently to 2.4 ω and 0.06 ω cm2, respectively, when the temperature is increased up to 300 °C. The apparent activation energy corresponding to the conduction barrier at the contact is in the range of 10-3 eV to 10-2 eV, which is comparable with that for the sheet resistance of CNWs. The contact resistance occupies a large portion of the total resistance between a pair of electrodes even at high temperatures, thus affecting electrical signal measurement in electronic and electrochemical device applications.

ジャーナルECS Journal of Solid State Science and Technology
出版ステータス出版済み - 6月 2022

!!!All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料


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