Large-current-controllable carbon nanotube field-effect transistor in electrolyte solution

Miho Myodo, Masafumi Inaba, Kazuyoshi Ohara, Ryogo Kato, Mikinori Kobayashi, Yu Hirano, Kazuma Suzuki, Hiroshi Kawarada

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


Large-current-controllable carbon nanotube field-effect transistors (CNT-FETs) were fabricated with mm-long CNT sheets. The sheets, synthesized by remote-plasma-enhanced CVD, contained both single- and double-walled CNTs. Titanium was deposited on the sheet as source and drain electrodes, and an electrolyte solution was used as a gate electrode (solution gate) to apply a gate voltage to the CNTs through electric double layers formed around the CNTs. The drain current came to be well modulated as electrolyte solution penetrated into the sheets, and one of the solution gate CNT-FETs was able to control a large current of over 2.5 A. In addition, we determined the transconductance parameter per tube and compared it with values for other CNT-FETs. The potential of CNT sheets for applications requiring the control of large current is exhibited in this study.

Original languageEnglish
Article number213503
JournalApplied Physics Letters
Issue number21
Publication statusPublished - May 25 2015
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


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