Electrical transport and field-effect transistors using inkjet-printed SWCNT films having different functional side groups

Eduardo Gracia-Espino, Giovanni Sala, Flavio Pino, Niina Halonen, Juho Luomahaara, Jani Mäklin, Géza Tóth, Krisztián Kordás, Heli Jantunen, Mauricio Terrones Maldonado, Panu Helistö, Heikki Seppá, Pulickel M. Ajayan, Robert Vajtai

Research output: Contribution to journalArticlepeer-review

65 Scopus citations

Abstract

The electrical properties of random networks of single-wall carbon nanotubes (SWNTs) obtained by inkjet printing are studied. Water-based stable inks of functionalized SWNTs (carboxylic acid, amide, polyethylene glycol), and polyaminobenzene sulfonic acid) were prepared and applied to inkjet deposit microscopic patterns of nanotube films on lithographically defined silicon chips with a back-side gate arrangement. Source-drain transfer characteristics and gate-effect measurements confirm the important role of the chemical functional groups in the electrical behavior of carbon nanotube networks. Considerable nonlinear transport in conjunction with a high channel current on/off ratio of ∼ 70 was observed with polyethylene glycol)-functionalized nanotubes. The positive temperature coefficient of channel resistance shows the nonmetallic behavior of the inkjet-printed films. Other inkjet-printed field-effect transistors using carboxyl-functionalized nanotubes as source, drain, and gate electrodes, poly(ethylene glycol)-functionalized nanotubes as the channel, and poly(ethylene glycol) as the gate dielectric were also tested and characterized.

Original languageEnglish (US)
Pages (from-to)3318-3324
Number of pages7
JournalACS Nano
Volume4
Issue number6
DOIs
StatePublished - Jun 22 2010

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

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