Electrical probing of submicroliter liquid using graphene strip transistors built on a nanopipette

Chang Hsiao Chen, Cheng Te Lin, Yi Hsien Lee, Keng Ku Liu, Ching Yuan Su, Wenjing Zhang, Lain-Jong Li*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

Graphene sheets made by chemical vapor deposition are transferred onto a glass nanopipette to form graphene strips. Two strips are connected at the nanopipette tip end to form a transistor channel. This graphene-based transistor can be operated in a liquid-gating condition, thereby allowing the electrical detection of the pH value of a droplet with submicroliter volume.

Original languageEnglish (US)
Pages (from-to)43-46
Number of pages4
JournalSmall
Volume8
Issue number1
DOIs
StatePublished - Jan 9 2012

Keywords

  • field-effect transistors
  • graphene
  • liquid gating
  • nanopipettes
  • pH sensing

ASJC Scopus subject areas

  • Biotechnology
  • Biomaterials
  • Engineering (miscellaneous)

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