Communication

Electrical Probing of Submicroliter Liquid Using Graphene Strip Transistors Built on a Nanopipette

  1. Chang-Hsiao Chen1,†,
  2. Cheng-Te Lin1,†,
  3. Yi-Hsien Lee1,
  4. Keng-Ku Liu1,
  5. Ching-Yuan Su1,
  6. Wenjing Zhang1,
  7. Lain-Jong Li1,2,*

Article first published online: 18 NOV 2011

DOI: 10.1002/smll.201101859

Issue

Small

Small

Volume 8, Issue 1, pages 43–46, January 9, 2012

Additional Information

How to Cite

Chen, C.-H., Lin, C.-T., Lee, Y.-H., Liu, K.-K., Su, C.-Y., Zhang, W. and Li, L.-J. (2012), Electrical Probing of Submicroliter Liquid Using Graphene Strip Transistors Built on a Nanopipette. Small, 8: 43–46. doi: 10.1002/smll.201101859

Author Information

  1. 1

    Research Center for Applied Sciences, Academia Sinica, Taipei 11529, Taiwan

  2. 2

    Department of Photonics, National Chiao Tung University, HsinChu 300, Taiwan

  1. †

    These authors contributed equally to this work.

*Research Center for Applied Sciences, Academia Sinica, Taipei 11529, Taiwan.

Publication History

  1. Issue published online: 4 JAN 2012
  2. Article first published online: 18 NOV 2011
  3. Manuscript Revised: 10 OCT 2011
  4. Manuscript Received: 6 SEP 2011

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Keywords:

  • field-effect transistors;
  • graphene;
  • liquid gating;
  • nanopipettes;
  • pH sensing
Thumbnail image of graphical 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.

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