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

Small. 2012 Jan 9;8(1):43-6. doi: 10.1002/smll.201101859. Epub 2011 Nov 18.

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.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Graphite / chemistry*
  • Hydrogen-Ion Concentration
  • Nanostructures / chemistry*
  • Nanotechnology / instrumentation*
  • Transistors, Electronic*

Substances

  • Graphite