Electronic sensitivity of a single-walled carbon nanotube to internal electrolyte composition

D. Cao, P. Pang, H. Liu, J. He, Stuart Lindsay

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Carbon nanotubes (CNTs) are well known as materials for nanoelectronics and show great potential to be used as the sensing elements in chemical and biological sensors. Recently, CNTs have been shown to be effective nanofluidic channels and the transport of substances through small diameter CNTs is intrinsically fast, selective, and operates at the single molecule level. It has been shown that the transport characteristics of semiconducting single-walled CNT (SWCNT) field effect transistors (FETs) are sensitive to internal water wetting. We report here that the characteristics of semiconducting SWCNT FETs are also sensitive to the concentration, pH and ion type of the ionic solution when the electrolyte is inside the CNT. Such sensitivity is not observed at the outside surface of a semiconducting SWCNT. This opens a new avenue for building new types of CNT sensor devices in which the SWCNT concurrently functions as a nanochannel and an electronic detector.

Original languageEnglish (US)
Article number085203
JournalNanotechnology
Volume23
Issue number8
DOIs
StatePublished - Mar 2 2012

Fingerprint

Carbon Nanotubes
Single-walled carbon nanotubes (SWCN)
Electrolytes
Carbon nanotubes
Chemical analysis
Carbon nanotube field effect transistors
Nanofluidics
Nanoelectronics
Sensors
Field effect transistors
Chemical elements
Wetting
Ions
Detectors
Molecules
Water

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Electrical and Electronic Engineering
  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)

Cite this

Electronic sensitivity of a single-walled carbon nanotube to internal electrolyte composition. / Cao, D.; Pang, P.; Liu, H.; He, J.; Lindsay, Stuart.

In: Nanotechnology, Vol. 23, No. 8, 085203, 02.03.2012.

Research output: Contribution to journalArticle

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