Electronic sensitivity of carbon nanotubes to internal water wetting

Di Cao, Pei Pang, Jin He, Tao Luo, Jae Hyun Park, Predrag Krstic, Colin Nuckolls, Jinyao Tang, Stuart Lindsay

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

We have constructed devices in which the interior of a single-walled carbon nanotube (SWCNT) field-effect transistor acts as a nanofluidic channel that connects two fluid reservoirs, permitting measurement of the electronic properties of the SWCNT as it is wetted by an analyte. Wetting of the inside of the SWCNT by water turns the transistor on, while wetting of the outside has little effect. These observations are consistent with theoretical simulations that show that internal water both generates a large dipole electric field, causing charge polarization of the tube and metal electrodes, and shifts the valence band of the SWCNT, while external water has little effect. This finding may provide a new method to investigate water behavior at nanoscale. This also opens a new avenue for building sensors in which the SWCNT simultaneously functions as a concentrator, nanopore, and extremely sensitive electronic detector, exploiting the enhanced sensitivity of the interior surface.

Original languageEnglish (US)
Pages (from-to)3113-3119
Number of pages7
JournalACS Nano
Volume5
Issue number4
DOIs
StatePublished - Apr 26 2011

Fingerprint

Carbon Nanotubes
Single-walled carbon nanotubes (SWCN)
wetting
Wetting
Carbon nanotubes
carbon nanotubes
Water
sensitivity
electronics
water
Carbon nanotube field effect transistors
Nanofluidics
Electron tubes
Nanopores
concentrators
Valence bands
Electronic properties
Transistors
transistors
field effect transistors

Keywords

  • biosensor
  • carbon nanotube
  • nanoconfinement
  • nanofluidics
  • nanopore
  • water in nanoscale channels

ASJC Scopus subject areas

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

Cite this

Cao, D., Pang, P., He, J., Luo, T., Park, J. H., Krstic, P., ... Lindsay, S. (2011). Electronic sensitivity of carbon nanotubes to internal water wetting. ACS Nano, 5(4), 3113-3119. https://doi.org/10.1021/nn200251z

Electronic sensitivity of carbon nanotubes to internal water wetting. / Cao, Di; Pang, Pei; He, Jin; Luo, Tao; Park, Jae Hyun; Krstic, Predrag; Nuckolls, Colin; Tang, Jinyao; Lindsay, Stuart.

In: ACS Nano, Vol. 5, No. 4, 26.04.2011, p. 3113-3119.

Research output: Contribution to journalArticle

Cao, D, Pang, P, He, J, Luo, T, Park, JH, Krstic, P, Nuckolls, C, Tang, J & Lindsay, S 2011, 'Electronic sensitivity of carbon nanotubes to internal water wetting', ACS Nano, vol. 5, no. 4, pp. 3113-3119. https://doi.org/10.1021/nn200251z
Cao D, Pang P, He J, Luo T, Park JH, Krstic P et al. Electronic sensitivity of carbon nanotubes to internal water wetting. ACS Nano. 2011 Apr 26;5(4):3113-3119. https://doi.org/10.1021/nn200251z
Cao, Di ; Pang, Pei ; He, Jin ; Luo, Tao ; Park, Jae Hyun ; Krstic, Predrag ; Nuckolls, Colin ; Tang, Jinyao ; Lindsay, Stuart. / Electronic sensitivity of carbon nanotubes to internal water wetting. In: ACS Nano. 2011 ; Vol. 5, No. 4. pp. 3113-3119.
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