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

doi:10.1021/nn200251z

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 journal › Article

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 language	English (US)
Pages (from-to)	3113-3119
Number of pages	7
Journal	ACS Nano
Volume	5
Issue number	4
DOIs	https://doi.org/10.1021/nn200251z
State	Published - 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 journal › Article

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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Access to Document

10.1021/nn200251z