High aspect ratio silicon dioxide-coated single-walled carbon nanotube scanning probe nanoelectrodes

Yoshie Narui; Donato M. Ceres; Jinyu Chen; Konstantinos P. Giapis; C. Patrick Collier

doi:10.1021/jp901080e

High aspect ratio silicon dioxide-coated single-walled carbon nanotube scanning probe nanoelectrodes

Yoshie Narui, Donato M. Ceres, Jinyu Chen, Konstantinos P. Giapis, C. Patrick Collier

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

We have fabricated high aspect ratio, hydrophilic nanoelectrodes from individual single-walled carbon nanotubes (SWNTs) mounted on conductive atomic force microscope (AFM) tips for use as electrochemical probes. Individual SWNTs with an average diameter of 5 nm and up to 1.5 μm in length were passivated with nanometer-thick SiO ₂ films, deposited conformally in an inductively coupled plasma reactor. The electrically insulating SiO ₂ films improved the nanotube rigidity and stabilized the nanotube-AFM tip contact to enable use in aqueous environments. The nanotube tip was successfully exposed by subjecting the probe to nanosecond electrical pulse etching but only after electron beam irradiation in a transmission electron microscope (TEM). Probe functionality was verified by electrodepositing gold nanoparticles from aqueous solution only at the exposed tip.

Original language	English
Pages (from-to)	6815-6820
Number of pages	6
Journal	Journal of Physical Chemistry C
Volume	113
Issue number	16
DOIs	https://doi.org/10.1021/jp901080e
State	Published - Apr 23 2009

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abstract = "We have fabricated high aspect ratio, hydrophilic nanoelectrodes from individual single-walled carbon nanotubes (SWNTs) mounted on conductive atomic force microscope (AFM) tips for use as electrochemical probes. Individual SWNTs with an average diameter of 5 nm and up to 1.5 μm in length were passivated with nanometer-thick SiO 2 films, deposited conformally in an inductively coupled plasma reactor. The electrically insulating SiO 2 films improved the nanotube rigidity and stabilized the nanotube-AFM tip contact to enable use in aqueous environments. The nanotube tip was successfully exposed by subjecting the probe to nanosecond electrical pulse etching but only after electron beam irradiation in a transmission electron microscope (TEM). Probe functionality was verified by electrodepositing gold nanoparticles from aqueous solution only at the exposed tip.",

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AU - Narui, Yoshie

AU - Ceres, Donato M.

AU - Chen, Jinyu

AU - Giapis, Konstantinos P.

AU - Collier, C. Patrick

PY - 2009/4/23

Y1 - 2009/4/23

N2 - We have fabricated high aspect ratio, hydrophilic nanoelectrodes from individual single-walled carbon nanotubes (SWNTs) mounted on conductive atomic force microscope (AFM) tips for use as electrochemical probes. Individual SWNTs with an average diameter of 5 nm and up to 1.5 μm in length were passivated with nanometer-thick SiO 2 films, deposited conformally in an inductively coupled plasma reactor. The electrically insulating SiO 2 films improved the nanotube rigidity and stabilized the nanotube-AFM tip contact to enable use in aqueous environments. The nanotube tip was successfully exposed by subjecting the probe to nanosecond electrical pulse etching but only after electron beam irradiation in a transmission electron microscope (TEM). Probe functionality was verified by electrodepositing gold nanoparticles from aqueous solution only at the exposed tip.

AB - We have fabricated high aspect ratio, hydrophilic nanoelectrodes from individual single-walled carbon nanotubes (SWNTs) mounted on conductive atomic force microscope (AFM) tips for use as electrochemical probes. Individual SWNTs with an average diameter of 5 nm and up to 1.5 μm in length were passivated with nanometer-thick SiO 2 films, deposited conformally in an inductively coupled plasma reactor. The electrically insulating SiO 2 films improved the nanotube rigidity and stabilized the nanotube-AFM tip contact to enable use in aqueous environments. The nanotube tip was successfully exposed by subjecting the probe to nanosecond electrical pulse etching but only after electron beam irradiation in a transmission electron microscope (TEM). Probe functionality was verified by electrodepositing gold nanoparticles from aqueous solution only at the exposed tip.

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High aspect ratio silicon dioxide-coated single-walled carbon nanotube scanning probe nanoelectrodes

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