Improved field emission stability from single-walled carbon nanotubes chemically attached to silicon

Cameron Shearer; Adam Fahy; Matthew Barr; Paul Dastoor; Joseph Shapter

doi:10.1186/1556-276X-7-432

Improved field emission stability from single-walled carbon nanotubes chemically attached to silicon

Cameron Shearer, Adam Fahy, Matthew Barr, Paul Dastoor, Joseph Shapter

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

9 Citations (Scopus)

Abstract

Here, we demonstrate the simple fabrication of a single-walled carbon nanotube (SWCNT) field emission electrode which shows excellent field emission characteristics and remarkable field emission stability without requiring posttreatment. Chemically functionalized SWCNTs were chemically attached to a silicon substrate. The chemical attachment led to vertical alignment of SWCNTs on the surface. Field emission sweeps and Fowler-Nordheim plots showed that the Si-SWCNT electrodes field emit with a low turn-on electric field of 1.5 V μm^-1 and high electric field enhancement factor of 3,965. The Si-SWCNT electrodes were shown to maintain a current density of >740 μA cm^-2 for 15 h with negligible change in applied voltage. The results indicate that adhesion strength between the SWCNTs and substrate is a much greater factor in field emission stability than previously reported.

Original language	English
Article number	432
Pages (from-to)	432-1-432-4
Number of pages	4
Journal	Nanoscale Research Letters
Volume	7
DOIs	https://doi.org/10.1186/1556-276X-7-432
Publication status	Published - 1 Aug 2012

Keywords

Chemical attachment
Field emission
Field emission stability
Nanoelectronics
Single-walled carbon nanotubes

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10.1186/1556-276X-7-432

Cite this

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title = "Improved field emission stability from single-walled carbon nanotubes chemically attached to silicon",

abstract = "Here, we demonstrate the simple fabrication of a single-walled carbon nanotube (SWCNT) field emission electrode which shows excellent field emission characteristics and remarkable field emission stability without requiring posttreatment. Chemically functionalized SWCNTs were chemically attached to a silicon substrate. The chemical attachment led to vertical alignment of SWCNTs on the surface. Field emission sweeps and Fowler-Nordheim plots showed that the Si-SWCNT electrodes field emit with a low turn-on electric field of 1.5 V μm-1 and high electric field enhancement factor of 3,965. The Si-SWCNT electrodes were shown to maintain a current density of >740 μA cm-2 for 15 h with negligible change in applied voltage. The results indicate that adhesion strength between the SWCNTs and substrate is a much greater factor in field emission stability than previously reported.",

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T1 - Improved field emission stability from single-walled carbon nanotubes chemically attached to silicon

AU - Shearer, Cameron

AU - Fahy, Adam

AU - Barr, Matthew

AU - Dastoor, Paul

AU - Shapter, Joseph

PY - 2012/8/1

Y1 - 2012/8/1

N2 - Here, we demonstrate the simple fabrication of a single-walled carbon nanotube (SWCNT) field emission electrode which shows excellent field emission characteristics and remarkable field emission stability without requiring posttreatment. Chemically functionalized SWCNTs were chemically attached to a silicon substrate. The chemical attachment led to vertical alignment of SWCNTs on the surface. Field emission sweeps and Fowler-Nordheim plots showed that the Si-SWCNT electrodes field emit with a low turn-on electric field of 1.5 V μm-1 and high electric field enhancement factor of 3,965. The Si-SWCNT electrodes were shown to maintain a current density of >740 μA cm-2 for 15 h with negligible change in applied voltage. The results indicate that adhesion strength between the SWCNTs and substrate is a much greater factor in field emission stability than previously reported.

AB - Here, we demonstrate the simple fabrication of a single-walled carbon nanotube (SWCNT) field emission electrode which shows excellent field emission characteristics and remarkable field emission stability without requiring posttreatment. Chemically functionalized SWCNTs were chemically attached to a silicon substrate. The chemical attachment led to vertical alignment of SWCNTs on the surface. Field emission sweeps and Fowler-Nordheim plots showed that the Si-SWCNT electrodes field emit with a low turn-on electric field of 1.5 V μm-1 and high electric field enhancement factor of 3,965. The Si-SWCNT electrodes were shown to maintain a current density of >740 μA cm-2 for 15 h with negligible change in applied voltage. The results indicate that adhesion strength between the SWCNTs and substrate is a much greater factor in field emission stability than previously reported.

KW - Chemical attachment

KW - Field emission

KW - Field emission stability

KW - Nanoelectronics

KW - Single-walled carbon nanotubes

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U2 - 10.1186/1556-276X-7-432

DO - 10.1186/1556-276X-7-432

M3 - Article

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SP - 432-1-432-4

JO - Nanoscale Research Letters

JF - Nanoscale Research Letters

M1 - 432

ER -

Improved field emission stability from single-walled carbon nanotubes chemically attached to silicon

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Keywords

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