Low-energy electron irradiation of preheated and gas-exposed single-wall carbon nanotubes

P. A. Ecton; J. Beatty; G. Verbeck; W. Lakshantha; B. Rout; J. M. Perez

doi:10.1016/j.apsusc.2016.06.111

Low-energy electron irradiation of preheated and gas-exposed single-wall carbon nanotubes

P. A. Ecton, J. Beatty, G. Verbeck, W. Lakshantha, B. Rout, J. M. Perez

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

2 Scopus citations

Abstract

We investigate the conditions under which electron irradiation at 2 keV of single-wall carbon nanotube (SWCNT) bundles produces an increase in the Raman D peak. We find that irradiation of SWCNTs that are preheated in situ at 600 °C for 1 h in ultrahigh vacuum before irradiation does not result in an increase in the D peak. Irradiation of SWCNTs that are preheated in vacuum and then exposed to air or gases results in an increase in the D peak, suggesting that adsorbates play a role in the increase in the D peak. Small diameter SWCNTs that are not preheated or preheated and then exposed to air show a significant increase in the D and G bands after irradiation. X-ray photoelectron spectroscopy shows no chemical shifts in the C 1s peak of SWCNTs that have been irradiated versus SWCNTs that have not been irradiated, suggesting that chemisorption of adsorbates is not responsible for the increase in the D peak.

Original language	English (US)
Pages (from-to)	822-827
Number of pages	6
Journal	Applied Surface Science
Volume	387
DOIs	https://doi.org/10.1016/j.apsusc.2016.06.111
State	Published - Nov 30 2016
Externally published	Yes

Keywords

Carbon nanotubes
Defects
Electron irradiation

ASJC Scopus subject areas

Condensed Matter Physics
Surfaces, Coatings and Films
Surfaces and Interfaces

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10.1016/j.apsusc.2016.06.111

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title = "Low-energy electron irradiation of preheated and gas-exposed single-wall carbon nanotubes",

abstract = "We investigate the conditions under which electron irradiation at 2 keV of single-wall carbon nanotube (SWCNT) bundles produces an increase in the Raman D peak. We find that irradiation of SWCNTs that are preheated in situ at 600 °C for 1 h in ultrahigh vacuum before irradiation does not result in an increase in the D peak. Irradiation of SWCNTs that are preheated in vacuum and then exposed to air or gases results in an increase in the D peak, suggesting that adsorbates play a role in the increase in the D peak. Small diameter SWCNTs that are not preheated or preheated and then exposed to air show a significant increase in the D and G bands after irradiation. X-ray photoelectron spectroscopy shows no chemical shifts in the C 1s peak of SWCNTs that have been irradiated versus SWCNTs that have not been irradiated, suggesting that chemisorption of adsorbates is not responsible for the increase in the D peak.",

keywords = "Carbon nanotubes, Defects, Electron irradiation",

author = "Ecton, {P. A.} and J. Beatty and G. Verbeck and W. Lakshantha and B. Rout and Perez, {J. M.}",

note = "Publisher Copyright: {\textcopyright} 2016 Elsevier B.V.",

year = "2016",

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doi = "10.1016/j.apsusc.2016.06.111",

language = "English (US)",

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T1 - Low-energy electron irradiation of preheated and gas-exposed single-wall carbon nanotubes

AU - Ecton, P. A.

AU - Beatty, J.

AU - Verbeck, G.

AU - Lakshantha, W.

AU - Rout, B.

AU - Perez, J. M.

PY - 2016/11/30

Y1 - 2016/11/30

N2 - We investigate the conditions under which electron irradiation at 2 keV of single-wall carbon nanotube (SWCNT) bundles produces an increase in the Raman D peak. We find that irradiation of SWCNTs that are preheated in situ at 600 °C for 1 h in ultrahigh vacuum before irradiation does not result in an increase in the D peak. Irradiation of SWCNTs that are preheated in vacuum and then exposed to air or gases results in an increase in the D peak, suggesting that adsorbates play a role in the increase in the D peak. Small diameter SWCNTs that are not preheated or preheated and then exposed to air show a significant increase in the D and G bands after irradiation. X-ray photoelectron spectroscopy shows no chemical shifts in the C 1s peak of SWCNTs that have been irradiated versus SWCNTs that have not been irradiated, suggesting that chemisorption of adsorbates is not responsible for the increase in the D peak.

AB - We investigate the conditions under which electron irradiation at 2 keV of single-wall carbon nanotube (SWCNT) bundles produces an increase in the Raman D peak. We find that irradiation of SWCNTs that are preheated in situ at 600 °C for 1 h in ultrahigh vacuum before irradiation does not result in an increase in the D peak. Irradiation of SWCNTs that are preheated in vacuum and then exposed to air or gases results in an increase in the D peak, suggesting that adsorbates play a role in the increase in the D peak. Small diameter SWCNTs that are not preheated or preheated and then exposed to air show a significant increase in the D and G bands after irradiation. X-ray photoelectron spectroscopy shows no chemical shifts in the C 1s peak of SWCNTs that have been irradiated versus SWCNTs that have not been irradiated, suggesting that chemisorption of adsorbates is not responsible for the increase in the D peak.

KW - Carbon nanotubes

KW - Defects

KW - Electron irradiation

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DO - 10.1016/j.apsusc.2016.06.111

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SN - 0169-4332

VL - 387

SP - 822

EP - 827

JO - Applied Surface Science

JF - Applied Surface Science

ER -

Low-energy electron irradiation of preheated and gas-exposed single-wall carbon nanotubes

Abstract

Keywords

ASJC Scopus subject areas

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