Purification of Single Wall Carbon Nanotubes as a Function of UV Wavelength, Atmosphere, and Temperature

Katherine E. Hurst; Anne C. Dillon; Shao Yang; John H. Lehman

doi:10.1021/jp804201y

Purification of Single Wall Carbon Nanotubes as a Function of UV Wavelength, Atmosphere, and Temperature

Katherine E. Hurst, Anne C. Dillon, Shao Yang, John H. Lehman

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

21 Scopus Citations

Abstract

We investigate the purification of as-prepared single wall carbon nanotubes (SWCNTs) by exposure to pulsed 193 and 248 nm laser light, as well as lamp wavelengths of 254 and 185 nm. Raman spectroscopy before and after laser exposure indicates the removal of non-nanotube material without modification of the distribution of tube diameter for material exposed to a 248 nm laser, while 193 nm laser light does not selectively oxidize carbon impurities. The mechanism of purification is further considered in the context of atmosphere (oxygen, ozone, nitrogen or partial vacuum) and temperature (measured average and calculated maximum). A mathematical model for pulsed laser heating is used to estimate the maximum temperature achieved during laser excitation. We attribute the purification of nanotube samples to photophysical interactions of the pulsed 248 nm photons in resonance with sp² carbon.

Original language	American English
Pages (from-to)	16296-16300
Number of pages	5
Journal	Journal of Physical Chemistry C
Volume	112
Issue number	42
DOIs	https://doi.org/10.1021/jp804201y https://doi.org/10.1021/jp804201y
State	Published - 2008
Externally published	Yes

NREL Publication Number

NREL/JA-590-44844

Keywords

basic sciences
single-walled carbon nanotubes
SWCNT

Access to Document

Cite this

@article{a69aa3752b4840a8ab46852233a66f7a,

title = "Purification of Single Wall Carbon Nanotubes as a Function of UV Wavelength, Atmosphere, and Temperature",

abstract = "We investigate the purification of as-prepared single wall carbon nanotubes (SWCNTs) by exposure to pulsed 193 and 248 nm laser light, as well as lamp wavelengths of 254 and 185 nm. Raman spectroscopy before and after laser exposure indicates the removal of non-nanotube material without modification of the distribution of tube diameter for material exposed to a 248 nm laser, while 193 nm laser light does not selectively oxidize carbon impurities. The mechanism of purification is further considered in the context of atmosphere (oxygen, ozone, nitrogen or partial vacuum) and temperature (measured average and calculated maximum). A mathematical model for pulsed laser heating is used to estimate the maximum temperature achieved during laser excitation. We attribute the purification of nanotube samples to photophysical interactions of the pulsed 248 nm photons in resonance with sp2 carbon.",

keywords = "basic sciences, single-walled carbon nanotubes, SWCNT",

author = "Hurst, {Katherine E.} and Dillon, {Anne C.} and Shao Yang and Lehman, {John H.}",

year = "2008",

doi = "10.1021/jp804201y",

language = "American English",

volume = "112",

pages = "16296--16300",

journal = "Journal of Physical Chemistry C",

issn = "1932-7447",

publisher = "American Chemical Society",

number = "42",

}

TY - JOUR

T1 - Purification of Single Wall Carbon Nanotubes as a Function of UV Wavelength, Atmosphere, and Temperature

AU - Hurst, Katherine E.

AU - Dillon, Anne C.

AU - Yang, Shao

AU - Lehman, John H.

PY - 2008

Y1 - 2008

N2 - We investigate the purification of as-prepared single wall carbon nanotubes (SWCNTs) by exposure to pulsed 193 and 248 nm laser light, as well as lamp wavelengths of 254 and 185 nm. Raman spectroscopy before and after laser exposure indicates the removal of non-nanotube material without modification of the distribution of tube diameter for material exposed to a 248 nm laser, while 193 nm laser light does not selectively oxidize carbon impurities. The mechanism of purification is further considered in the context of atmosphere (oxygen, ozone, nitrogen or partial vacuum) and temperature (measured average and calculated maximum). A mathematical model for pulsed laser heating is used to estimate the maximum temperature achieved during laser excitation. We attribute the purification of nanotube samples to photophysical interactions of the pulsed 248 nm photons in resonance with sp2 carbon.

AB - We investigate the purification of as-prepared single wall carbon nanotubes (SWCNTs) by exposure to pulsed 193 and 248 nm laser light, as well as lamp wavelengths of 254 and 185 nm. Raman spectroscopy before and after laser exposure indicates the removal of non-nanotube material without modification of the distribution of tube diameter for material exposed to a 248 nm laser, while 193 nm laser light does not selectively oxidize carbon impurities. The mechanism of purification is further considered in the context of atmosphere (oxygen, ozone, nitrogen or partial vacuum) and temperature (measured average and calculated maximum). A mathematical model for pulsed laser heating is used to estimate the maximum temperature achieved during laser excitation. We attribute the purification of nanotube samples to photophysical interactions of the pulsed 248 nm photons in resonance with sp2 carbon.

KW - basic sciences

KW - single-walled carbon nanotubes

KW - SWCNT

UR - http://www.scopus.com/inward/record.url?scp=55649109653&partnerID=8YFLogxK

U2 - 10.1021/jp804201y

DO - 10.1021/jp804201y

M3 - Article

AN - SCOPUS:55649109653

SN - 1932-7447

VL - 112

SP - 16296

EP - 16300

JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

IS - 42

ER -

Purification of Single Wall Carbon Nanotubes as a Function of UV Wavelength, Atmosphere, and Temperature

Abstract

NREL Publication Number

Keywords

Access to Document

Other files and links

Fingerprint

Cite this