In situ Raman scattering studies of alkali-doped single wall carbon nanotubes

A. Claye; S. Rahman; J. E. Fischer; A. Sirenko; G. U. Sumanasekera; P. C. Eklund

doi:10.1016/S0009-2614(00)01335-X

In situ Raman scattering studies of alkali-doped single wall carbon nanotubes

A. Claye, S. Rahman, J. E. Fischer, A. Sirenko, G. U. Sumanasekera, P. C. Eklund

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Abstract

Electrochemical doping and in situ Raman scattering were used to study charge transfer in K- and Li-doped single wall carbon nanotubes (SWNT) as a function of alkali concentration. An 8 cm^-1 downshift was observed for the tangential phonon mode of SWNT doped to stoichiometries of KC₂₄ and Li_1.25C₆. The shift in both systems is reversible upon de-doping despite an irreversible loss of crystallinity. These results indicate that the tangential mode shifts result from electron transfer from alkali dopants to the SWNT, and that these modes are only weakly affected by long-range order within the ropes.

Original language	English (US)
Pages (from-to)	16-22
Number of pages	7
Journal	Chemical Physics Letters
Volume	333
Issue number	1-2
DOIs	https://doi.org/10.1016/S0009-2614(00)01335-X
State	Published - Jan 5 2001
Externally published	Yes

All Science Journal Classification (ASJC) codes

General Physics and Astronomy
Physical and Theoretical Chemistry

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10.1016/S0009-2614(00)01335-X

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@article{6bce9385a69c4cefb17925893662380a,

title = "In situ Raman scattering studies of alkali-doped single wall carbon nanotubes",

abstract = "Electrochemical doping and in situ Raman scattering were used to study charge transfer in K- and Li-doped single wall carbon nanotubes (SWNT) as a function of alkali concentration. An 8 cm-1 downshift was observed for the tangential phonon mode of SWNT doped to stoichiometries of KC24 and Li1.25C6. The shift in both systems is reversible upon de-doping despite an irreversible loss of crystallinity. These results indicate that the tangential mode shifts result from electron transfer from alkali dopants to the SWNT, and that these modes are only weakly affected by long-range order within the ropes.",

author = "A. Claye and S. Rahman and Fischer, {J. E.} and A. Sirenko and Sumanasekera, {G. U.} and Eklund, {P. C.}",

note = "Funding Information: Purified SWNT were provided by A.G. Rinzler and R.E. Smalley. Work at the University of Pennsylvania was funded by the National Science Foundation MRSEC Program, grant No. DMR96-32598 and by the New Energy Development Organization. Work at the University of Kentucky and the Pennsylvania State University was funded by the National Science Foundation MRSEC Program, grant No. DMR98-09686 and by the Department Of Defense DEPSOR Program, grant No. DAAB07-97-CJ036. ",

year = "2001",

month = jan,

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doi = "10.1016/S0009-2614(00)01335-X",

language = "English (US)",

volume = "333",

pages = "16--22",

journal = "Chemical Physics Letters",

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publisher = "Elsevier B.V.",

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TY - JOUR

T1 - In situ Raman scattering studies of alkali-doped single wall carbon nanotubes

AU - Claye, A.

AU - Rahman, S.

AU - Fischer, J. E.

AU - Sirenko, A.

AU - Sumanasekera, G. U.

AU - Eklund, P. C.

N1 - Funding Information: Purified SWNT were provided by A.G. Rinzler and R.E. Smalley. Work at the University of Pennsylvania was funded by the National Science Foundation MRSEC Program, grant No. DMR96-32598 and by the New Energy Development Organization. Work at the University of Kentucky and the Pennsylvania State University was funded by the National Science Foundation MRSEC Program, grant No. DMR98-09686 and by the Department Of Defense DEPSOR Program, grant No. DAAB07-97-CJ036.

PY - 2001/1/5

Y1 - 2001/1/5

N2 - Electrochemical doping and in situ Raman scattering were used to study charge transfer in K- and Li-doped single wall carbon nanotubes (SWNT) as a function of alkali concentration. An 8 cm-1 downshift was observed for the tangential phonon mode of SWNT doped to stoichiometries of KC24 and Li1.25C6. The shift in both systems is reversible upon de-doping despite an irreversible loss of crystallinity. These results indicate that the tangential mode shifts result from electron transfer from alkali dopants to the SWNT, and that these modes are only weakly affected by long-range order within the ropes.

AB - Electrochemical doping and in situ Raman scattering were used to study charge transfer in K- and Li-doped single wall carbon nanotubes (SWNT) as a function of alkali concentration. An 8 cm-1 downshift was observed for the tangential phonon mode of SWNT doped to stoichiometries of KC24 and Li1.25C6. The shift in both systems is reversible upon de-doping despite an irreversible loss of crystallinity. These results indicate that the tangential mode shifts result from electron transfer from alkali dopants to the SWNT, and that these modes are only weakly affected by long-range order within the ropes.

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U2 - 10.1016/S0009-2614(00)01335-X

DO - 10.1016/S0009-2614(00)01335-X

M3 - Article

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SN - 0009-2614

VL - 333

SP - 16

EP - 22

JO - Chemical Physics Letters

JF - Chemical Physics Letters

IS - 1-2

ER -

In situ Raman scattering studies of alkali-doped single wall carbon nanotubes

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