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BIBTEX RIS

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

2001; Elsevier BV; Volume: 333; Issue: 1-2 Linguagem: Inglês

10.1016/s0009-2614(00)01335-x

ISSN

1873-4448

Autores

Agnès Claye, Siti Fatimah Abd Rahman, J. E. Fischer, A. A. Sirenko, Gamini Sumanasekera, P. C. Eklund,

Tópico(s)

Advancements in Battery Materials

Resumo

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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