Optical properties and charge transfer effects in single-walled carbon nanotubes filled with functionalized adamantane molecules

A. A. Tonkikh, D. V. Rybkovskiy, A. S. Orekhov, A. I. Chernov, A. A. Khomich, C. P. Ewels, E. I. Kauppinen, S. B. Rochal, A. L. Chuvilin, E. D. Obraztsova

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

The filling of single-walled carbon nanotube films with 1-adamantanemethanol and 1-bromoadamantane molecules was carried out by a gas-phase procedure. Optical absorption and Raman spectroscopies revealed the effects of charge transfer for samples treated with 1-bromoadamantane. Using density functional simulations we show that the charge transfer takes place when bromine is detached from the carbon cage and accepts electrons as free-standing atoms or as polybromide structures. Transmission electron microscope images confirm the presence of individual bromine atoms inside carbon nanotubes, treated with 1-bromoadamantane molecules. The observed charge transfer is, therefore, a marker of the dehalogenization reaction, a critical step in the synthesis process of narrow 1D sp3 nanostructures.

Original languageEnglish
Pages (from-to)87-97
Number of pages11
JournalCarbon
Volume109
DOIs
Publication statusPublished - 1 Nov 2016
Externally publishedYes

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