Acceptor doping of single-walled carbon nanotubes by encapsulation of zinc halogenides

M. Kharlamova (), L. Yashina, A. Volykhov, J. Niu, V. Neudachina, M. Brzhezinskaya, T. Zyubina, A. Belogorokhov and A. Eliseev

The European Physical Journal B: Condensed Matter and Complex Systems, 2012, vol. 85, issue 1, 1-8

Abstract: To modify the electronic properties of single-walled carbon nanotubes (SWCNTs), ZnX 2 @SWCNT (X=Cl, Br, I) nanostructures were prepared by capillary filling of 1.4–1.6 nm single-walled carbon nanotubes (SWCNT) with zinc halogenide melts. The loading factor is estimated as 30% for ZnCl 2 and approximately 60% for ZnBr 2 and ZnI 2 . Well-ordered 1D crystals were observed by TEM only for ZnI 2 @SWCNT. We propose two possible atomic structures of the 1D crystals, (Zn 4 I 7 ) n and less stable (Zn 4 I 9 ) n . According to the optical absorption and photoemission data, there is a charge transfer from the nanotube to the filler for all ZnX 2 @SWCNT nanostructures. The results of the DFT PW-GGA modeling indicate that the acceptor properties correspond to (Zn 4 I 9 ) n only. Copyright EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2012

Keywords: Topical issue: From photophysics to optoelectronics of zero- and one-dimensional nanomaterials (search for similar items in EconPapers)
Date: 2012
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DOI: 10.1140/epjb/e2011-20457-6

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