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The structure of nanocomposite 1D cationic conductor crystal@SWNT
Author(s) -
KISELEV N.A.,
KUMSKOV A.S.,
ZAKALYUKIN R.M.,
VASILIEV A.L.,
CHERNISHEVA M.V.,
ELISEEV A.A.,
KRESTININ A.V.,
FREITAG B.,
HUTCHISON J.L.
Publication year - 2012
Publication title -
journal of microscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.569
H-Index - 111
eISSN - 1365-2818
pISSN - 0022-2720
DOI - 10.1111/j.1365-2818.2012.03622.x
Subject(s) - materials science , carbon nanotube , crystallography , transmission electron microscopy , monoclinic crystal system , crystal (programming language) , crystal structure , nanotube , nanocomposite , molecular physics , nanotechnology , chemistry , computer science , programming language
Summary Nanocomposites consisting of one‐dimensional (1D) crystals of the cationic conductors CuI, CuBr and AgBr inside single‐walled carbon nanotubes, mainly ( n , 0), were obtained using the capillary technique. 1D crystal structure models were proposed based on the high resolution transmission electron microscopy performed on a FEI Titan 80–300 at 80 kV with aberration correction. According to the models and image simulations there are two modifications of 1D crystal: hexagonal close‐packed bromine (iodine) anion sublattice (growth direction <001>) and 1D crystal cubic structure (growth direction <112>) compressed transversely to the nanotube ( D m ∼1.33 nm) axis. Tentatively this kind of 1D crystal can be considered as monoclinic. One modification of the anion sublattice reversibly transforms into the other inside the nanotube, probably initiated by electron beam heating. As demonstrated by micrographs, copper or silver cations can occupy octahedral positions or are statistically distributed across two tetrahedral positions. A 1DAgBr@SWNT (18, 0; 19, 0) pseudoperiodic ‘lattice distortion' is revealed resulting from convolution of the nanotube wall function image with 1D cubic crystal function image.