Journal
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
Volume 88, Issue 2, Pages 347-352Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s00339-007-3950-8
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High-resolution transmission electron microscopy (HRTEM) and electron diffraction analysis were performed on pure multi-walled novel type boron nitride nanotubes (BNNTs) by using a field-emission high-resolution 300 kV transmission electron microscope JEM-3100FEF ( Omega filter). In contrast to commonly observed monochiral multi-walled BNNTs, the present tubular shells within every individual BNNT ( up to similar to 50 shells) revealed the whole range of helixes, i.e., from zig-zag to arm-chair. This being paired with the wide variations in cross-sectional tubular shapes, i.e., from a faceted polygon to a cylinder, results in complex overall tubular structures. The BN atomic lattice fringe separations, down to 1.25 angstrom, on most symmetrical arm-chair (d(10-10) = 1.25 angstrom) and zigzag (d(11-20) = 2.15 angstrom) tubular wall fragments within the same multi-walled BN nanotubes were ultimately achieved during HRTEM.
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