Superconducting tantalum disulfide nanotapes; growth, structure and stoichiometry

Dunnill, C. W., MacLaren, I. and Gregory, D. H. (2010) Superconducting tantalum disulfide nanotapes; growth, structure and stoichiometry. Nanoscale, 2(1), pp. 90-97. (doi:10.1039/b9nr00224c) (PMID:20648369)

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Superconducting tantalum disulfide nanowires have been synthesised by surface-assisted chemical vapour transport (SACVT) methods and their crystal structure, morphology and stoichiometry studied by powder X-ray diffraction (PXD), scanning electron microscopy/energy dispersive X-ray spectroscopy (SEM/EDX), transmission electron microscopy (TEM), selected area electron diffraction (SAED) and nanodiffraction. The evolution of morphology, stoichiometry and structure of materials grown by SACVT methods in the Ta-S system with reaction temperature was investigated systematically. High-aspect-ratio, superconducting disulfide nanowires are produced at intermediate reaction temperatures (650 degrees C). The superconducting wires are single crystalline, adopt the 2H polytypic structure (hexagonal space group P6(3)/mmc: a = 3.32(2) angstrom, c = 12.159(2) angstrom; c/a = 3.66) and grow in the <2<(1)over bar>(1) over bar0> direction. The nanowires are of rectangular cross-section forming nanotapes composed of bundles of much smaller fibres that grow cooperatively. At lower reaction temperatures nanowires close to a composition of TaS3 are produced whereas elevated temperatures yield platelets of 1T TaS2.

Item Type:Articles
Keywords:2H-TAS2, carbon, crystal, crystal-structure, diffraction, electron-microscopy, nanostructures, nanotubes, nanowires, single spectroscopy, sulfur, temperature, x-ray-diffraction.
Glasgow Author(s) Enlighten ID:MacLaren, Dr Ian and Gregory, Professor Duncan
Authors: Dunnill, C. W., MacLaren, I., and Gregory, D. H.
College/School:College of Science and Engineering > School of Chemistry
College of Science and Engineering > School of Physics and Astronomy
Journal Name:Nanoscale
Publisher:Royal Society of Chemistry
ISSN (Online):2040-3372
Published Online:27 October 2009
Copyright Holders:Copyright © 2020 The Royal Society of Chemistry
First Published:First published in Nanoscale 2(1): 90-97
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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