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Title: The effects of bismuth intercalation on structure and thermal conductivity of TiS{sub 2}

Abstract

The structure and thermal conductivity of the bismuth (Bi) intercalated compounds Bi {sub x}TiS{sub 2} (0 {<=} x {<=} 0.25) were investigated by using X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS) and thermal conductivity measurements. The results indicated that besides lattice expansion and distortion, bismuth intercalation caused structural transition of Bi {sub x}TiS{sub 2} from stage-1 to stage-2 as x {>=} {approx}0.1, which led to the appearance of D{sub 4} and A{sub 2} modes in Raman spectra. The enhancement of relative intensities of D{sub 4} and A{sub 2} peaks with increasing Bi content reflected increase of the concentration of stage-2 phase in the samples. The red shift of mode E{sub g} as well as D{sub 4} and A{sub 2} would reflect weakening of intra-layer bonds, while the blue shift of A{sub 1g} after intercalation suggested the enhancement of chemical binding in the van der Waals gaps due to charge transfer. In addition, the weakening of A{sub 1g} intensity can be explained by the lattice distortion produced by bismuth intercalation. Remarkable reduction in (lattice) thermal conductivity of titanium disulfide (TiS{sub 2}) through Bi intercalation was realized, which could be attributed to the phonon scattering by 'rattling' of the intercalatedmore » bismuth atoms in the van der Waals gaps of TiS{sub 2}.« less

Authors:
 [1];  [2];  [1]
  1. Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, 230031 Hefei (China)
  2. Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, 230031 Hefei (China). E-mail: xyqin@issp.ac.cn
Publication Date:
OSTI Identifier:
20891619
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 41; Journal Issue: 2; Other Information: DOI: 10.1016/j.materresbull.2005.08.025; PII: S0025-5408(05)00328-4; Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; BISMUTH; DISULFIDES; RAMAN SPECTRA; RAMAN SPECTROSCOPY; RED SHIFT; THERMAL CONDUCTIVITY; TITANIUM; TITANIUM SULFIDES; VAN DER WAALS FORCES; X-RAY DIFFRACTION; X-RAY PHOTOELECTRON SPECTROSCOPY

Citation Formats

Li, D., Qin, X.Y., and Gu, Y.J. The effects of bismuth intercalation on structure and thermal conductivity of TiS{sub 2}. United States: N. p., 2006. Web. doi:10.1016/j.materresbull.2005.08.025.
Li, D., Qin, X.Y., & Gu, Y.J. The effects of bismuth intercalation on structure and thermal conductivity of TiS{sub 2}. United States. doi:10.1016/j.materresbull.2005.08.025.
Li, D., Qin, X.Y., and Gu, Y.J. Thu . "The effects of bismuth intercalation on structure and thermal conductivity of TiS{sub 2}". United States. doi:10.1016/j.materresbull.2005.08.025.
@article{osti_20891619,
title = {The effects of bismuth intercalation on structure and thermal conductivity of TiS{sub 2}},
author = {Li, D. and Qin, X.Y. and Gu, Y.J.},
abstractNote = {The structure and thermal conductivity of the bismuth (Bi) intercalated compounds Bi {sub x}TiS{sub 2} (0 {<=} x {<=} 0.25) were investigated by using X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS) and thermal conductivity measurements. The results indicated that besides lattice expansion and distortion, bismuth intercalation caused structural transition of Bi {sub x}TiS{sub 2} from stage-1 to stage-2 as x {>=} {approx}0.1, which led to the appearance of D{sub 4} and A{sub 2} modes in Raman spectra. The enhancement of relative intensities of D{sub 4} and A{sub 2} peaks with increasing Bi content reflected increase of the concentration of stage-2 phase in the samples. The red shift of mode E{sub g} as well as D{sub 4} and A{sub 2} would reflect weakening of intra-layer bonds, while the blue shift of A{sub 1g} after intercalation suggested the enhancement of chemical binding in the van der Waals gaps due to charge transfer. In addition, the weakening of A{sub 1g} intensity can be explained by the lattice distortion produced by bismuth intercalation. Remarkable reduction in (lattice) thermal conductivity of titanium disulfide (TiS{sub 2}) through Bi intercalation was realized, which could be attributed to the phonon scattering by 'rattling' of the intercalated bismuth atoms in the van der Waals gaps of TiS{sub 2}.},
doi = {10.1016/j.materresbull.2005.08.025},
journal = {Materials Research Bulletin},
number = 2,
volume = 41,
place = {United States},
year = {Thu Feb 02 00:00:00 EST 2006},
month = {Thu Feb 02 00:00:00 EST 2006}
}