Thermal and Electronic Properties of Exfoliated Metal Chalcogenides

The thermal conductivity of layered metal chalcogenides such as MT2 (M = Mo, W; T = S, Se) shows a marked decrease after exfoliation and subsequent restacking process. Random stacking of two-dimensional crystalline sheets circumvents thermal conduction pathways along a longitudinal direction, which...

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Bibliographic Details
Published in:Bulletin of the Korean Chemical Society 2010, 31(11), , pp.3225-3227
Main Authors: Kim, Jong-Young, Choi, Soon-Mok, Seo, Won-Seon, Cho, Woo-Seok
Format: Article
Language:English
Subjects:
화학
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Summary:The thermal conductivity of layered metal chalcogenides such as MT2 (M = Mo, W; T = S, Se) shows a marked decrease after exfoliation and subsequent restacking process. Random stacking of two-dimensional crystalline sheets circumvents thermal conduction pathways along a longitudinal direction, which results in a reduction in thermal conductivity. WS2 and WSe2 compounds retain p-type conducting behavior after exfoliation and restacking with decreased electrical conductivity due to the change in carrier concentration. MoSe2 compound exhibits metallic behavior < 130 oC with a small Seebeck coefficient, which results from metastable 1T-MoSe2 structure of the restacked phase. KCI Citation Count: 58
ISSN:0253-2964
1229-5949
DOI:10.5012/bkcs.2010.31.11.3225