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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 31, Number 11
BKCSDE 31(11)
November 20, 2010 
 
Title
 Thermal and Electronic Properties of Exfoliated Metal Chalcogenides
Author
 Jong Young Kim*, Soon Mok Choi, Won Seon Seo, Woo Seok Cho
Keywords
 Thermal properties, Electrical properties
Abstract
 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.
Page
 3225 - 3227
Full Text
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