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Structure of layered WSe2 thin films with ultralow thermal conductivity

Published online by Cambridge University Press:  31 January 2011

Seongwon Kim
Affiliation:
Department of Material Science and Engineering and F. Seitz Materials Research Laboratory, University of Illinois at Urbana–Champaign, Urbana, Illinois 61801
Jian Min Zuo*
Affiliation:
Department of Material Science and Engineering and F. Seitz Materials Research Laboratory, University of Illinois at Urbana–Champaign, Urbana, Illinois 61801
Ngoc T. Nguyen
Affiliation:
Department of Chemistry, University of Oregon, Eugene, Oregon 97403
David C. Johnson
Affiliation:
Department of Chemistry, University of Oregon, Eugene, Oregon 97403
David G. Cahill
Affiliation:
Department of Material Science and Engineering and F. Seitz Materials Research Laboratory, University of Illinois at Urbana–Champaign, Urbana, Illinois 61801
*
a)Address all correspondence to this author. e-mail: jianzuo@uiuc.edu
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Abstract

Crystallographic ordering and defects in WSe2 thin films with ultralow thermal conductivity are characterized by electron imaging and diffraction in cross-sectional geometry. The results show that the film consists of oriented, coherent crystallites that are a few nanometers in diameter. Two films of different thickness with different thermal conductivity are compared. We show that the film with a lower thermal conductivity is characterized by less coherent crystallites with a greater degree of misorientation.

Type
Articles
Copyright
Copyright © Materials Research Society 2008

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References

REFERENCES

1Chiritescu, C., Cahill, D.G., Nguyen, N., Johnson, D., Bodapati, A., Keblinski, P.Zschack, P.: Ultralow thermal conductivity in disordered, layered WSe2 crystals. Science 315, 351 2007CrossRefGoogle ScholarPubMed
2Schutte, W.J., Deboer, J.L.Jellinek, F.: Crystal-structures of tungsten disulfide and diselenide. J. Solid State Chem. 70, 207 1987CrossRefGoogle Scholar
3Wilson, J.A.Yoffe, A.D.: The transition metal dichalcogenides discussion and interpretation of the observed optical: Electrical and structural properties. Adv. Phys. 18, 193 1969CrossRefGoogle Scholar
4Moss, S., Noh, M., Jeong, K.H., Kim, D.H.Johnson, D.C.: Synthesis of designed W-WSe2 heterostructures from superlattice reactants. Chem. Mater. 8, 1853 1996Google Scholar
5Benedict, J., Anderson, R.Klepeis, S.J.: Recent developments in the use of the tripod polisher for TEM specimen preparation: Specimen preparation for transmission electron microscopy of materials-III, edited by R. Anderson, B. Tracy, and J. Bravman (Mater. Res. Soc. Symp. Proc. 254, Pittsburgh, 1990) 121CrossRefGoogle Scholar