Hostname: page-component-8448b6f56d-dnltx Total loading time: 0 Render date: 2024-04-23T13:25:27.356Z Has data issue: false hasContentIssue false
  • English
  • Français

Structure of layered WSe2 thin films with ultralow thermal conductivity

Published online by Cambridge University Press:  31 January 2011

Seongwon Kim ,
Jian Min Zuo ,
Ngoc T. Nguyen ,
David C. Johnson  and
David G. Cahill
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
Get access

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.

Keywords

NanostructureThermal conductivityTransmission electron microscopy (TEM)
Type
Articles
Information
Journal of Materials Research , Volume 23 , Issue 4 , April 2008 , pp. 1064 - 1067
Copyright
Copyright © Materials Research Society 2008

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

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