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Synthesis of (Bi2Te3)x(TiTe2)y and (Bi2Te3)x(TiTe2)3 Superlattices

Published online by Cambridge University Press:  01 February 2011

Mary Smeller ,
Fred R. Harris  and
David C. Johnson
Mary Smeller
Affiliation:
[email protected], University of Oregon, Chemmistry, 1253 University of Oregon, Eugene, OR, 97401, United States
Fred R. Harris
Affiliation:
[email protected], United States
David C. Johnson
Affiliation:
[email protected], University of Oregon, Chemistry
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Abstract

The synthesis of (Bi2Te3)x(TiTe2)x and (Bi2Te3)x(TiTe2)3 superlattices using modulated elemental reactants was successfully accomplished. This required the calibration of the deposition parameters to achieve both the desired atomic compositions of the constituent layers and the deposition of the absolute amounts of each of the components to yield the title compounds. Proper annealing conditions were determined from an investigation of the x-ray diffraction patterns of a superlattice sample as a function of annealing temperature. The change in lattice parameters as a function of x showed the expected linear behavior with slopes consistent with values expected from the published lattice parameters of the binary components. Rietveld refinement showed that the characteristic structure of the binary components is maintained in the superlattices studied.

Keywords

thermoelectricitynanostructurex-ray diffraction (XRD)
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 886: Symposium F – Materials and Technologies fore Direct Thermal-to-Electric Energy Conversion , 2005 , 0886-F03-07
Copyright
Copyright © Materials Research Society 2006

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References

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