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  Full Access to Nanoscale Bismuth-Palladium Intermetallics by Low-Temperature Syntheses

Heise, M., Chang, J.-H., Schoenemann, R., Herrmannsdoerfer, T., Wosnitza, J., & Ruck, M. (2014). Full Access to Nanoscale Bismuth-Palladium Intermetallics by Low-Temperature Syntheses. Chemistry of Materials, 26(19), 5640-5646. doi:10.1021/cm502315a.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0024-344C-9 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0024-344D-7
Genre: Journal Article

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 Creators:
Heise, Martin1, Author
Chang, Jen-Hui1, Author
Schoenemann, Rico1, Author
Herrmannsdoerfer, Thomas1, Author
Wosnitza, Joachim1, Author
Ruck, Michael2, Author              
Affiliations:
1External Organizations, ou_persistent22              
2Michael Ruck, Max Planck Fellow, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863444              

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 Abstract: The microwave-assisted polyol process was applied and modified to synthesize phase-pure micro- or nanocrystalline samples of all intermetallic phases in the bismuth palladium system. Reaction temperatures range between 170 and 240 degrees C, whereas conventional syntheses from melt necessitate 500 to 1000 degrees C. Reaction times of few minutes up to 1 h are sufficient. Although not stable at the temperature of synthesis, high-temperature phases are accessible as well. Differences in the redox potentials of the two metals have effectively been compensated by adding auxiliaries such as oleylamine, oleic acid, and potassium hydroxide. The samples were characterized by X-ray powder diffraction, scanning electron microscopy, and energy-dispersive electron spectroscopy. Magnetic properties and electrical conductivity of the nanocrystalline samples were measured. The high temperature compound gamma-BiPd showed superconductivity with T-c = 3.2 K. Nanocrystalline nc-Bi2Pd5 revealed an unusual temperature dependence of the electrical conductivity indicating an electronic phase transition at about 230 K. The electronic band structures of gamma-BiPd, Bi2Pd5 Bi12Pd31, and BiPd3 were calculated including spin-orbit coupling.

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Language(s): eng - English
 Dates: 2014-07-23
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: -
 Identifiers: ISI: 000343195600030
DOI: 10.1021/cm502315a
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Title: Chemistry of Materials
  Other : Chem. Mater.
Source Genre: Journal
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Publ. Info: Washington, D.C. : American Chemical Society
Pages: - Volume / Issue: 26 (19) Sequence Number: - Start / End Page: 5640 - 5646 Identifier: ISSN: 0897-4756
CoNE: /journals/resource/954925561571