Full access to nanoscale bismuth - Palladium intermetallics by low-temperature syntheses

Heise M, Chang JH, Schoenemann R, Herrmannsdoerfer T, Wosnitza J, Ruck M (2014)

Publication Type: Journal article

Publication year: 2014

Journal

Chemistry of Materials American Chemical Society

Book Volume: 26

Pages Range: 5640-5646

Journal Issue: 19

DOI: 10.1021/cm502315a

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 °C, whereas conventional syntheses from melt necessitate 500 to 1000 °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 γ-BiPd showed superconductivity with Tc = 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 γ-BiPd, Bi2Pd5, Bi12Pd31, and BiPd3 were calculated including spin - orbit coupling. (Graph Presented).

Involved external institutions

Technische Universität Dresden DE Germany (DE) Helmholtz-Zentrum Dresden-Rossendorf (HZDR) DE Germany (DE)

How to cite

APA:

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. https://doi.org/10.1021/cm502315a

MLA:

Heise, Martin, et al. "Full access to nanoscale bismuth - Palladium intermetallics by low-temperature syntheses." Chemistry of Materials 26.19 (2014): 5640-5646.

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