Local magnetism in palladium bionanomaterials probed by muon spectroscopy
| Autor: | I.P. Mikheenko, N.J. Creamer, Lynne E. Macaskie, Stephen P. Cottrell, Clive Johnson |
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| Přispěvatelé: | Unit of Functional Bionanomaterials, School of Biosciences, University of Birmingham [Birmingham], ISIS Neutron and Muon Source (ISIS), STFC Rutherford Appleton Laboratory (RAL), Science and Technology Facilities Council (STFC)-Science and Technology Facilities Council (STFC) |
| Jazyk: | angličtina |
| Rok vydání: | 2011 |
| Předmět: |
[SDV.BIO]Life Sciences [q-bio]/Biotechnology
Magnetism Analytical chemistry chemistry.chemical_element Metal Nanoparticles Bioengineering 02 engineering and technology Electron 010501 environmental sciences Muon spin rotation spectroscopy 01 natural sciences Applied Microbiology and Biotechnology law.invention Magnetization Magnetics Palladium bionanoparticles law [INFO.INFO-BT]Computer Science [cs]/Biotechnology Spectroscopy 0105 earth and related environmental sciences Muon Mesons Chemistry Spectrum Analysis General Medicine Muon spin spectroscopy 021001 nanoscience & nanotechnology SQUID Electronic magnetism Chemical physics Nanoparticles Desulfovibrio 0210 nano-technology Palladium Biotechnology Hydrogen |
| Zdroj: | Biotechnology Letters Biotechnology Letters, Springer Verlag, 2011, 33 (5), pp.969-976. ⟨10.1007/s10529-011-0532-9⟩ |
| ISSN: | 0141-5492 1573-6776 |
| DOI: | 10.1007/s10529-011-0532-9⟩ |
| Popis: | Palladium bionanomaterial was manufactured using the sulfate-reducing bacterium, Desulfovibrio desulfuricansm, to reduce soluble Pd(II) ions to cell-bound Pd(0) in the presence of hydrogen. The biomaterial was examined using a Superconducting Quantum Interference Device (SQUID) to measure bulk magnetisation and by Muon Spin Rotation Spectroscopy (µSR) which is uniquely able to probe the local magnetic environment inside the sample. Results showed behaviour attributable to interaction of muons both with palladium electrons and the nuclei of hydrogen trapped in the particles during manufacture. Electronic magnetism, also suggested by SQUID, is not characteristic of bulk palladium and is consistent with the presence of nanoparticles previously seen in electron micrographs. We show the first use of μSR as a tool to probe the internal magnetic environment of a biologically-derived nanocatalyst material. |
| Databáze: | OpenAIRE |
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