AI Article Synopsis
- A bionanomaterial of palladium was created using the sulfate-reducing bacterium Desulfovibrio desulfuricans to convert soluble Pd(II) ions into a solid form (Pd(0)) with the help of hydrogen.
- Advanced techniques like SQUID and Muon Spin Rotation Spectroscopy (µSR) were used to investigate the magnetic properties of the produced material.
- The findings indicated unique magnetic behaviors linked to the interaction of muons with palladium and hydrogen, with evidence supporting the formation of nanoparticles, marking the first application of µSR for analyzing biologically-derived nanocatalysts.
Article Abstract
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.
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| http://dx.doi.org/10.1007/s10529-011-0532-9 | DOI Listing |
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