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Your search keyword '"Wincott, Paul L."' showing total 17 results
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6. Biosynthesis of Zinc Substituted Magnetite Nanoparticles with Enhanced Magnetic Properties

Author

Byrne, James M., primary, Coker, Victoria S., additional, Cespedes, Eva, additional, Wincott, Paul L., additional, Vaughan, David J., additional, Pattrick, Richard A. D., additional, van der Laan, Gerrit, additional, Arenholz, Elke, additional, Tuna, Floriana, additional, Bencsik, Martin, additional, Lloyd, Jonathan R., additional, and Telling, Neil D., additional

Published
2013
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11. Biosynthesis of Zinc Substituted Magnetite Nanoparticles with Enhanced Magnetic Properties.

Author

Byrne, James M., Coker, Victoria S., Cespedes, Eva, Wincott, Paul L., Vaughan, David J., Pattrick, Richard A. D., van der Laan, Gerrit, Arenholz, Elke, Tuna, Floriana, Bencsik, Martin, Lloyd, Jonathan R., and Telling, Neil D.

Subjects
BIOSYNTHESIS, MAGNETIC properties of nanoparticles, BIOCHEMICAL templates, CHEMICAL biology, MAGNETITE, BIOCHEMICAL engineering
Abstract

The magnetic moments of magnetite nanoparticles are dramatically enhanced through the addition of zinc in a microbiologically driven synthesis procedure. The particles are produced through the reduction of Fe(III)-compounds containing Zn(II) by the iron reducing bacterium Geobacter sulfurreducens. Results indicate a significant increase in the saturation magnetization by over 50% compared to magnetite at both room and low temperatures for relatively minor quantities of zinc substitution. A maximum saturation magnetization of nearly 100 emu g−1 of sample is measured at room temperature. Analysis of the cation site ordering reveals a complex dependence on the Zn content, with the combined effect of Zn substitution of Fe3+ ions on tetrahedral sites, together with Fe2+ cation oxidation, leading to the observed magnetization enhancement for low Zn doping levels. The improved magnetic properties give superior performance in MRI applications with an MRI contrast enhancement among the largest values reported, being more than 5 times larger than a commercial contrast agent (Feridex) measured under identical conditions. The synthesis technique applied here involves an environmentally benign route and offers the potential to tune the magnetic properties of magnetic nanoparticles, with increased overall magnetization desirable for many different commercial applications. [ABSTRACT FROM AUTHOR]

Published
2014
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12. EXAFS studies of SrSn1−xSbxO3 and BaPb1−xBixO3

Author

Flavell, Wendy R., primary, Mian, Michael, additional, Roberts, Adam J., additional, Howlett, Julian F., additional, Sarker, Md. Moinuddin, additional, Wincott, Paul L., additional, Bilsborrow, Robert L., additional, and van Dorssen, Gert, additional

Published
1997
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13. Electronic structure, reactivity and solid-state chemistry of La2 –xSrxNi1 –yFeyO4 +δ

Author

Howlett, Julian F., primary, Flavell, Wendy R., additional, Thomas, Andrew G., additional, Hollingworth, Jane, additional, Warren, Samantha, additional, Hashim, Zulkifli, additional, Mian, Michael, additional, Squire, Steven, additional, Aghabozorg, Hamid R., additional, Sarker, Md. Moinuddin, additional, Wincott, Paul L., additional, Teehan, David, additional, Downes, Stuart, additional, Law, Daniel S-L., additional, and Hancock, Frederick E., additional

Published
1996
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14. Corrigendum

Author

Flavell, Wendy R., primary, Morris, Belinda C., additional, Tweddell, Ian, additional, Purdie, Douglas, additional, Thornton, Geoff, additional, Wincott, Paul L., additional, and Bilsborow, Robert L., additional

Published
1993
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