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Time-Resolved In Situ Synchrotron X-ray Study and Large-Scale Production of Magnetite Nanoparticles in Supercritical Water

Authors

  • Martin Bremholm Dr.,

    1. Centre for Energy Materials, Department of Chemistry and iNANO, University of Aarhus, Langelandsgade 140, 8000 Aarhus C (Denmark), Fax: (+86) 8619-6199
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  • Marcella Felicissimo Dr.,

    1. Centre for Energy Materials, Department of Chemistry and iNANO, University of Aarhus, Langelandsgade 140, 8000 Aarhus C (Denmark), Fax: (+86) 8619-6199
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  • Bo B. Iversen Prof. Dr.

    1. Centre for Energy Materials, Department of Chemistry and iNANO, University of Aarhus, Langelandsgade 140, 8000 Aarhus C (Denmark), Fax: (+86) 8619-6199
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  • The use of the Advanced Photon Source was supported by the US Department of Energy, Office of Science, Office of Basic Energy Sciences, under contract no. DE-AC02-06CH11357. We thank DANSCATT and SCF Technologies for funding. Jan Skov Pedersen is thanked for providing SAXS fitting software and for fruitful discussions, and Jon Almer and Mogens Christensen for help during the measurements.

Abstract

Allgemeine Lösung: In-situ-Synchrotron-Röntgenbeugung in einem Reaktor, in den pulsförmig Eisenammoniumcitrat bei hohem Druck injiziert wird (siehe Bild), zeigt, dass Magnetitkeimbildung und -wachstum zeitlich getrennt ablaufen. Grammmengen kristalliner, reinphasiger, superparamagnetischer Magnetitnanopartikel wurden ohne Tenside in überkritischem Wasser in weniger als einer Stunde in einem kontinuierlich betriebenen Laborreaktor synthetisiert.

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