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Precise synthesis of discrete and dispersible carbon-protected magnetic nanoparticles for efficient magnetic resonance imaging and photothermal therapy

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Lu,  A. H.
Dalian Univ Technol, Sch Chem Engn, State Key Lab Fine Chem, Fac Chem Environm & Biol Sci, Dalian 116024, Peoples R China;
Research Department Schüth, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Schüth,  Ferdi
Research Department Schüth, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Citation

Lu, A. H., Zhang, X.-Q., Sun, Q., Zhang, Y., Song, Q., Schüth, F., et al. (2016). Precise synthesis of discrete and dispersible carbon-protected magnetic nanoparticles for efficient magnetic resonance imaging and photothermal therapy. Nano Research, 9(5), 1460-1469. doi:10.1007/s12274-016-1042-9.


Cite as: http://hdl.handle.net/11858/00-001M-0000-002A-F00E-F
Abstract
Carbon-protected magnetic nanoparticles exhibit long-term stability in acid or alkaline medium, good biocompatibility, and high saturation magnetization. As a result, they hold great promise for magnetic resonance imaging, photothermal therapy, etc. However, since pyrolysis, which is often required to convert the carbon precursors to carbon, typically leads to coalescence of the nanoparticles, the obtained carbon-protected magnetic nanoparticles are usually sintered as a non-dispersible aggregation. We have successfully synthesized discrete, dispersible, and uniform carbon-protected magnetic nanoparticles via a precise surface/interface nano-engineering approach. Remarkably, the nanoparticles possess excellent water-dispersibility, biocompatibility, a high T (2) relaxivity coefficient (384 mM(-1)center dot s(-1)), and a high photothermal heating effect. Furthermore, they can be used as multifunctional core components suited for future extended investigation in early diagnosis, detection and therapy, catalysis, separation, and magnetism.