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dc.creatorTromsdorf, Ulrich I.
dc.creatorBigall, Nadja C.
dc.creatorKaul, Michael G.
dc.creatorBruns, Oliver T.
dc.creatorNikolić, Marija
dc.creatorMollwitz, Birgit
dc.creatorSperling, Ralph A.
dc.creatorReimer, Rudolph
dc.creatorHohenberg, Heinz
dc.creatorParak, Wolfgang J.
dc.creatorForster, Stephan
dc.creatorBeisiegel, Ulrike
dc.creatorAdam, Gerhard
dc.creatorWeller, Horst
dc.date.accessioned2021-03-10T10:48:06Z
dc.date.available2021-03-10T10:48:06Z
dc.date.issued2007
dc.identifier.issn1530-6984
dc.identifier.urihttp://TechnoRep.tmf.bg.ac.rs/handle/123456789/1165
dc.description.abstractSuperparamagnetic MnFe2O4 nanocrystals of different sizes were synthesized in high-boiling ether solvent and transferred into water using three different approaches. First, we applied a ligand exchange in order to form a water soluble polymer shell. Second, the particles were embedded into an amphiphilic polymer shell. Third, the nanoparticles were embedded into large micelles formed by lipids. Although all approaches lead to effective negative contrast enhancement, we observed significant differences concerning the magnitude of this effect. The transverse relaxivity, in particular r(2)*, is greatly higher for the micellar system compared to the polymer-coated particles using same-sized nanoparticles. We also observed an increase in transverse relaxivities with increasing particle size for the polymer-coated nanocrystals. The results are qualitatively compared with theoretical models describing the dependence of relaxivity on the size of magnetic spheres.en
dc.publisherAmer Chemical Soc, Washington
dc.rightsrestrictedAccess
dc.sourceNano Letters
dc.titleSize and surface effects on the MRI relaxivity of manganese ferrite nanoparticle contrast agentsen
dc.typearticle
dc.rights.licenseARR
dc.citation.epage2427
dc.citation.issue8
dc.citation.other7(8): 2422-2427
dc.citation.rankaM21
dc.citation.spage2422
dc.citation.volume7
dc.identifier.doi10.1021/nl071099b
dc.identifier.pmid17658761
dc.identifier.scopus2-s2.0-34548171034
dc.identifier.wos000248657800045
dc.type.versionpublishedVersion


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