Materials Map

Discover the materials research landscape. Find experts, partners, networks.

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The Materials Map is an open tool for improving networking and interdisciplinary exchange within materials research. It enables cross-database search for cooperation and network partners and discovering of the research landscape.

The dashboard provides detailed information about the selected scientist, e.g. publications. The dashboard can be filtered and shows the relationship to co-authors in different diagrams. In addition, a link is provided to find contact information.

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Materials Map under construction

The Materials Map is still under development. In its current state, it is only based on one single data source and, thus, incomplete and contains duplicates. We are working on incorporating new open data sources like ORCID to improve the quality and the timeliness of our data. We will update Materials Map as soon as possible and kindly ask for your patience.

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in Cooperation with on an Cooperation-Score of 37%

Topics

Publications (2/2 displayed)

  • 2013Scaling laws at the nanosize134citations
  • 2011Surface functionalization of magnetic iron oxide nanoparticles for MRI applications - effect of anchoring group and ligand exchange protocol121citations

Places of action

Chart of shared publication
Botta, Mauro
1 / 3 shared
Marjańska, Małgorzata
1 / 2 shared
Rolla, Gabriele A.
1 / 1 shared
Zhou, Yue
1 / 2 shared
Smolensky, Eric D.
2 / 2 shared
Berquó, Thelma S.
1 / 1 shared
Chart of publication period
2013
2011

Co-Authors (by relevance)

  • Botta, Mauro
  • Marjańska, Małgorzata
  • Rolla, Gabriele A.
  • Zhou, Yue
  • Smolensky, Eric D.
  • Berquó, Thelma S.
OrganizationsLocationPeople

article

Surface functionalization of magnetic iron oxide nanoparticles for MRI applications - effect of anchoring group and ligand exchange protocol

  • Park, Hee Yun E.
  • Berquó, Thelma S.
  • Smolensky, Eric D.
Abstract

<p>Hydrophobic magnetite nanoparticles synthesized from thermal decomposition of iron salts must be rendered hydrophilic for their application as MRI contrast agents. This process requires refunctionalizing the surface of the nanoparticles with a hydrophilic organic coating such as polyethylene glycol. Two parameters were found to influence the magnetic behavior and relaxivity of the resulting hydrophilic iron oxide nanoparticles: the functionality of the anchoring group and the protocol followed for the functionalization. Nanoparticles coated with PEGs via a catecholate-type anchoring moiety maintain the saturation magnetization and relaxivity of the hydrophobic magnetite precursor. Other anchoring functionalities, such as phosphonate, carboxylate and dopamine decrease the magnetization and relaxivity of the contrast agent. The protocol for functionalizing the nanoparticles also influences the magnetic behavior of the material. Nanoparticles refunctionalized according to a direct biphasic protocol exhibit higher relaxivity than those refunctionalized according to a two-step procedure which first involves stripping the nanoparticles. This research presents the first systematic study of both the binding moiety and the functionalization protocol on the relaxivity and magnetization of water-soluble coated iron oxide nanoparticles used as MRI contrast agents.</p>

Topics
  • nanoparticle
  • surface
  • iron
  • functionalization
  • magnetization
  • thermal decomposition
  • saturation magnetization