Magnetic Decoupling of Surface Fe3+ in Magnetite Nanoparticles upon Nitrocatechol-Anchored Dispersant Binding

被引：14

作者：

Amstad, Esther ^{[2
]}

Fischer, Hakon ^{[3
]}

Gehring, Andreas U. ^{[3
]}

Textor, Marcus ^{[2
]}

Reimhult, Erik ^{[1
,2
]}

机构：

[1] Univ Nat Resources & Life Sci BOKU, Dept Nanobiotechnol, A-1190 Vienna, Austria

[2] ETH, Dept Mat Sci, CH-8093 Zurich, Switzerland

[3] ETH, Inst Geophys, Dept Earth Sci, CH-8092 Zurich, Switzerland

来源：

CHEMISTRY-A EUROPEAN JOURNAL | 2011年 / 17卷 / 27期

关键词：

ESR spectroscopy; nanoparticle stabilization; magnetic properties; nitrocatechol; surfactants; SUPERPARAMAGNETIC IRON-OXIDE; RESONANCE; CATECHOL; ADHESIVE;

D O I：

10.1002/chem.201003504

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Bind and distort: NitroDOPA, an anchor shown to irreversibly couple dispersants and functional groups to superparamagnetic Fe3O 4 nanoparticles, can magnetically decouple Fe3+ in a nanoparticle surface layer. The strong binding of nitroDOPA distorts the Fe 3+ ligand field. This ESR finding sheds light on an important binding mechanism of anchors used for nanoparticle surface modification (see graphic). Copyright © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

引用

页码：7396 / 7398

页数：3

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