Stolarczyk Jacek K, Meledandri Carla J, Clarke Sarah P, Brougham Dermot F
Photonics and Optoelectronics Group, Department of Physics and Center for NanoScience (CeNS), Ludwig-Maximilians-Universität München, Amalienstr. 54, 80799 Munich, Germany and Nanosystems Initiative Munich (NIM), Schellingstr. 4, 80799 Munich, Germany.
Department of Chemistry and MacDiarmid Institute for Advanced Materials and Nanotechnology, University of Otago, Dunedin, New Zealand.
Chem Commun (Camb). 2016 Nov 8;52(91):13337-13340. doi: 10.1039/c6cc05871j.
We present a novel approach for the preparation of magnetic nanoparticle clusters of controlled size and selectable magnetic anisotropy, which provides materials with properties selectable for biomedical applications and as components in magnetically responsive nanocomposites. The assembly process is based on a ligand desorption strategy and allows selection of nanoparticle size and temporal control over final cluster size. Detailed NMR analysis of the suspensions pinpoints the role of particle size in controlling the interparticle interactions, within the clusters, which effectively determine the anisotropy. Colloidal interaction modelling confirms this interpretation and provides a means to predict both colloidal stability and magnetic anisotropy.
我们提出了一种制备尺寸可控且磁各向异性可选择的磁性纳米颗粒簇的新方法，该方法可为生物医学应用提供具有可选择特性的材料，并作为磁响应纳米复合材料的组分。组装过程基于配体解吸策略，可选择纳米颗粒尺寸并对最终簇尺寸进行时间控制。对悬浮液进行的详细核磁共振分析确定了颗粒尺寸在控制簇内颗粒间相互作用中的作用，而这种相互作用有效地决定了各向异性。胶体相互作用建模证实了这一解释，并提供了一种预测胶体稳定性和磁各向异性的方法。
