Ordered Arrays of Magnetic Nanoparticles

摘要9800127 S.卡内基梅隆大学 目的是制备磁性纳米粒子阵列在磁性矩阵，并测量各种形状的纳米粒子的相互作用的磁效应，从球到棒。 一种自组装方法将被用来创建单分散的纳米尺寸的磁性阵列，这些阵列在固化周围的液体后转化为磁性相。 第二种方法将包括涂覆颗粒以控制颗粒间的间距。 铁氧化物被选为原型材料。 将使用各种表征方法来测量单个颗粒的矫顽磁力、磁化方向、Faucault Lorentz显微镜的颗粒间耦合以及磁力显微镜的纳米颗粒矩。 将开发简单的粒子相互作用模型来解释实验结果。 提出的粒子合成方法和粒子间力的研究将为磁数据存储设备的发展提供基础信息。 ***

Abstract 9800127 S. Majetich, Carnegie Mellon University The objective is to prepare magnetic nanoparticle arrays in nonmagnetic matrices, and measure the interaction magnetic effects for various nanoparticle shapes from spheres to rods. A self-assembly method will be used to create monodispersed nano-sized nonmagnetic arrays that are transformed to a magnetic phase after solidifying the surrounding liquid. A second approach will consist in coating the particles in order to control interparticle spacing. Iron oxides are selected as the prototype material. Various characterization methods will be used to measure magnetic coercivity, magnetization directions of individual particles, interparticle coupling with the Faucault Lorentz microscopy, and nanoparticle moments by magnetic force microscopy. Simple particle interaction models will be developed to interpret the experimental results. The proposed particle synthesis methods and the investigation of the interparticle forces will provide fundamental information for development of magnetic data storage equipment. ***