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采用特殊的制样技术并通过扫描电子显微镜和透射电子显微镜观察分析了磁性液体表面形貌和磁性纳米颗粒的排列结构.在外加垂直磁场作用下,磁性液体液膜表面呈现一种准周期性的条带状峰峦分布,内部纳米颗粒呈现出准直线链状定向排布.它们都与外磁场分布、颗粒的磁相互作用及与载液的相互作用有关,且最终受到外磁场分布的制约.
The surface morphology of magnetic liquid and the arrangement of magnetic nanoparticles were analyzed by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) using a special sample preparation technique. Under the application of a vertical magnetic field, the surface of the liquid film showed a quasi- The ridges and peaks of the bands distribute, and the internal nano-particles show a collimated chain-like orientation arrangement, which are related to the distribution of the external magnetic field, the magnetic interaction of the particles and the interaction with the carrier liquid, and are finally restricted by the distribution of the external magnetic field.