层状溶致相中的磁性纳米棒
Magnetic Nanorods Confined in a Lamellar Lyotropic Phase
摘要：
非离子表面活性剂C $_{12}$ EO $_5$的稀层状相掺杂有针铁矿（氧化铁）纳米棒，最高达5体积%的分数。夹杂物和主机相之间的相互作用进行了研究，通过偏光显微镜（有或没有施加磁场）和小角度X射线散射。我们发现，当纳米棒的取向被修改使用的磁场，纹理的层状相的变化相应的，因此可以诱导一个垂直平面的重取向转变。另一方面，层状相诱导纳米棒之间的吸引相互作用。在更集中的层状相（在更强的约束下）中，颗粒形成聚集体。这种行为是没有遇到一个类似的系统与球形粒子掺杂，强调粒子形状的掺杂粒子和主相之间的相互作用的作用。
英文摘要：
The dilute lamellar phase of the nonionic surfactant C$_{12}$EO$_5$ was doped with goethite (iron oxide) nanorods up to a fraction of 5 vol. %. The interaction between the inclusions and the host phase was studied by polarized optical microscopy (with or without an applied magnetic field) and by small-angle X-ray scattering. We find that, when the orientation of the nanorods is modified using the magnetic field, the texture of the lamellar phase changes accordingly; one can thus induce a homeotropic-planar reorientation transition. On the other hand, the lamellar phase induces an attractive interaction between the nanorods. In more concentrated lamellar phases (under stronger confinement) the particles form aggregates. This behavior is not encountered for a similar system doped with spherical particles, emphasizing the role of particle shape in the interaction between doping particles and the host phase.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
