磁性液体是磁可控的稳定胶体体系，在磁场作用下可形成直径0.1-2微米六角排列的微观链状结构，能构建光子晶体，目前众多磁性液体光子晶体的研究中只能做到微观结构的几何参数可调，对于介质介电比的调节还没有涉及。本研究期望改进磁性液体中纳米颗粒的表面介电性，实现构建具有微结构几何参数和介质介电比可调的磁性液体光子晶体。对颗粒表面进行导电的有机半导体包覆，通过对颗粒粒径控制和包覆的颗粒表面亲水性和抗团聚处理，制备出具有一定磁致导电能力的新型水基磁性液体，由于有机半导体的掺杂剂具有亲水性和排斥性，使得这种磁性液体的光子晶体构建成为可能。从制备上看，体现了有机-无机杂化纳米核壳颗粒制备和胶体化技术；从磁性液体构成角度看，这是一种功能复合型的"纯"磁性液体，而不是为了复合其它功能而掺入其它颗粒的复合磁性液体；这种新型磁性液体将丰富这一类液体材料的制备技术和拓展磁性液体在光电器件、吸波隐身领域的应用范围。

Magnetic liquid is a magnet-controlled stable colloidal system. Under the action of magnetic field the magnetic fluid can form six angular alignment of the microscopic chain structure with a diameter of 0.1 to 2 microns, which will be able to build photonic crystal. At present a number of researches on magnetic liquid photonic crystal can only adjust microstructure geometric parameters. The dielectric ratio adjustment is not involved. This study expects to improve the surface dielectric of the magnetic liquid nanometer particles, construct both the micro structure parameters and the adjustable dielectric ratio magnetic liquid photonic crystal. The novel water-based magnetic liquid with the magnetic conductive capability is prepared by coating the conductive organic semiconductor on the particle surface, controlling the coated particle size and processing the coated particle surface hydrophilic and anti-agglomeration. Because the doped organic semiconductor is hydrophilic and exclusive, the construction of magnetic liquid photonic crystal is possible. From the magnetic liquid preparation, the study embodies the organic-inorganic hybrid nanometer core-shell particle preparation and colloid technology. From the perspective of magnetic liquid composition, this is a function of the compound "pure" magnetic liquid, but not other function and compound mixed with other particles in the composite magnetic liquid. This novel magnetic liquid will enrich the liquid material preparation technology and develop the application scope of the magnetic liquid in optoelectronic devices and wave-absorbing stealthy field.