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Assembly of magnetically tunable photonic crystals in nonpolar solvents
Assembly of magnetically tunable photonic crystals in nonpolar solvents
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机译:在非极性溶剂中组装可磁调谐的光子晶体
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摘要
A method of assembling superparamagnetic colloids into ordered structures with magnetically tunable photonic properties in nonpolar solvents by establishing long-range electrostatic repulsive forces using charge control agents. Reverse micelles resulted from the introduction of charge control agents such as AOT molecules can enhance the charge separation on the surfaces of n-octadecyltrimethoxysilane modified Fe3O4@SiO2 particles. The significantly improved long-range electrostatic repulsion can counterbalance the magnetically induced attraction and therefore allow ordering of superparamagnetic colloids in nonpolar solvents. This system possesses fast and fully reversible optical response to the external magnetic fields, long-term stability in performance, and good diffraction intensity.
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机译:一种通过使用电荷控制剂建立远距离静电排斥力,将超顺磁性胶体组装成具有在非极性溶剂中具有磁性可调光子特性的有序结构的方法。引入电荷控制剂(如AOT分子)产生的反胶束可以增强正十八烷基三甲氧基硅烷改性的Fe 3 Sub> O 4 Sub> @SiO 表面上的电荷分离2 Sub>个粒子。显着改善的远距离静电排斥力可以抵消磁感应的吸引力,因此可以使非极性溶剂中的超顺磁性胶体有序化。该系统具有对外部磁场的快速且完全可逆的光学响应,性能的长期稳定性以及良好的衍射强度。
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