磁响应Fe3O4/PVP/SiO2胶体光子晶体的制备及光学性质
Synthesis and Optical Properties of Magnetically Responsive Fe3O4/PVP/SiO2 Colloidal Photonic Crystals
DOI: 10.12677/APP.2016.64008, PDF, HTML, XML,  被引量 下载: 2,756  浏览: 7,069  国家自然科学基金支持
作者: 韩 平*, 陈昌浩, 张文莹, 蒋文凤, 卢学刚*, 梁工英*：西安交通大学理学院，物质非平衡合成与调控教育部重点实验室，陕西 西安；霍晓莉：中石油东部管道有限公司甘陕管理处，陕西 西安
关键词: 胶体光子晶体；磁响应；结构色；光学性质；超顺磁性；Colloidal Photonic Crystal； Magnetic Response； Structural Color； Optical Property； Superparamagnetism
摘要: 磁响应胶体光子晶体因其具有光子带隙可调、制备简便、响应速度快等特点，在彩色显示、光开关等领域有着重要的应用前景。本文首先采用溶剂热法制备出了Fe3O4/PVP胶体粒子，并利用正硅酸乙酯(TEOS)水解对其表面进行SiO2包覆，得到表面携带负电荷的Fe3O4/PVP/SiO2复合纳米胶体粒子。SEM和TEM测试结果表明，Fe3O4/PVP/SiO2具有单分散特征，平均粒径约为100 nm。VSM测试结果表明，胶体粒子具有超顺磁性，其饱和磁化强度约为26 emu/g。经进一步回流处理后，胶体粒子表面表现明显的负电荷属性，Zeta电势为−48.3 mV。所合成的Fe3O4/PVP/SiO2胶体粒子可在乙腈中均匀分散，所形成的胶体溶液在外加磁场的作用下表现出明亮的结构色，具有明显的磁场可调谐光子带隙特征。
Abstract: Magnetic responsive colloidal photonic crystals have great potential to be used in color display, light swich etc. due to their performance of tunable photonic band-gap, fast response and easy preparation. In this paper, a solvothermal method was used to prepare Fe3O4/PVP colloidal particles and the particles were then coated with SiO2by TEOS hydrolysis to form Fe3O4/PVP/SiO2 composite particles. SEM and TEM results show that as-prepared Fe3O4/PVP/SiO2 particles possess monodisperse characteristics and the mean particle size is about 100 nm. VSM results show that Fe3O4/PVP/SiO2 particles have superparamagnetism and the saturation magnetization Ms is about 26 emu/g. After refluxing treatment in water, the surface of Fe3O4/PVP/SiO2 particles is negatively charged and the Zeta potential is −48.3 mv. As-prepared Fe3O4/PVP/SiO2 particles can be easily dispersed in acetonitrile to form stable suspensions. Under the magnetic field, the Fe3O4/PVP/SiO2 suspension in acetonitrile displays bright structural color and tunable band-gap features.
文章引用：韩平, 陈昌浩, 霍晓莉, 张文莹, 蒋文凤, 卢学刚, 梁工英. 磁响应Fe3O4/PVP/SiO2胶体光子晶体的制备及光学性质[J]. 应用物理, 2016, 6(4): 54-62. http://dx.doi.org/10.12677/APP.2016.64008

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