磁响应光子晶体可控制备的研究

Study on Controllable Preparation of Magnetic Response Photonic Crystals

采用改进的溶剂热法通过改变前驱体中Fe2+的添加量制备了具有可调光子带隙的磁响应纳米Fe3O4。通过红外光谱(FT-IR)、X射线衍射仪(XRD)、Zeta粒度仪(DLS)、振动样品磁强计(VSM)和光纤光谱仪对产物的结构和性能进行表征。结果表明,制备的纳米Fe3O4粒径均一,具有良好单分散性和超顺磁性;纳米Fe3O4初级晶粒和次级粒子的尺寸可以由Fe2+添加量来控制,当增大Fe2+的含量时,产物初级晶粒和次级粒子的尺寸随n(Fe2+)的增大而减小,同时,结晶度随之增大。此方法为实现磁响应光子晶体的可控制备提供了一种新的思路。

A modified solvothermal method was used to prepare magnetic responsive photonic crystals with a tunable photonic band gap by changing the content of ferrous ions in the precursor.The structure and properties of the product were characterized by infrared spectroscopy(FT-IR),X-ray diffractometry(XRD),Zeta particle size analyzer(DLS),vibrating sample magnetometer(VSM)and fiber optic spectrometer.The experimental results indicate that the nano-Fe3 O4 has uniform particle size,good monodispersity and superparamagnetism.Besides,the primary crastal size and particle size of the nano-Fe3 O4 can be controlled by the amount of Fe2+in the precursor.When the content of Fe2+increases,the sizes of the primary crystal grain and secondary particle gradually decrease,as well as the crystallinity increases.This method provides a new idea for the controllable preparation of magnetically responsive photonic crystals.