三维SiO_2欧泊模板溶剂热法制备硫化锌光子晶体  

Three-dimensional Silica Opals Templating for Synthesis of ZnS Photonic Crystals via Solvothermal Approach

作　　者：曹洁明[1] 常欣[1] 郑明波[1] 黄海宾[1] 季红梅[1] 刘劲松[1] 柯行飞[1] 

机构地区：[1]南京航空航天大学材料科学与技术学院纳米材料研究所,南京210016

出　　处：《物理化学学报》2005年第5期560-564,共5页Acta Physico-Chimica Sinica

基　　金：江苏省自然科学基金(BK2002414)资助项目~~

摘　　要：以单分散二氧化硅微球在重力场下自组装得到的三维有序欧泊(opal)为模板,采用溶剂热法在模板空隙内生长ZnS晶体,从而制备高质量的硫化锌基光子晶体.通过X射线衍射(XRD)和Raman光谱证明ZnS晶体为闪锌矿结构且晶体质量较好,并对其生长机理进行了讨论.通过场发射扫描电子显微镜(FESEM)和紫外-可见分光光度计对所合成的ZnS/opal复合物与ZnS反欧泊结构进行了表征,结果表明两种结构都保持了欧泊三维有序性,并且在Г-L方向(垂直于(111)方向)上出现了布拉格衍射峰,说明其具有良好的光子晶体特性.ZnS photonic crystals were prepared by using silica collodial crystals as templates and infiltrating with ZnS semiconductor nanocrystals in opal templates via solvothermal approach, Solvothermal method offers several advantages over previous techniques including homogenous ZnS growth within the opal voids and high quality of the obtained ZnS nanocrystals. XRD patterns and Raman spectroscopy results confirmed the ZnS nanocrystals to be zinc blende, and the mechanism of ZnS crystal growth in opals was discussed. FESEM images and UV-Vis transmission spectra showed that the as-obtained ZnS/opal system and ZnS inverse opal kept the three-dimensional ordered structure of the opals. The appearance of Bragg diffraction peak at F-L direction (the direction normal to the (111) planes) indicated that the two structures had excellent photonic crystals properties. Furthermore, the optical properties of the infiltrated opals with different ZnS filling ratios are also studied by transmission spectroscopy. It is proposed that the position of the stop band can be easily designed by controlling the infiltration ratio of ZnS. These results demonstrated an easy-to-handle and efficient route to obtain high performance photonic crystal structures. The material system is believed to have potential applications in optoelectronic and photonic devices.

关 键 词：光子晶体 溶剂热 自组装 ZNS 欧泊 

分 类 号：O614.24[理学—无机化学]