一维硅氧线的水热法制备及光致发光

Preparation of SiO_x Nanowires by Hydrothermal Method and Their Photoluminescence

以SiO粉末为原料,采用水热法成功地制备出一维纳米硅氧线,并通过扫描电子显微镜（SEM）和透射电子显微镜（TEM）观察该一维硅氧线的形貌,可知其直径为100~200nm,长度可以达到几十微米.X射线能谱仪（EDS）定量分析了该一维材料的成分,表明该纳米线由硅和氧两种元素组成.荧光光谱法测试了硅氧线的发光光谱,表明在426和446nm处有较强的发光.通过不同条件下的对比实验得到制备该纳米线的最佳条件,同时根据实验结果提出了该方法制备硅氧线的生长机理.

SiOx nanowires were successfully fabricated by a hydrothermal method using SiO powder as raw material. SEM and TEM photos show that the diameter and the length of these nanowires are about 100~200nm and tens of microns,respectively. EDS was introduced to quantitatively analyze the components and show that SiOx nanowires are only composed of Si and O. The PL spectrum shows that the nanowires have two fluorescent excitations at 426 and 446nm. The best preparation condition has been obtained by a series of contrastive experiments with different conditions. Meanwhile, a mechanism is given in this letter for the synthesis of SiOx nanowires by the hydrothermal method.