有机溶剂法合成PbSe纳米立方块及其光学性质研究

用甲酰胺作溶剂和配位剂，通过温和的溶剂热路线成功地大量合成了PbSe纳米立方块．运用一系列技术手段，如粉末X光衍射（XRD）、透射电子显微术（TEM）、X光电子能谱（XPS）和傅立叶变换红外光谱等对所合成的PbSe立方块进行表征．纳米立方块的平均颗粒尺寸约为20nm．相对于100]，111]方向较快的生长速率导致了纳米立方块的形成，并提出了可能的生长机理，同时，对所得产物的光学性质进行研究，可能由于纳米颗粒的量子效应，吸收光谱出现蓝移现象．

Synthesis and optical property of PbSe nanocubes via a facile organic solvent route

Lead selenide nanocubes were successfully prepared on a large scale via a facilesolvothermal route using formamide as both solvent and complexing agent. The obtainednanocubes were characterized by a variety of techniques, such as powder X-ray diffraction(XRD), transmission electron microscopy (TEM), X-ray photoelectron spectra (XPS) andfourier-transformed infrared (FT-IR). The average particle size of the nanocubes is about 20 nm.A higher growth rate in the 111] direction compared to that in the 100] direction results in theformation of nanocubes. And a possible growth mechanism was proposed. The optical propertyof the resulting PbSe nanocubes was examined. The blue-shift phenomenon might be ascribed tothe quantum effect of the nanocubes.