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首页> 外文期刊>The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical >Synthesis and evolution of PbS nanocrystals through a surfactant-assisted solvothermal route
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Synthesis and evolution of PbS nanocrystals through a surfactant-assisted solvothermal route

机译：通过表面活性剂辅助溶剂热途径合成和合成PbS纳米晶体

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摘要

We present a surfactant-assisted solvothermal approach for the controllable synthesis of a PbS nanocrystal at low temperature (85 degrees C). Nanotubes (400 nm in length with an outer diameter of 30 nm), bundle-like long nanorods (about 5-15 mu m long and an average diameter of 100 nm), nanowires (5-20 mu m in length and with a diameter of 20-50 nm), short nanorods (100-300 nm in length and an axial ratio of 5-10), nanoparticles (25 nm in width with an aspect ratio of 2), and nanocubes (a short axis length of 10 nm and a long axis length of 15 nm) were successfully prepared and characterized by transmission electron microscopy, scanning electron microscopy, and powder X-ray diffraction pattern. A series of experimental results indicated that several experimental factors, such as AOT concentration, ratio of [water]/[surfactant], reaction time, and ratio of the reagents, play key roles in the final morphologies of PbS. Possible formation mechanisms of PbS nanorods and nanotubes were proposed.
机译：我们提出了一种表面活性剂辅助溶剂热法，用于在低温（85摄氏度）下可控合成PbS纳米晶体。纳米管（长度为400 nm，外径为30 nm），束状长纳米棒（约5-15μm，平均直径为100 nm），纳米线（长度为5-20μm，直径） 20-50 nm），短纳米棒（长度为100-300 nm，轴向比率为5-10），纳米颗粒（宽度为25 nm，纵横比为2）和纳米立方体（短轴长度为10 nm）并成功地制备了长轴长度为15 nm的样品，并通过透射电子显微镜，扫描电子显微镜和粉末X射线衍射图对其进行了表征。一系列实验结果表明，几个实验因素，如AOT浓度，[水] / [表面活性剂]的比例，反应时间和试剂的比例，在PbS的最终形态中起关键作用。提出了可能的PbS纳米棒和纳米管的形成机理。

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