The Preparation of Silver Nanowires with High Yield and Research of Thin Film Performance

本文利用水热法制备高产率金属银纳米线，以硝酸银为银源，表面活性剂聚乙烯吡咯烷酮为形貌导向剂，以铁的化合物为反应物。通过研究水热法条件，如反应物浓度、反应物种类和摩尔比等对纳米线产率和尺度的影响，筛选出最好的制作银纳米线方案。并将使用最佳配比水热法获得的银纳米线与油浴法获得的银纳米线相比较，利用X射线衍射仪表征样品的结构与纯度。利用不同长径比的银纳米线制备透明导电薄膜，利用紫外可见分光光度计和四探针测试仪表征薄膜的光电性能，在相同透过率的情况下，利用长径比更高的纳米线可获得电学性能更为优异的透明导电薄膜。 In this paper, the high yield metal silver nanowires were prepared by hydrothermal method with silver nitrate as the silver source, the surfactant polyvinylpyrrolidone as the topical guide, and the iron compound as the reactant. The best preparation of silver nanowire was screened by hydrothermal conditions such as reactant concentration, reactant type and mole ratio. The silver nanowires obtained with the optimum ratio hydrothermal method were compared with the silver nanowires obtained by the oil bath method. And the structure and purity of the samples were analyzed by using X-ray diffraction instruments. Some transparent conductive film was prepared by using silver nanowires with different diameters. The photoelectric properties of the films were characterized by UV visible spectrophotometer and four-probe tester. The transparent conductive films with better electrical properties can be obtained by using a nanowire with excellent long diameter ratio at the same transmittance.