纳米银导电膜的制备及其光谱学分析

为了以温和的化学反应制备纳米银导电膜，在PET薄膜上涂布柠檬酸银乳液，并用抗坏血酸(Vc)还原，用红外光谱仪、紫外-可见光分光光度计、X射线衍射仪(XRD)、扫描电子显微镜、原子力显微镜等，研究柠檬酸银乳液及其还原涂层的微观形貌、晶体结构和导电性能。发现PVP保护的柠檬酸银乳液粒径分布在60～150 nm。银膜的UV-Vis吸收峰位于430 nm，表明其具有纳米结构。XRD分析表明，还原后的涂层形成了不完整的银晶体，水洗比乙醇处理更能促进柠檬酸银的彻底还原和银膜的晶型完善，降低银膜表面电阻。

Preparation and Study on the Spectra of Conductive Nano-Silver Film

The preparation and study on the spectra of conductive nano-silver film were done under mild conditions.The silver citrate emulsion coating on the surface of PET was reduced by ascorbic acid(Vc) aqueous solution to prepare a silver film. The morphology,crystal structure,surface roughness and conductivity of the silver film were measured by FTIR,UV-Vis spectrum,X-ray diffraction(XRD),scanning electron microscope,scanning probe microscope system and so on.It was found that the silver citrate emumsion has a homogenous particle distribution from 60 nm-150 nm.The UV-Vis spectrum of the silver film shows a peak at 430 nm,and the silver thin film was considered to have a typical nano-scale structure.By the comparison of the XRD patterns of the films treated and untreated with water,it was concluded that the further deoxidization of silver citrate could be accelerated by water.The crystal structure of the silver film was improved and the surface resistance of the silver film was decreased greatly.The effect of ethanol on the decrease in the resistance of the silver film is much less than that of water.