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利用紫外光诱导还原金属前躯体硝酸银(AgNO3),直接在聚乙烯醇(PVA)薄膜中生长银纳米颗粒,成功制备出PVA/Ag纳米复合材料薄膜。利用紫外-可见吸收光谱分析了银离子浓度、紫外光辐照功率和辐照时间对薄膜光谱的影响趋势。通过优化硝酸银浓度、辐照条件来调节薄膜中银纳米颗粒的尺寸和空间分布密度,成功地将此复合薄膜的等离子共振吸收峰位调节为406nm,并用于蓝光(405nm)激光直写光刻。扫描电子显微镜(SEM)观察表明,该材料中纳米颗粒分布均匀,粒径分布较窄;X射线光电子谱(XPS)证实了合成的纳米颗粒为单质银;原子力显微镜(AFM)分析显示薄膜光刻后获得了表面清晰、光滑、规整的图形。
The silver nitrate (AgNO3) was reduced by ultraviolet light and the silver nanoparticles were directly grown on the polyvinyl alcohol (PVA) film. The PVA / Ag nanocomposite films were successfully prepared. The influence of silver ion concentration, UV irradiation power and irradiation time on the spectrum of the film was analyzed by UV-Vis absorption spectroscopy. By optimizing the silver nitrate concentration and irradiation conditions, the size and spatial distribution density of silver nanoparticles in the film were adjusted. The peak of plasmon resonance absorption of the composite film was successfully adjusted to 406 nm and used in blue (405 nm) laser direct writing lithography. Scanning electron microscopy (SEM) observations showed that the nanoparticles were uniformly distributed and the particle size distribution was narrow. XPS confirmed the synthesized nanoparticles as elemental silver. AFM analysis showed that the film lithography After the surface was clear, smooth, regular graphics.