用于蓝光(405nm)激光直写的聚乙烯醇/银纳米复合材料薄膜的制备

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。

Preparation of Polyvinyl Alcohol (PVA)/Siver (Ag) Nanocomposite Film Applied in Laser Direct Writing of Blue Ray (405 nm)

Polyvinyl alcohol (PVA)/Ag nanocomposite films are successfully prepared. Silver nanoparticles are generated directly in PVA matrix by reduction of metallic precursor silver nitrate (AgNO3) with UV-irradiation. UV-visible spectra of the films show effects of silver ion concentration, irradiation power and irradiation time on preparation of silver nanoparticles. Size and space distribution density of the Ag nanoparticles can be controlled by varing irradiation condition combined with adjusting concentration of Ag+ ion. So the surface plasmon resonance peak of the film can be shifted to 406 nm, matching very well with laser wavelength of 405 nm in optical recording system. Scanning electron microscope (SEM) images show narrow size distribution and uniform, intensive, and relatively independent dispersion of the obtained nanoparticles which is pure silver confirmed by X-ray photoelectron spectroscopy (XPS) analysis. Atomic force microscope (AFM) scans reveal that laser direct write carries out successfully on the films.