电子束蒸发沉积ZAO薄膜正交试验

采用电子束真空蒸发沉积薄膜的方法(EBED)制备了ZnO:Al(ZAO)透明导电薄膜.用正交试验法设计试验,并分析了制备ZAO薄膜的主要影响因素(沉积厚度、沉积速率、基片温度)对薄膜性能(透射率、电阻率)的作用.试验结果表明:采用EBED法沉积制备ZAO薄膜时,沉积速率控制为1nm/s、沉积厚度为800nm、基片温度为2 50℃,镀膜系统工作稳定,沉积薄膜的性能较好.     

Morphology tuning of mono-disperse silver nanoparticles by reaction temperature adjustment

Mono-disperse silver nanoparticles with tunable morphologies have been fabricated by reducing AgNO3 in the presence of N-dimethylformamide (DMF) and larger molecular weight poly(vinylpyrrolidone)(PVP). By adjusting the reaction temperature, the conversion of the morphology can be easily and effectively controlled. The crystal structures and growth mechanism of mono-disperse silver nanoparticles were studied by using TEM, HR-TEM, FFT, XRD and UV-Vis spectra data. The results show that the morphologies of nanoparticles with spherical shape can be adjusted to a truncated triangle/hexagon along with the change of reaction temperature from 80 to 120 ℃. It is found that the shape transformation from sphere to truncated triangle is caused by the difference in surface energy and the selective adsorption of PVP on silver atom.     

金刚石表面化学镀镍沉积速度影响因素分析

研究了以硼氢化钠为还原剂的金刚石表面化学镀N i工艺,重点探讨了镀液主要工艺参数对沉积速度的影响,获得了最佳工艺条件:硼氢化钠1.0 g/L;氯化镍30 g/L;乙二胺60 g/L;温度85℃;pH值13,并用JSM-5610LV型扫描电镜观察了原始金刚石和镀覆后的形貌。     

以低价态钛氧化物制备TiO2薄膜研究

试验以Ti2O3,Ti3O5和TiO2作为初始膜料,在ZZS700-6/G型真空镀膜机上采用O2-离子束辅助蒸发制备氧化钛薄膜.用XRD检测方法确定各种膜料和薄膜的相成分,并全面地分析了各种膜料的蒸发特性和薄膜;用分光光度计测量薄膜的透射率,并分析薄膜的光学性能.试验表明,在采用Ti2O3,Ti3O5和TiO2作为蒸发制备氧化钛薄膜时,钛的氧化物中存在Ti3O5固态同一蒸发相;各种膜料在蒸发时,发生分解,熔池中的物质成分逐渐转变成同一蒸发相成分,最终完全转变成同一蒸发相.