| 题名 | 纳米Ag溶胶及其薄膜的制备和表征; The preparation and characterization of Ag nanoparticles and its film |
| 作者 | 陈丽华 |
| 学位类别 | 硕士 |
| 答辩日期 | 2008-06-02 |
| 授予单位 | 中国科学院广州能源研究所 |
| 授予地点 | 广州能源研究所 |
| 导师 | 徐刚 |
| 关键词 | Ag纳米粒子 sol-gel法 热稳定性 反应动力学 |
| 其他题名 | the preparation and characterization of ag nanoparticles and its film |
| 中文摘要 | nanotechnology was founded in the 1980s, and has been developed to be one of the most promising technologies for the moment. its development is highly dependent on the breakthrough in nanomaterials. as far as noble nanometal is concerned, much work has been done on this optics, among which au and au nanoparticles have been studied relatively more extensively and intensively due to their great potential in a variety of applications. colloidal sols of ag nanoparticles and sio2:nano-ag were fabricated with sol-gel method via redox reactions. the growth kinetics of the nanoparticles in some condition was investigated in real time by the absorbance spectrum of localized surface plasmon resonance (spr) of nano-ag in which the influence of solution temperature was stressed. it reveals that the shift direction (to the red or the blue) of the spr peak varies with the experimental conditions. in some specific cases, the reaction was determined to be zero order, and the reaction rate depending on temperature follows the arrhenius’ law. optical performance and microstructure of the sio2:nano-ag film before and after annealing were characterized by uv-vis, xrd, tg-dsc, ft-ir, tem and so on and we obtained these conclusions. first, we found that appearance of the spr spectrum which indicates the formation of ag nanoparticles depends on the substrate materials used (common glass or quartz glass), probably due to the influence of ion diffusion from the substrate. second, after annealing at 500℃, the film exhibits superior thermal stability. however, the stability becomes worse after annealing at 700℃, mainly due to the escape of ag from the sio2 matrix and then volatilization in the air. |
| 语种 | 中文 |
| 公开日期 | 2011-07-14 ; 2011-07-15 |
| 页码 | 65 |
| 内容类型 | 学位论文 |
| 源URL | [http://ir.giec.ac.cn/handle/344007/5804]  |
| 专题 | 中国科学院广州能源研究所 |
| 推荐引用方式 GB/T 7714 | 陈丽华. 纳米Ag溶胶及其薄膜的制备和表征, The preparation and characterization of Ag nanoparticles and its film[D]. 广州能源研究所. 中国科学院广州能源研究所. 2008. |
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