| 二氧化硅胶体晶体组装形貌研究 |
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| 引用本文： | 魏苗菊,张坤,陈启明. 二氧化硅胶体晶体组装形貌研究[J]. 化学通报, 2007, 70(3): 207-211 |
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| 作者姓名： | 魏苗菊 张坤 陈启明 |
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| 作者单位： | 华东师范大学化学系,上海,200062;华东师范大学化学系,上海,200062;华东师范大学化学系,上海,200062 |
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| 摘 要： | 用原子力显微镜表征了二氧化硅胶体晶体的组装,探讨了二氧化硅微球用自然沉降法、抽滤法、溶剂挥发法组装时的组装行为,同时讨论了不同颗粒表面电位、不同溶剂介质及不同温度对其组装结果的影响。结果表明,颗粒表面电位是影响二氧化硅胶体晶体有序组装的重要因素之一。文中总结了最优的介质组成和温度条件,指出溶剂挥发法是较优的二氧化硅胶体晶体组装方法,其方法操作简单、周期短、得到的胶态晶体质量高,能在较大面积内高度有序。
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| 关 键 词： | 二氧化硅 组装 AFM |
| 修稿时间： | 2006-06-23 |
Morphology Research on Self-assembly of SiO2 Colloidal Crystals |
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| Wei Miaoju,Zhang Kun,Chen Qiming. Morphology Research on Self-assembly of SiO2 Colloidal Crystals[J]. Chemistry, 2007, 70(3): 207-211 |
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| Authors: | Wei Miaoju Zhang Kun Chen Qiming |
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| Affiliation: | Department of Chemistry, East China Normal University, Shanghai 200062 |
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| Abstract: | Atomic force microscope(AFM) was used as a main observation tool to study the effect of three self-assembly ways of SiO_2 colloidal crystals: free sedimentation,filtration,and solvent evaporation.The influences of surface potential of monodispersed silica particles,solvent composition and temperature were investigated,and surface potential was proved to be the most significant factor in the assembling process.The AFM images identified the optimized assembly conditions in the study.Compared with the other two ways,solvent evaporation has the advantages for its simpler,shorter assembling-time,and especially for highly ordered structure with large area obtained in the products. |
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| Keywords: | Silica Assembly Atomic force microscope |
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