非水纳米分散系的冷冻蚀刻电镜表征及与激光散射法的对比研究  

In-situ Synthesis of a Non-aqueous Nano-dispersion System by the Modified Freeze-Etching Method and Its Characterization by Freeze-Etching Replication Transmission Electron Microscopy

作　　者：肖鹏[1] 欧忠文[1] 张云怀[1] 徐滨士[2] 丁培道[1] 

机构地区：[1]重庆大学数理学院,重庆400044 [2]解放军装甲兵工程学院装备再制造技术国防科技重点实验室,北京100072

出　　处：《分析测试学报》2006年第3期35-38,共4页Journal of Instrumental Analysis

基　　金：国家自然科学基金资助项目(50572121);重庆市自然科学基金资助项目(CSTC2005BB4177)

摘　　要：报道了利用改进的冷冻蚀刻制样技术对非水介质中原位合成的纳米分散系进行的电子显微镜表征结果。研究了冷冻蚀刻电镜技术观测原位合成纳米分散系的制样步骤、制样方法,并利用冷冻蚀刻电镜技术原位观测了3种纳米分散相的粒径、粒径分布和聚集状态。激光散射法与冷冻蚀刻电镜表征的对比表征结果表明:纳米分散系中纳米相的粒径和粒径分布用两种表征方法所得结果基本一致,但冷冻蚀刻电镜表征与激光散射法相比具有准确、直观、清晰、立体的特点,并且可同时采集多种信息。与激光散射法相比,是一种表征非水纳米分散系的理想方法。A method for the in-situ synthesis of non-aqueous nano-dispersion system for specimen preparation using the modified freeze-etching method was reported. The particle size, the particle size distribution and aggregation state in the nano-dispersion phase were then characterized by the freeze-etching replication transmission electron microscopy（FERTEM）. The results showed that the particle size and the particle size distribution characterized by FERTEM were the same as those characterized by the laser scattering method, but the former was more accurate, visual, distinct and steric, and could collect multi-information simultaneously. FERTEM is an ideal method for characterizing the non-aqueous nano-dispersion system.

关 键 词：原位合成 非水纳米分散系 冷冻蚀刻 冷冻蚀刻电镜 激光散射法 

分 类 号：O766.1[理学—晶体学] TQ427[化学工程]