【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。更多还原

【Abstract】 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.更多还原