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Freeze-etching Replication Transmission Electron Microscopy In-situ Observation of the Non-aqueous Nano-dispersion System
Ou Zhongwen1,2,3, Xu Binshi1, Wang Libo2, Liu Weimin2, Ding Peidao4, Ma Shining1
1.State Key Lab of Remanufacture Technology, Armored Force Engineering Institute, Beijing 100072;2.State Key Lab of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000;3.College of Material Science and Engine;4.College of Material Science and Engineering , Chongqing University, Chongqing 400016
Abstract:
The step and approach of specimen making for freeze-etching replication transmission electron microscopy (FERTEM) that was used for the in-situ observation of in-situ synthesizing nano-dispersion system were studied. The diameter, diameter distribution and conglomeration behavior of nano particles in foursorts of dispersion system were observed by FERTEM technique. The results indicated that the image qualityof transmission electronmicroscopy was closely related to the freeze-ecthing time, and the freeze-ecthing time should correspond to the content and diameter of nanoparticles in the dispersion system. The FERTEM technique provided a reliable means for thein-situ observation of the non-aqueous nano-dispersion system, and can collect manifold information simultaneously.
Key words:  Non-aqueous nano-dispersion system,Freeze-etching,Freeze-etching replication transmission electron microscopy
FundProject:国家重点基础研究专项经费(G1999065009)和中国科学院兰州化学物理研究所固体润滑国家重点实验室资助课题.
非水纳米分散系的冷冻蚀刻电镜原位观测
欧忠文,徐滨士,王李波,刘维民,丁培道,马世宁
1.解放军装甲兵工程学院,再制造技术国防重点实验室,北京,100072;2.中国科学院兰州化学物理所,固体润滑国家重点实验室,兰州,730000;3.重庆大学材料科学与工程学院,重庆,400044
摘要:
研究了冷冻蚀刻电镜技术原位观测合成的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四种纳米分散系中分散相的粒度、粒度分布和聚集状态.研究结果表明:蚀刻时间对电镜照片图像质量有较大影响,蚀刻时间应根据分散系中分散相含量、粒度大小来选;冷冻蚀刻电镜用于原位观测非水纳米分散系,具有准确、直观、清晰、立体的特点,并且可同时采集多种信息.
关键词:  原位合成  非水纳米分散系  冷冻蚀刻  冷冻蚀刻电镜
DOI:10.1088/1674-0068/15/6/457-460
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