摘要
运用扫描隧道显微镜（ＳＴＭ）观测了一颗深海铁质宇宙尘球粒的亚微米和纳米结构，并与一块宁波（ⅣＡ）铁陨石的线切割碎片的表面结构进行了对比。通过分形几何学的定量研究，发现在亚微米尺度铁陨石碎片和铁质宇宙尘的表面结构存在自相似性，但铁质宇宙尘与铁陨石线切割碎片的表面分数维特征却明显不同，前者分数维Ｄ值约为２．３，后者Ｄ值为２．６～２．７。这与它们的热动力学过程的差异有关。
Observation into the submicron-nanometer structure for one deep-sea iron cosmic sphere has been done by the use of scanning tunneling microscopy, in comparison with that of a laser-cut fragment of Ninbo iron meteorite. Through quantitative calculation of fractal geometry, self-similarity morphological features in the submicron range were found on the surface of both samples.However, their fractal features were very different,the D-value of the former was about 2. 3 , and that of the latter was 2.6～2.7.The difference in the surface structure of the two samples is explained by difference in their condensation process.
出处
《岩矿测试》
CAS
CSCD
北大核心
1996年第1期1-12,共12页
Rock and Mineral Analysis
基金
国家自然科学基金
关键词
铁质宇宙尘
扫描隧道显微镜
纳米结构
铁损石
iron cosmic dust,scanning tunneling microscopy,fractal,Submicronnanometer structure
