Some Experiments on Structural Instability of Small Particles of Metals
Some Experiments on Structural Instability of Small Particles of Metals
复制标题
小金属颗粒结构不稳定性的一些实验
DOI：
10.1007/978-3-642-83064-8_25
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发表时间：
1987
期刊：
影响因子：
--
通讯作者：
S. Iijima
中科院分区：
文献类型：
--
作者：
S. Iijima
通过配备电视监控系统的电子显微镜，可以在原子分辨率水平上对一些尺寸高达 100 A 的金属细颗粒进行检查。当颗粒尺寸减小到 50 A 以下时，发现颗粒形状通过从单晶到孪晶晶体（包括多重孪晶晶体）的内部转变而不断变化，反之亦然。这种转变是在内部和外部原子的协同运动中发生的，在不到一秒的时间内突然发生。小团簇的结构波动似乎与电子束照射引起的电子激发有关。
Fine particles of some metals up to 100 A in size were examined at the level of the atomic resolution by an electron microscope equipped with a TV monitor system. As the size of the particles decreases to below 50 A the particle shapes were found to change continually through the internal transformation from a single crystal to a twinned crystal, including multiply-twinned crystals, and vice versa. The transformation, taking place in a cooperative motion of both internal and external atoms, occurs abruptly in less than a fraction of a second. The structural fluctuation of small clusters seems to be associated with electronic excitations due to irradiation of the electron beam.