当电子波(具有一定能量的电子)落到晶体上时,被晶体中原子散射,各散射电子波之间产生互相干涉现象。晶体中每个原子均对电子进行散射,使电子改变其方向和波长。在散射过程中部分电子与原子有能量交换作用,电子的波长发生变化,此时称非弹性散射;若无能量交换作用,电子的波长不变,则称弹性散射。在弹性散射过程中,由于晶体中原子排列的周期性,各原子所散射的电子波在叠加时互相干涉,散射波的总强度在空间的分布并不连续,除在某一定方向外,散射波的总强度为零。
晶体材料中的长程有序 可以用X射线(x-ray diffraction)或电子衍射(electron diffraction)技术 来研究。 液晶(liquid crystals-LCs)是一种有着特定排列的高分子材料。
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...纳米管一般 由几个到几十个同心轴结构的层面构成,层面间距约为0.34m,这与石墨层面的[0021 面间距相当,选区电子衍射(SEAD)也证实这些碳纳米管具有类似石墨[002]面衍射花 样,因此可以认为碳纳米管是由石墨层面卷曲而成的无缝中空管。
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... diffraction modulation transfer function 衍射调制备递函数 diffraction of electon 电子衍射 diffraction pattern 衍射图 ...
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选区电子衍射 SAED ; Selected Area Electron Diffraction ; SADP
低能电子衍射 LEED ; Low-energy electron diffraction ; low-energy electron diffraction,LEED ; low energy electron diffraction
高能电子衍射 RHEED ; high energy electron diffraction ; reflection high energy electron diffraction
电子衍射法 method of electron diffraction ; electron diffraction method ; Electron Diffraction
电子衍射照相机 cathodograph ; [光] [摄] electron diffraction camera ; camera for electron diffraction
电子衍射图 electronogram ; electron diffraction pattern ; SAED ; reduced quadrangle
电子衍射象 electron diffraction image
电子衍射照像机 electron diffraction camera
反射高能电子衍射 RHEED ; Reflection high-energy electron diffraction
XRD and HRTEM found that the structure of mesoporous zirconia remained under 600 oC, but was damaged at higher temperature. Selected-area electron diffraction showed that some ZrO2 nanocrystallites were embedded in the mesoscopically ordered semicrystalline wall.
介孔氧化锆经不同温度焙烧后的XRD和HRTEM结果表明,600℃焙烧后仍能保持介孔结构,更高温度焙烧介孔结构被破坏;选区电子衍射显示在介孔孔壁上有部分的纳米晶生成。
参考来源 - 介孔氧化锆材料的模板自组装法合成与表征·2,447,543篇论文数据,部分数据来源于NoteExpress
电子衍射结果表明薄膜是非晶态的。
Electron diffraction results show that these films are amorphous.
本文介绍了两种电子衍射花样的微型机分析程序。
This paper describes two microcomputer programs of electron diffraction spot patterns.
电子衍射花样证明,界面层比较干净,没有发现其他反应产物。
The electronic diffraction pattern shows that these interfaces are clean without any other reaction products.
They did this in Bell Laboratories, and they found that, in fact, the electrons did diffract.
他们在贝尔实验室完成了这项工作,他们发现实际上,电子确实发生了衍射。
And at first this was done by Davidson and Germer, and they were American scientists who tried diffracting electrons from a nickel crystal.
这个实验首先是由,美国科学家Davidson和Germer完成的,他们尝试从镍晶体中衍射电子。
Electron diffraction was born. Electron.
电子衍射产生了。
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