“从这些衍射斑点的形状和分布情况看,接下来的谱学测量无法继续进行了。”4月17日上午,中国科学院表面物理国家重点实验室主任郭建东手指电脑显示屏上的图像给记者讲解。“你们这次制备实验材料的前期准备是多长时间?”“一整天吧。要做微观表面的谱学分析,必须在超高真空中原位制备或处理样品表面。鉴定实验材料表面的质量,可以利用低能电子衍射来判断。衍射斑点明锐,表面原子排列 ”From the shape and distribution of these diffraction spots, the following spectroscopic measurements can not be continued.“ On the morning of April 17, Guo Jiandong, director of the State Key Laboratory of Surface Physics, Chinese Academy of Sciences, gave the image on the finger computer screen Reporters explain. ”How long have you been preparing this preparation?“ ”All day long. To do a spectroscopic analysis of a microscopic surface, the surface of the sample must be prepared or processed in-situ in an ultra-high vacuum. The quality of the surface can be judged by the low-energy electron diffraction. The diffraction spots are sharp and sharp, the surface atomic arrangement