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扫描透射电子显微镜
时间：2022-03-04 10:34
关键词：
细胞基本知识
大学试题
理学
答案解析
<p> 既有透射电子显微镜又有扫描电子显微镜的显微镜。象SEM一样，STEM用电子束在样品的表面扫描，但又象TEM，通过电子穿透样品成像。STEM能够获得TEM所不能获得的一些关于样品的特殊信息。STEM技术要求较高，要非常高的真空度，并且电子学系统比TEM和SEM都要复杂。</p>
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