用于透射电镜的超薄切片往往需要有支持膜的铜网承载,有支持膜就能有效地吸附切片,并能加强切片承受电子束的轰击,但却有影响分辨率、易污染等弊端。近年来,许多电镜工作者采用无膜铜网承载超薄切片,虽能增强切片反差、提高图 For the ultra-thin section transmission electron microscopy often need to support the membrane copper network bearing a support film can effectively adsorb the slice, and can enhance the slice withstand electron beam bombardment, but have an impact resolution, easy to pollution and other defects. In recent years, many electron microscope workers using film-free copper network to carry ultra-thin slices, although can enhance the slice contrast, improve the map