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[求助]
透摄电镜图
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Figure 1 shows TEM pictures of a sample with an initial cyanamide/silica mass ratio of 1:1 that was condensed for 4 h at 550 8C and freed of the template. The TEM pictures indicate that the pore size and connectivity of those powders exactly reflect the geometric properties of the original template. The disordered pore system of spherical pores with a mean diameter of 12 nm can be regarded as a direct image,or more appropriately,a negative image of the structure of the silica sol. In addition,electron diffraction of a selected area proves the high partial crystallinity of the pore walls,which is revealed by one intense diffraction ring corresponding to the stacking distance of g-C3N4 (d=0.33 nm). 是什意思,看不懂。请各位高手帮忙看一下 |
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