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try Nanotube Modeler https://www.jcrystal.com/products/wincnt/ Avogadro 1.1 includes a new nanotube builder, based on the well-known TubeGen code and website from the Doren group at U. Delaware. (https://turin.nss.udel.edu/research/tubegenonline.html) |
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3Â¥2024-09-27 17:01:02
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344081554: ½ð±Ò+10, ¡ï¡ï¡ïºÜÓаïÖú, ·Ç³£¸Ðл£¬»¹ÓÐÒÉÎÊδ½â 2024-10-05 18:40:53
344081554: ½ð±Ò+10, ¡ï¡ï¡ïºÜÓаïÖú, ·Ç³£¸Ðл£¬»¹ÓÐÒÉÎÊδ½â 2024-10-05 18:40:53
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From n and m one can also compute the circumference c, which is the length of the vector w, which turns out to be: {\displaystyle c=\left|{\boldsymbol {u}}\right|{\sqrt {(n^{2}+nm+m^{2})}}\approx 246{\sqrt {((n+m)^{2}-nm)}}} in picometres. The diameter {\displaystyle d} of the tube is then {\displaystyle c/\pi }, that is {\displaystyle d\approx 78.3{\sqrt {((n+m)^{2}-nm)}}} also in picometres. (These formulas are only approximate, especially for small n and m where the bonds are strained; and they do not take into account the thickness of the wall.) ³ö×Ôhttps://en.wikipedia.org/wiki/Carbon_nanotube °¥£¬¶¼2024ÄêÁË£¬Ð¡Ä¾³æ»¹²»Äܻظ´Í¼Æ¬ºÍ¹«Ê½ |
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5Â¥2024-10-05 18:42:47













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