七边形
qī biān xíng
- heptagon;septilateral
七边形
七边形[qī biān xíng]
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结果表明：五边形和七边形在碳管中分布的不同对碳管电学性能的影响明显不同。
These results show that the different arranges of pentagon and heptagon along the axi have obvious difference on electrical properties of carbon Nanotube .
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含有2个五边形七边形缺陷对的单壁碳纳米管的电学性能
Electronic properties of single carbon nanotubes with two pentagon-heptagon pairs defects
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七边形有七条边的多边形。
A polygon having seven sides .
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研究表明，这些五边形和七边形拓扑缺陷不仅改变碳管的直径，支配费米能级附近的电学行为，而且随着拓扑缺陷在碳管中分布和排列方式的不同，碳管电学性能也明显不同。
The result show that these topological defects are not only responsible for a change in nanotube diameter , but also for the electronic behavior in the vicinity to Fermi level .