Dimension, strength, and chemical and thermal stability of a single C-C bond in carbon nanotubes
Dimension, strength, and chemical and thermal stability of a single C-C bond in carbon nanotubes
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DOI：
10.1021/jp035070h
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发表时间：
2003-07
影响因子：
3.3
通讯作者：
Chang Q. Sun;H. Bai;B. Tay;Sean Li;E. Jiang
中科院分区：
文献类型：
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作者：
Chang Q. Sun;H. Bai;B. Tay;Sean Li;E. Jiang
对于单壁碳纳米管，已知杨氏模数Y与壁(键)厚度t(Yt≅0.3685 tpa·nm)和尖端熔化温度(Tm=1593K)的已知乘积，以及它们与原子配位和键能的函数关系，确定了单壁碳纳米管中C-−-C键的尺寸和强度。溶液的唯一性表明，C−C键(或单壁碳纳米管的壁厚)为∼0.142 nm厚，∼0.125 nm长(金刚石键长收缩18.5%，0.154 nm)，结合能相对于块体石墨值增加68%。因此，测量的Yt和Tm值基本上代表了SWCNT的真实情况。
For single-walled carbon nanotubes (SWCNTs), given the known product of the Young's modulus Y and the wall (bond) thickness t (Yt ≅ 0.3685 TPa·nm) and the known temperature of tip-end melting (Tm = 1593 K), as well as their functional dependence on atomic coordination and bonding energy, the dimension and strength of a C−C bond in a SWCNT have been determined. The uniqueness of the solution reveals that the C−C bond (or the wall of the SWCNT) is ∼0.142 nm thick and ∼0.125 nm long (an 18.5% contraction of diamond bond length, 0.154 nm), with a 68% increase in binding energy, with respect to the bulk graphite values. Therefore, the measured Yt and Tm values essentially represent the true SWCNT situation.