Hydrogen adsorption and cohesive energy of single-walled carbon nanotubes
Hydrogen adsorption and cohesive energy of single-walled carbon nanotubes
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DOI：
10.1063/1.123833
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发表时间：
1999-04
影响因子：
4
通讯作者：
Y. Ye;C. Ahn;C. Witham;B. Fultz;Jie Liu;A. Rinzler;D. Colbert;Kenneth A. Smith;R. Smalley
中科院分区：
文献类型：
--
作者：
Y. Ye;C. Ahn;C. Witham;B. Fultz;Jie Liu;A. Rinzler;D. Colbert;Kenneth A. Smith;R. Smalley
氢吸附在碳单壁纳米管（SWNT）的结晶绳被发现超过8重量%，这是所有碳材料中容量最高的。氢首先被吸附在晶体绳的外表面上。然而，在80 K下高于约40巴的压力下，发生相变，其中存在单个SWNT的分离，并且氢被物理吸附在它们的暴露表面上。这种相变的压力为大部分材料提供了5 meV/C原子的管-管结合能。这个小的内聚能受到绳中晶体有序质量的强烈影响。
Hydrogen adsorption on crystalline ropes of carbon single-walled nanotubes (SWNT) was found to exceed 8 wt.%, which is the highest capacity of any carbon material. Hydrogen is first adsorbed on the outer surfaces of the crystalline ropes. At pressures higher than about 40 bar at 80 K, however, a phase transition occurs where there is a separation of the individual SWNTs, and hydrogen is physisorbed on their exposed surfaces. The pressure of this phase transition provides a tube-tube cohesive energy for much of the material of 5 meV/C atom. This small cohesive energy is affected strongly by the quality of crystalline order in the ropes.