Encapsulation and polymerization of acetylene molecules inside a carbon nanotube

Details Encapsulation and polymerization of acetylene molecules inside a carbon nanotube Encapsulation and polymerization of acetylene molecules inside a carbon nanotube

2005-06-28

arxiv.org/abs/cond-mat/0506748v3

Chemical Physics Letters v. 415, p.279 (2005)

Physics

Condensed Matter

Other Condensed Matter

4 pages, 2 figures

Scientific paper

10.1016/j.cplett.2005.08.153

We study the energetics of acetylene (${\rm C_2H_2}$) molecules inside a carbon nanotube (CNT) using the {\it ab initio} pseudopotential method. The encapsulation energy of a single ${\rm C_2H_2}$ molecule into the nanotube and the formation energy of ${\rm (C_2H_2)}_n$@CNT are calculated. We investigate whether a polyacetylene chain can be produced by fusion of the close-packed acetylene molecules inside the CNT and find that there is practically no activation barrier to polymerization. We propose to employ this method to obtain straight, perfectly isolated, and single-stranded polyacetylene chains encapsulated inside CNTs, which may be used for molecular electronic devices.

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