Single-crystalline polytetrafluoroethylene-like nanotubes prepared from atmospheric plasma discharge

Zhang, J.; Guo, Y.; Xu, J. Z.; Fang, X. S.; Xie, H. K.; Shi, D. L.; He, P.; van Ooij, W. J.
March 2005
Applied Physics Letters;3/28/2005, Vol. 86 Issue 13, p131501
Academic Journal
Atmospheric plasma polymerization of perfluorohexane was investigated in this letter. A large quantity of single-crystalline polytetrafluoroethylene (PTFE)-like nanotubes were formed on a simultaneously deposited film at room temperature without any catalysts or templates. The outer diameter of the nanotubes varied from 60 to 1200 nm with a maximum aspect ratio up to 100:1. Transmission electron microscopy and x-ray diffraction results indicated a single crystal close-packed hexagonal (cph) structure in the nanotubes. Polarization optical micrographs of the nanotubes showed their thermal stability comparable to PTFE. It is suggested that the plasma filament played a key role in the rapid formation of the nanotubes. This atmospheric plasma discharge synthesis can serve as a common method for nanofabrication of many other single-crystalline polymer systems.


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