1. Initial growth of vertically aligned carbon nanofibers
- Author
-
Michael L. Simpson, Douglas H. Lowndes, Maria Varela, Xiaojing Yang, and H. Cui
- Subjects
Materials science ,Physics and Astronomy (miscellaneous) ,Scanning electron microscope ,Carbon nanofiber ,Nanotechnology ,Substrate (electronics) ,Carbon nanotube ,law.invention ,Transverse plane ,law ,Transmission electron microscopy ,Particle ,Graphite ,Composite material - Abstract
Samples of vertically aligned carbon nanofibers (VACNFs) were viewed transverse to the growth direction and studied using both scanning and transmission electron microscopy. The VACNFs are composed of graphite layers nearly parallel to the substrate at their bottom end, gradually formed graphite “cups” in the main body, and a catalyst particle on the tip. The formation of such structure is due to the corresponding transformation of the shape of the catalyst particle during initial VACNF growth. A model for their initial growth is proposed.
- Published
- 2004