Cesium encapsulation in single-walled carbon nanotubes via plasma ion irradiation: Application to junction formation andab initioinvestigation

G. -H. Jeong, A. A. Farajian, R. Hatakeyama, T. Hirata, T. Yaguchi, K. Tohji, H. Mizuseki, Y. Kawazoe
2003 Physical Review B (Condensed Matter)  
Using an approach different from the conventional vapor doping methods, Cs positive ions in a magnetizedplasma column are irradiated upon a negatively biased substrate which is covered with dispersed single-walled carbon nanotubes ͑SWNTs͒. The Cs ions are evidently observed inside SWNTs by the Z-contrast method in scanning transmission electron microscopy, demonstrating the formation of alkali-metal encapsulating SWNTs. Ab initio band structures and density of states for the light and heavy
more » ... light and heavy doping regimes indicate the possibility of using Cs-doped SWNTs as doped junctions, with potential application in nanoelectronics. This is supported by the direct experimental observation of an actual junction.
doi:10.1103/physrevb.68.075410 fatcat:tkjcet6u7jay3avwwpyw7xofyi