Characterization of fullerenes and carbon nanoparticles generated with a laser-furnace technique |
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| Authors: | T Ishigaki S Suzuki H Kataura W Krätschmer Y Achiba |
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| Institution: | (1) Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, 106, Taiwan, ROC;(2) Institute of Manufacturing Technology, National Taipei University of Technology, Taipei, 106, Taiwan, ROC;(3) Department of Chemistry, Fu Jen Catholic University, New Taipei City, 242, Taiwan, ROC;(4) School of Dental Technology, Taipei Medical University, Taipei, 11031, Taiwan, ROC; |
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| Abstract: | The microstructure and field emission properties of films prepared from commercial powders of single-wall and multi-wall carbon nanotube films were investigated. In addition to nanotubes, these materials contained amorphous and crystalline carbon phases, and the single-wall powder also contained nano-particles of the Fe-Co catalysts. The turn-on fields were measured to be 2.3 V 7m-1 for films prepared with the material containing single-wall nanotubes and 2.6 V 7m-1 for those with multi-wall nanotubes. Long-term stability of emission current for these films was also investigated and correlated to their microstructure. Single-wall material showed a decrease in emission current that extended over several days and that was related to permanent degradation of emission sites. Emission current from the multi-wall material stabilized after an initial increase. |
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