Excellent field emission from semialigned carbon nanofibers grown on cylindrical copper surface
- Mahanandia, P.
- Arya, V.
- Bhotla, P. V.
- Subramanyam, S. V.
- Schneider, J. J.
- Nanda, K. K.
DOIAbstract
We report the field emission from carbon nanofibers (CNFs) grown directly on cylindrical copper by a simple pyrolysis technique. The turn-on field is 0.17 V/μm and the emission current density is 0.9 mA/cm<SUP>2</SUP> at 0.35 V/μm. The emission current is stable at a field of 0.35 V/μm and 6.5×10<SUP>−6</SUP> Torr. The excellent field emission behavior is attributed to the sp<SUP>2</SUP> phase in CNFs and the stable emission is due to the direct growth. The direct growth on cylindrical cathode is advantageous for field emission
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