AVS 49th International Symposium
    Nanotubes: Science and Applications Topical Conference Tuesday Sessions
       Session NT-TuM

Paper NT-TuM9
Field Emission Properties of Nanostructures Based on Molybdenum Ternary Compounds

Tuesday, November 5, 2002, 11:00 am, Room C-209

Session: Nanotubes: Electronics and Field Emission
Presenter: V. Nemanic, Institute of Surface Engineering and Optoelectronics, Slovenia
Authors: V. Nemanic, Institute of Surface Engineering and Optoelectronics, Slovenia
M. Zumer, Institute of Surface Engineering and Optoelectronics, Slovenia
B. Zajec, Institute of Surface Engineering and Optoelectronics, Slovenia
M. Remskar, Jozef Stefan Institute, Slovenia
A. Mrzel, Jozef Stefan Institute, Slovenia
D. Mihailovic, Jozef Stefan Institute, Slovenia
Correspondent: Click to Email
We have investigated the field emission (FE) properties of quasi one-dimensional molybdenum ternary compounds synthesized by a catalytic transport reaction. The self-assembly of tip-shaped nanofibres leads to the growth of a thin foil composed of mutually oriented bundles, below 500 nm in diameter and up to 20 micrometers in length. All FE measurements were performed in a dynamically pumped UHV system at 10@super -9@ mbar base pressure. The samples were mounted on the top of metal pins positioned some mm from the aluminized luminescent screen biased as the anode. Current - voltage (I-V) measurements were performed under continuous bias conditions up to 4.5 kV where the resulting macroscopic field reached approx. 0.9 V µm@super -1@. The I-V behavior follows predominately the Fowler- Nordheim equation over the measured range. The emission current from a few sites reached a value of some ten micro amps and the emission spots of various shapes were observed. The current initially dropped, but became relatively stable even on the time scale of few hundred hours.