Arc plasma synthesized LaB6 nanocrystallite film on various substrates as a field emitter
作者： Dattatray J. Late , Soumen Karmakar , Mahendra A. More , Sudha V. Bhoraskar , Dilip S. Joag
DOI: 10.1007/S11051-009-9798-4
关键词:
摘要: Lanthanum hexaboride (LaB6) nanocrystallites/nanowires have been successfully synthesized using gas phase condensation in arc plasma. Our results show that the LaB6 nanowires ~20 nm diameter and length of several micrometers. The as-synthesized nanocrystallites are crystalline nature. Field emission studies were carried out on as nano-powder deposited W Re tips foils, also Si foil substrates under ultra high vacuum. Fowler–Nordheim plots obtained from current–voltage characteristics found to be linear accordance with quantum mechanical tunneling phenomenon. High value field enhancement factor (8177) is observed for substrate, indicating electron nanometric features LaB6. plasma nanocrystalline film exhibits good stability emitter without severe deviations initial set a strong ability withstand ion bombardment, which useful low operation voltage vacuum micro/nano electronic devices.
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