Journal
CHEMICAL PHYSICS LETTERS
Volume 701, Issue -, Pages 151-156Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cplett.2018.04.027
Keywords
Cobalt ferrite; Chemical synthesis; Field emission
Funding
- BARC, Mumbai [GOI-E-175]
- National Science Foundation (NSF) [DMR-1205302]
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We report on the field-emission properties of structure-morphology controlled nano-CoFe2O4 (CFO) synthesized via a simple and low-temperature chemical method. Structural analyses indicate that the spongy-CFO (approximately, 2.96 nm) is nano-structured, spherical, uniformly-distributed, cubic-structured and porous. Field emission studies reveal that CFO exhibit low turn-on field (4.27 V/mu m) and high emission current-density (775 mu A/cm(2)) at a lower applied electric field of 6.80 V/mu m. In addition, extremely good emission current stability is obtained at a pre-set value of 1 mu A and high emission spot-density over large area (2 x 2 cm(2)) suggesting the applicability of these materials for practical applications in vacuum micro-/nano-electronics. (C) 2018 Elsevier B.V. All rights reserved.
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