Field emission properties of nano-structured cobalt ferrite (CoFe2O4) synthesized by low-temperature chemical method
Abstract
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/μm) and high emission current-density (775 μA/cm2) at a lower applied electric field of 6.80 V/μm. In addition, extremely good emission current stability is obtained at a pre-set value of 1 μA and high emission spot-density over large area (2 × 2 cm2) suggesting the applicability of these materials for practical applications in vacuum micro-/nano-electronics.
- Publication:
-
Chemical Physics Letters
- Pub Date:
- June 2018
- DOI:
- 10.1016/j.cplett.2018.04.027
- Bibcode:
- 2018CPL...701..151A
- Keywords:
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- Cobalt ferrite;
- Chemical synthesis;
- Field emission