Field emission from AlN nanoneedle arrays

Zhao, Q.; Xu, J.; Xu, X. Y.; Wang, Z.; Yu, D. P.
November 2004
Applied Physics Letters;11/29/2004, Vol. 85 Issue 22, p5331
Academic Journal
AlN nanoneedles with an average tip dimension of ∼15 nm were synthesized via a simple vapor deposition method. The AlN nanoneedles exhibit excellent field-emission properties with a low turn-on field of 3.1 V/μm and a high current density of 4.7 mA/cm2 at the field of 9.9 V/μm. The field enhancement factor for a single nanoneedle is estimated to be as high as 30 000 due to its small tip radius. These features make the AlN nanoneedles a competitive candidate for field-emission-based displays.


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