January 22, 2013
Journal Article

Very Stable Electron Field Emission From Strontium Titanate Coated
Carbon Nanotube Matrices With Low Emission Thresholds

Abstract

PMMA-STO-CNT matrices were created by opened-tip vertically-aligned multiwalled carbon nanotubes (VA-MWCNTs) with conformal coating of strontium titanate and Poly(methyl methacrylate). Emission threshold of 0.8 V/µm was demonstrated, about five-fold lower than that of the as-grown VAMWCNTs. Theoretical simulation and modeling suggest that PMMA-STO-CNT matrices have suppressed screening effects and Coulombs’ repulsion forces between electrons in adjacent CNTs, leading to low emission threshold, high emission density, and prolong emission stability. These findings are important for practical application of VA-MWCNTs in field emission devices.

Revised: August 12, 2014 | Published: January 22, 2013

Citation

Pandey A., A. Prasad, J. Moscatello, M.H. Engelhard, C.M. Wang, and Y.K. Yap. 2013. "Very Stable Electron Field Emission From Strontium Titanate Coated Carbon Nanotube Matrices With Low Emission Thresholds." ACS Nano 7, no. 1:117-125. PNNL-SA-70619. doi:10.1021/nn303351g