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Journal of Nanomaterials
Volume 2012, Article ID 369763, 6 pages
Research Article

Core-Shell Structure of a Silicon Nanorod/Carbon Nanotube Field Emission Cathode

1Graduate Institute of Electro-Optical Engineering and Department of Electronic Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan
2Department of Electronic Engineering, Feng Chia University, Taichung 407, Taiwan

Received 30 June 2011; Revised 23 August 2011; Accepted 24 August 2011

Academic Editor: Linbao Luo

Copyright © 2012 Bohr-Ran Huang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A novel core-shell structure of silicon nanorods/carbon nanotubes (SiNRs/CNTs) is developed for use in field emission cathodes. The CNTs were synthesized on SiNRs, using the Ag-assisted electroless etching technique to form the SiNRs/CNT core-shell structure. This resulting SiNRs/CNT field emission cathode demonstrated improved field emission properties including a lower turn-on electric field 𝐸 o n (1.3 V/μm, 1 μA/cm2), a lower threshold electric field 𝐸 t h (1.8 V/μm, 1 mA/cm2), and a higher enhancement factor 𝛽 (2347). These superior properties indicate that this core-shell structure of SiNRs/CNTs has good potential in field emission cathode applications.