Microplasma illumination enhancement of vertically aligned conducting ultrananocrystalline diamond nanorods
1 Department of Materials Science and Engineering, National Tsing-Hua University, Hsinchu, Taiwan 300, Republic of China
2 Department of Engineering and System Science, National Tsing-Hua University, Hsinchu, Taiwan 300, Republic of China
3 Department of Photonics Engineering, Yuan Ze University, Chung-Li, Taiwan 32003, Republic of China
4 Department of Physics, Tamkang University, Tamsui, Taiwan 251, Republic of China
Nanoscale Research Letters 2012, 7:522 doi:10.1186/1556-276X-7-522Published: 25 September 2012
Vertically aligned conducting ultrananocrystalline diamond (UNCD) nanorods are fabricated using the reactive ion etching method incorporated with nanodiamond particles as mask. High electrical conductivity of 275 Ω·cm−1 is obtained for UNCD nanorods. The microplasma cavities using UNCD nanorods as cathode show enhanced plasma illumination characteristics of low threshold field of 0.21 V/μm with plasma current density of 7.06 mA/cm2 at an applied field of 0.35 V/μm. Such superior electrical properties of UNCD nanorods with high aspect ratio potentially make a significant impact on the diamond-based microplasma display technology.