Publications OK SMART LAB

Synthesis and field emission characteristics of carbon nanocoils with a high aspect ratio supported by copper micro-tips
Authors
Woo Yong Sung, Jong G. Ok, Wal Jun Kim, Seung Min Lee, Soon Chang Yeon, Ho Young Lee, and Yong Hyup Kim
Journal
Nanotechnology
Vol
18 (24), 245603 (Jun 2007)
Year
Prior to 2014
Carbon nanocoils (CNCs) were synthesized via thermal chemical vapour deposition (CVD) with C2H2 and NH3 gases at 600 °C. A Ni catalyst was placed upon the copper micro-tip structures that were fabricated on a silicon substrate. Our CNCs had a long rope shape with a length not exceeding 100 µm and a nanoscale diameter. The copper micro-tips were formed through high current pulse electroplating, which played a significant role in characterizing our CNCs. The CNCs grown on the copper micro-tips showed outstanding field emission performance and long-term stability. Their turn-on field, defined as that at a current density of 10 µA cm−2, was 1.30 V µm−1 and the maximum current density reached 11.17 mA cm−2 at an electric field of 2.39 V µm−1.