Journal
ACS NANO
Volume 8, Issue 8, Pages 7763-7770Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nn500921s
Keywords
field emission; metal decoration; screening effect; work function; edge effect
Categories
Funding
- U.S. Department of Defense: U.S. Air Force Office of Scientific Research [FA9550-12-1-0035]
- Indian Institute of Science, Bangalore
- CONACYT [213780]
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A simple and scalable method of decorating 3D-carbon nanotube (CNT) forest with metal particles has been developed. The results observed in aluminum (AI) decorated CNTs and copper (Cu) decorated CNTs on silicon (Si) and Inconel are compared with undecorated samples. A significant improvement in the field emission characteristics of the cold cathode was observed with ultralow turn on voltage (E-to similar to 0.1 V/mu m) due to decoration of CNTs with metal nanoparticles. Contact resistance between the CNTs and the substrate has also been reduced to a large extent, allowing us to get stable emission for longer duration without any current degradation, thereby providing a possibility of their use in vacuum microelectronic devices.
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