期刊
ACS APPLIED NANO MATERIALS
卷 3, 期 8, 页码 7659-7667出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsanm.0c01280
关键词
carbon nanotube; microbundle array; laser ablation; length-to-diameter ratio; field emission
资金
- National Nature Science Foundation of China [U1832176, 11575025]
- Beijing Science and Technology Major Project [Z171100002017008]
The fabrication, properties, and applications of vertically aligned carbon nanotube (VACNT) microbundle arrays with different length-to-diameter ratios were investigated. VACNT microbundle arrays with different length-to-diameter ratios from 4:1 to 30:1 and microscaling of carbon nanotube blocks were fabricated using pulsed laser ablation technology. These VACNT microbundle arrays had a very low threshold field (0.117 V/mu m), excellent time stability, and high field emission current densities (137.91 A/cm(2)). These values are superior to those of carbon nanotubes grown directly on a silicon substrate. The large length-to-diameter ratio and the small diameter of the VACNT microbundles are considered to be the main reasons for the excellent field emission performance.
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