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Title: Enhanced Field Emission properties of Carbon Nanotube films using densification technique
Authors: Lim, Yu Dian
Kong, Qinyu
Wang, Shaomeng
Tan, Chong Wei
Tay, Beng Kang
Aditya, Sheel
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2019
Source: Lim, Y. D., Kong, Q., Wang, S., Tan, C. W., Tay, B. K. & Aditya, S. (2019). Enhanced Field Emission properties of Carbon Nanotube films using densification technique. Applied Surface Science, 477, 211-219.
Project: S14-1126-NRF OSTIn-SRP
Journal: Applied Surface Science
Abstract: It has been reported that Carbon Nanotubes (CNTs) films show much lower Field Emission (FE) current density than single CNT, due to the screening effect between CNTs. To minimize the screening effect, a widely-reported technique is to grow CNTs in isolated islands to form CNT arrays, which requires precise photolithography technique and CNT growth control. In this study, we demonstrate a simpler alternative to reduce the screening effect in CNT films using ethanol-densification. To perform densification, ethanol is dripped onto CNT films and dried in ambient condition to form CNT clusters. Densified CNT films show 2–4 times improvement in FE current density. This improvement in current density can be attributed to the enhanced localized electric field on CNT tips, as suggested by the simulation results. From the repeated densification and FE measurements, it is found that densified CNT films achieved consistent current density of 9 ∼ 11 mA/cm2. At the same time, densified CNT film exhibits good FE current stability over prolonged continuous emission, with slight degradation from ∼10 to ∼9.64 mA/cm2 over 4000 s continuous emission.
ISSN: 0169-4332
DOI: 10.1016/j.apsusc.2017.11.005
Rights: © 2017 Elsevier B.V. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:EEE Journal Articles

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