Enhanced field emission properties of carbon nanotube bundles confined in SiO2 pits
It has been widely reported that carbon nanotubes (CNTs) exhibit superior field emission (FE) properties due to their high aspect ratios and unique structural properties. Among the various types of CNTs, random growth CNTs exhibit promising FE properties due to their reduced inter-tube screening eff...
| Main Authors: | , , , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2020
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/139752 |
| _version_ | 1826125278849531904 |
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| author | Lim, Yu Dian Grapov, Dmitry Hu, Liangxing Kong, Qinyu Tay, Beng Kang Labunov, Vladimir Miao, Jianmin Coquet, Philippe Aditya, Sheel |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Lim, Yu Dian Grapov, Dmitry Hu, Liangxing Kong, Qinyu Tay, Beng Kang Labunov, Vladimir Miao, Jianmin Coquet, Philippe Aditya, Sheel |
| author_sort | Lim, Yu Dian |
| collection | NTU |
| description | It has been widely reported that carbon nanotubes (CNTs) exhibit superior field emission (FE) properties due to their high aspect ratios and unique structural properties. Among the various types of CNTs, random growth CNTs exhibit promising FE properties due to their reduced inter-tube screening effect. However, growing random growth CNTs on individual catalyst islands often results in spread out CNT bundles, which reduces overall field enhancement. In this study, significant improvement in FE properties in CNT bundles is demonstrated by confining them in microfabricated SiO2 pits. Growing CNT bundles in narrow (0.5 μm diameter and 2 μm height) SiO2 pits achieves FE current density of 1-1.4 A cm-2, which is much higher than for freestanding CNT bundles (76.9 mA cm-2). From the Fowler Nordheim plots, confined CNT bundles show a higher field enhancement factor. This improvement can be attributed to the reduced bundle diameter by SiO2 pit confinement, which yields bundles with higher aspect ratios. Combining the obtained outcomes, it can be conclusively summarized that confining CNTs in SiO2 pits yields higher FE current density due to the higher field enhancement of confined CNTs. |
| first_indexed | 2024-10-01T06:34:02Z |
| format | Journal Article |
| id | ntu-10356/139752 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:34:02Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1397522020-05-21T06:35:00Z Enhanced field emission properties of carbon nanotube bundles confined in SiO2 pits Lim, Yu Dian Grapov, Dmitry Hu, Liangxing Kong, Qinyu Tay, Beng Kang Labunov, Vladimir Miao, Jianmin Coquet, Philippe Aditya, Sheel School of Electrical and Electronic Engineering School of Mechanical and Aerospace Engineering Centre for Micro-/Nano-electronics (NOVITAS) CNRS-International-NTU-Thales Research Alliance Engineering::Electrical and electronic engineering Field Emission Carbon Nanotubes It has been widely reported that carbon nanotubes (CNTs) exhibit superior field emission (FE) properties due to their high aspect ratios and unique structural properties. Among the various types of CNTs, random growth CNTs exhibit promising FE properties due to their reduced inter-tube screening effect. However, growing random growth CNTs on individual catalyst islands often results in spread out CNT bundles, which reduces overall field enhancement. In this study, significant improvement in FE properties in CNT bundles is demonstrated by confining them in microfabricated SiO2 pits. Growing CNT bundles in narrow (0.5 μm diameter and 2 μm height) SiO2 pits achieves FE current density of 1-1.4 A cm-2, which is much higher than for freestanding CNT bundles (76.9 mA cm-2). From the Fowler Nordheim plots, confined CNT bundles show a higher field enhancement factor. This improvement can be attributed to the reduced bundle diameter by SiO2 pit confinement, which yields bundles with higher aspect ratios. Combining the obtained outcomes, it can be conclusively summarized that confining CNTs in SiO2 pits yields higher FE current density due to the higher field enhancement of confined CNTs. 2020-05-21T06:35:00Z 2020-05-21T06:35:00Z 2018 Journal Article Lim, Y. D., Grapov, D., Hu, L., Kong, Q., Tay, B. K., Labunov, V., . . . Aditya, S. (2018). Enhanced field emission properties of carbon nanotube bundles confined in SiO2 pits. Nanotechnology, 29(7), 075205-. doi:10.1088/1361-6528/aaa1bb 0957-4484 https://hdl.handle.net/10356/139752 10.1088/1361-6528/aaa1bb 29239308 2-s2.0-85040699840 7 29 en Nanotechnology © 2018 IOP Publishing Ltd. All rights reserved. This is an author-created, un-copyedited version of an article accepted for publication in Nanotechnology. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The definitive publisher authenticated version is available online at https://doi.org/10.1088/1361-6528/aaa1bb |
| spellingShingle | Engineering::Electrical and electronic engineering Field Emission Carbon Nanotubes Lim, Yu Dian Grapov, Dmitry Hu, Liangxing Kong, Qinyu Tay, Beng Kang Labunov, Vladimir Miao, Jianmin Coquet, Philippe Aditya, Sheel Enhanced field emission properties of carbon nanotube bundles confined in SiO2 pits |
| title | Enhanced field emission properties of carbon nanotube bundles confined in SiO2 pits |
| title_full | Enhanced field emission properties of carbon nanotube bundles confined in SiO2 pits |
| title_fullStr | Enhanced field emission properties of carbon nanotube bundles confined in SiO2 pits |
| title_full_unstemmed | Enhanced field emission properties of carbon nanotube bundles confined in SiO2 pits |
| title_short | Enhanced field emission properties of carbon nanotube bundles confined in SiO2 pits |
| title_sort | enhanced field emission properties of carbon nanotube bundles confined in sio2 pits |
| topic | Engineering::Electrical and electronic engineering Field Emission Carbon Nanotubes |
| url | https://hdl.handle.net/10356/139752 |
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