Synthesis and Enhanced Field-Emission of Thin-Walled, Open-Ended, and Well-Aligned N-Doped Carbon Nanotubes
<p>Abstract</p> <p>Thin-walled, open-ended, and well-aligned N-doped carbon nanotubes (CNTs) on the quartz slides were synthesized by using acetonitrile as carbon sources. As-obtained products possess large thin-walled index (TWI, defined as the ratio of inner diameter and wall thi...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2010-01-01
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| Series: | Nanoscale Research Letters |
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| Online Access: | http://dx.doi.org/10.1007/s11671-010-9586-1 |
| _version_ | 1827850457515556864 |
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| author | Hu Qiang Wang Kunlin Wu Dehai Cui Tongxiang Lv Ruitao Kang Feiyu Gu Jialin |
| author_facet | Hu Qiang Wang Kunlin Wu Dehai Cui Tongxiang Lv Ruitao Kang Feiyu Gu Jialin |
| author_sort | Hu Qiang |
| collection | DOAJ |
| description | <p>Abstract</p> <p>Thin-walled, open-ended, and well-aligned N-doped carbon nanotubes (CNTs) on the quartz slides were synthesized by using acetonitrile as carbon sources. As-obtained products possess large thin-walled index (TWI, defined as the ratio of inner diameter and wall thickness of a CNT). The effect of temperature on the growth of CNTs using acetonitrile as the carbon source was also investigated. It is found that the diameter, the TWI of CNTs increase and the Fe encapsulation in CNTs decreases as the growth temperature rises in the range of 780–860°C. When the growth temperature is kept at 860°C, CNTs with TWI = 6.2 can be obtained. It was found that the filed-emission properties became better as CNT growth temperatures increased from 780 to 860°C. The lowest turn-on and threshold field was 0.27 and 0.49 V/μm, respectively. And the best field-enhancement factors reached 1.09 × 10<sup>5</sup>, which is significantly improved about an order of magnitude compared with previous reports. In this study, about 30 × 50 mm<sup>2</sup> free-standing film of thin-walled open-ended well-aligned N-doped carbon nanotubes was also prepared. The free-standing film can be transferred easily to other substrates, which would promote their applications in different fields.</p> |
| first_indexed | 2024-03-12T10:18:35Z |
| format | Article |
| id | doaj.art-5550d8871727458482bc83c35cf3a583 |
| institution | Directory Open Access Journal |
| issn | 1931-7573 1556-276X |
| language | English |
| last_indexed | 2024-03-12T10:18:35Z |
| publishDate | 2010-01-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Nanoscale Research Letters |
| spelling | doaj.art-5550d8871727458482bc83c35cf3a5832023-09-02T10:18:28ZengSpringerOpenNanoscale Research Letters1931-75731556-276X2010-01-0156941948Synthesis and Enhanced Field-Emission of Thin-Walled, Open-Ended, and Well-Aligned N-Doped Carbon NanotubesHu QiangWang KunlinWu DehaiCui TongxiangLv RuitaoKang FeiyuGu Jialin<p>Abstract</p> <p>Thin-walled, open-ended, and well-aligned N-doped carbon nanotubes (CNTs) on the quartz slides were synthesized by using acetonitrile as carbon sources. As-obtained products possess large thin-walled index (TWI, defined as the ratio of inner diameter and wall thickness of a CNT). The effect of temperature on the growth of CNTs using acetonitrile as the carbon source was also investigated. It is found that the diameter, the TWI of CNTs increase and the Fe encapsulation in CNTs decreases as the growth temperature rises in the range of 780–860°C. When the growth temperature is kept at 860°C, CNTs with TWI = 6.2 can be obtained. It was found that the filed-emission properties became better as CNT growth temperatures increased from 780 to 860°C. The lowest turn-on and threshold field was 0.27 and 0.49 V/μm, respectively. And the best field-enhancement factors reached 1.09 × 10<sup>5</sup>, which is significantly improved about an order of magnitude compared with previous reports. In this study, about 30 × 50 mm<sup>2</sup> free-standing film of thin-walled open-ended well-aligned N-doped carbon nanotubes was also prepared. The free-standing film can be transferred easily to other substrates, which would promote their applications in different fields.</p>http://dx.doi.org/10.1007/s11671-010-9586-1Carbon nanotubesThin-walled open-ended and alignedThin-walled indexBamboo-shaped carbon nanotubesField emissionFree-standing |
| spellingShingle | Hu Qiang Wang Kunlin Wu Dehai Cui Tongxiang Lv Ruitao Kang Feiyu Gu Jialin Synthesis and Enhanced Field-Emission of Thin-Walled, Open-Ended, and Well-Aligned N-Doped Carbon Nanotubes Nanoscale Research Letters Carbon nanotubes Thin-walled open-ended and aligned Thin-walled index Bamboo-shaped carbon nanotubes Field emission Free-standing |
| title | Synthesis and Enhanced Field-Emission of Thin-Walled, Open-Ended, and Well-Aligned N-Doped Carbon Nanotubes |
| title_full | Synthesis and Enhanced Field-Emission of Thin-Walled, Open-Ended, and Well-Aligned N-Doped Carbon Nanotubes |
| title_fullStr | Synthesis and Enhanced Field-Emission of Thin-Walled, Open-Ended, and Well-Aligned N-Doped Carbon Nanotubes |
| title_full_unstemmed | Synthesis and Enhanced Field-Emission of Thin-Walled, Open-Ended, and Well-Aligned N-Doped Carbon Nanotubes |
| title_short | Synthesis and Enhanced Field-Emission of Thin-Walled, Open-Ended, and Well-Aligned N-Doped Carbon Nanotubes |
| title_sort | synthesis and enhanced field emission of thin walled open ended and well aligned n doped carbon nanotubes |
| topic | Carbon nanotubes Thin-walled open-ended and aligned Thin-walled index Bamboo-shaped carbon nanotubes Field emission Free-standing |
| url | http://dx.doi.org/10.1007/s11671-010-9586-1 |
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