Field Electron Emission from Caterpillar-Like Clavae Nano-Structure Carbon Thin Films
Nano-carbon films with large density of caterpillar-like clavae are synthesized by microwave plasma-assisted chemical vapor deposition using a mixture of methane and hydrogen gases on Mo film substrates. The films are characterized by Raman spectra, optical microscopy and field emission scanning ele...
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| Published in | Chinese physics letters Vol. 27; no. 8; pp. 222 - 224 |
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| Main Author | |
| Format | Journal Article |
| Language | English |
| Published |
IOP Publishing
01.08.2010
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| Subjects | |
| Online Access | Get full text |
| ISSN | 0256-307X 1741-3540 |
| DOI | 10.1088/0256-307X/27/8/087901 |
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| Abstract | Nano-carbon films with large density of caterpillar-like clavae are synthesized by microwave plasma-assisted chemical vapor deposition using a mixture of methane and hydrogen gases on Mo film substrates. The films are characterized by Raman spectra, optical microscopy and field emission scanning electron microscopy. Field electron emission measurements of nano-carbon films are also carried out to show the turn-on field as low as 1.5 V/μm and the high current density of 2.2mA/cm^2 at electric field of 5.TV/μm, the uniformly distributed emission site density from a broad well-proportioned emission area of about 4.0cm^2 is also obtained. The field- emission current density J versus macroscopic electric field E does not follow the original Fowler-Nordheim （F-N） relation since they are not well represented in the F-N plot by a straight line. A modified F-N relation is applied successfully to explain all the field-emission data observed for E 〈 6.0 V/μm. |
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| AbstractList | Nano-carbon films with large density of caterpillar-like clavae are synthesized by microwave plasma-assisted chemical vapor deposition using a mixture of methane and hydrogen gases on Mo film substrates. The films are characterized by Raman spectra, optical microscopy and field emission scanning electron microscopy. Field electron emission measurements of nano-carbon films are also carried out to show the turn-on field as low as 1.5 V/μm and the high current density of 2.2mA/cm^2 at electric field of 5.TV/μm, the uniformly distributed emission site density from a broad well-proportioned emission area of about 4.0cm^2 is also obtained. The field- emission current density J versus macroscopic electric field E does not follow the original Fowler-Nordheim （F-N） relation since they are not well represented in the F-N plot by a straight line. A modified F-N relation is applied successfully to explain all the field-emission data observed for E 〈 6.0 V/μm. Nano-carbon films with large density of caterpillar-like clavae are synthesized by microwave plasma-assisted chemical vapor deposition using a mixture of methane and hydrogen gases on Mo film substrates. The films are characterized by Raman spectra, optical microscopy and field emission scanning electron microscopy. Field electron emission measurements of nano-carbon films are also carried out to show the turn-on field as low as 1.5 V/ Delta *mm and the high current density of 2.2 mA/cm2 at electric field of 5.7 V/ Delta *mm, the uniformly distributed emission site density from a broad well-proportioned emission area of about 4.0 cm2 is also obtained. The field-emission current density J versus macroscopic electric field E does not follow the original Fowler--Nordheim (F-N) relation since they are not well represented in the F-N plot by a straight line. A modified F-N relation is applied successfully to explain all the field-emission data observed for E < 6.0 V/ Delta *mm. |
| Author | 王丽军 朱玉传 王小平 章诗 刘欣欣 李怀辉 梅翠玉 刘晓菲 |
| AuthorAffiliation | College of Science, University of Shanghai for Science and Technology, Shanghai 200093 |
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| CitedBy_id | crossref_primary_10_1016_j_carbon_2013_02_045 crossref_primary_10_1016_j_apsusc_2014_04_126 |
| Cites_doi | 10.1016/j.diamond.2005.10.035 10.1088/0022-3727/26/10/035 10.1016/j.diamond.2009.10.014 10.1088/0256-307X/15/8/024 10.1088/0256-307X/26/8/086112 10.1063/1.117123 10.1016/j.diamond.2006.09.016 10.1063/1.1314874 10.1088/0957-4484/15/10/029 10.1088/0256-307X/24/1/063 10.1126/science.282.5393.1471 10.1016/j.diamond.2004.06.030 10.1063/1.3298648 10.1063/1.119041 10.1063/1.3115767 10.1088/0256-307X/25/11/086 10.2533/000942902777680081 10.1016/j.carbon.2009.08.009 10.1088/0022-3727/30/16/003 10.1063/1.3205475 10.1103/PhysRevB.61.14095 10.1103/PhysRevB.29.3482 10.1016/j.diamond.2006.11.046 10.1109/55.119164 10.1088/0256-307X/23/5/069 10.1063/1.1620681 |
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| SubjectTerms | Current density Density Electric fields Electron emission Emission Nanocomposites Nanomaterials Nanostructure Thin films 光学显微镜 卡特彼勒 场发射扫描电子显微镜 场致电子发射 电流密度 碳薄膜 等离子体辅助 纳米结构 |
| Title | Field Electron Emission from Caterpillar-Like Clavae Nano-Structure Carbon Thin Films |
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