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On the mechanism of improvement of field emission properties of carbon-coated field emitters
http://hdl.handle.net/2241/00125309
http://hdl.handle.net/2241/001253090c79269d-cdac-444e-a3ce-885569ec7a77
名前 / ファイル | ライセンス | アクション |
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JVSTB_32-3 (2.3 MB)
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Item type | Journal Article(1) | |||||
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公開日 | 2015-07-23 | |||||
タイトル | ||||||
タイトル | On the mechanism of improvement of field emission properties of carbon-coated field emitters | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源 | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | journal article | |||||
著者 |
Higuchi, Toshiharu
× Higuchi, Toshiharu× Sasaki, Masahiro× Horie, Shota× Yamada, Yoichi× Matsumoto, Shuji× Fukuda, Shigeki |
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著者別名 |
佐々木, 正洋
× 佐々木, 正洋× 山田, 洋一 |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | To clarify the origin of the superior field emission characteristics of carbon-coated emitters, the authors investigated the field enhancement and the work function of model systems calculated by numerical simulations. They propose that the field enhancement is due to the triple junctions, which are distributed on the surface of the carbon film consisting of sp3 (diamond-like) insulating and sp2 (graphite-like) conducting nanometer-sized grains. The electric field around the triple junction is one order of magnitude higher than at other places. Based on ab initio density functional theory calculations, the authors found that (1) the work functions of diamond and graphite dramatically decrease down to 3–3.6 eV upon hydrogen termination, and (2) the effective work functions of these models decrease to 2–2.5 eV by applying an external electric field of 2.57 × 107 V/cm. They also estimated the field emission current from the potential distribution and the local density of states under the external electric field applied. As a result, the authors found that hydrogen termination significantly increases the field emission current. The results suggest that the triple junction and hydrogen termination are promising candidates as the mechanism of improving the emission of the carbon-coated emitters. | |||||
書誌情報 |
Journal of vacuum science & technology B 巻 33, 号 3, p. 03C102, 発行日 2015-05 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 1071-1023 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA10804928 | |||||
DOI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | 10.1116/1.4903229 | |||||
権利 | ||||||
権利情報 | ©2014 American Vacuum Society. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in J. Vac. Sci. Technol. B 33, 03C102 (2015) and may be found at http://dx.doi.org/10.1116/1.4903229. | |||||
著者版フラグ | ||||||
値 | publisher | |||||
出版者 | ||||||
出版者 | American Vacuum Society |