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Paper Abstract and Keywords
Presentation 2014-10-21 13:30
On the mechanism of enhancement on field emission properties for carbon coated field emitters (Part-3)
Toshiharu Higuchi, Masahiro Sasaki, Shota Horie, Yoichi Yamada (Tsukuba Univ.), Shuji Matsumoto, Shigeki Fukuda (KEK) ED2014-62
Abstract (in Japanese) (See Japanese page) 
(in English) To clarify the origin of the superior field emission characteristics of carbon-coated emitters, we have been investigating the emission mechanism by the numerical simulations. From the work function and emission current analyses based on the ab initio DFT calculation , we found that: (1) the work functions of diamond and graphite dramatically decrease to 2.3 - 3.6 eV upon hydrogen termination, and the effective work functions of the H-terminated models decrease to 1.8 – 2.5 eV by applying an external electric field of 2.57 E7 V/cm, (2) hydrogen termination significantly increases emission current: by fifteen orders of magnitude for diamond (001)-(1x1), by six for diamond (001)-(2x1), and by six for graphite. From these investigations, we conclude that the hydrogen terminated models are promising candidates as the mechanism of improving the field emission feature upon coating with the arc-prepared carbon film.
Keyword (in Japanese) (See Japanese page) 
(in English) Field Emission / Work Function / ab initio simulation / First Principle Calculation / Carbon Film / / /  
Reference Info. IEICE Tech. Rep., vol. 114, no. 262, ED2014-62, pp. 1-6, Oct. 2014.
Paper # ED2014-62 
Date of Issue 2014-10-14 (ED) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
and
reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
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Conference Information
Committee ED  
Conference Date 2014-10-21 - 2014-10-22 
Place (in Japanese) (See Japanese page) 
Place (in English) Hokkaido Univ. (Faculty House Trillium) 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Electron Tube, Vacuum Nanoelectronics, and Their Characterization Techniques 
Paper Information
Registration To ED 
Conference Code 2014-10-ED 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) On the mechanism of enhancement on field emission properties for carbon coated field emitters (Part-3) 
Sub Title (in English)  
Keyword(1) Field Emission  
Keyword(2) Work Function  
Keyword(3) ab initio simulation  
Keyword(4) First Principle Calculation  
Keyword(5) Carbon Film  
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1st Author's Name Toshiharu Higuchi  
1st Author's Affiliation University of Tsukuba (Tsukuba Univ.)
2nd Author's Name Masahiro Sasaki  
2nd Author's Affiliation University of Tsukuba (Tsukuba Univ.)
3rd Author's Name Shota Horie  
3rd Author's Affiliation University of Tsukuba (Tsukuba Univ.)
4th Author's Name Yoichi Yamada  
4th Author's Affiliation University of Tsukuba (Tsukuba Univ.)
5th Author's Name Shuji Matsumoto  
5th Author's Affiliation High Energy Accelerator Research Organization (KEK)
6th Author's Name Shigeki Fukuda  
6th Author's Affiliation High Energy Accelerator Research Organization (KEK)
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Speaker Author-1 
Date Time 2014-10-21 13:30:00 
Presentation Time 25 minutes 
Registration for ED 
Paper # ED2014-62 
Volume (vol) vol.114 
Number (no) no.262 
Page pp.1-6 
#Pages 6 
Date of Issue 2014-10-14 (ED) 

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