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Paper Abstract and Keywords
Presentation 2012-03-16 11:30
Electrical characteristics of needle-shaped carbon nanotube bundle electrodes
Takahiro Yamakawa, Yuki Hayashida (Osaka Univ.), Sho Harabe (Kumamoto Univ.), Tadashi Kozuno (Osaka Univ.), Nobuki Murayama (Kumamoto Univ.), Hirotsugu Okuno, Tetsuya Yagi (Osaka Univ.) MBE2011-139
Abstract (in Japanese) (See Japanese page) 
(in English) To explore the usability of the neuro-electrodes made of carbon nanotubes (CNT), we have recently developed needle-shaped CNT bundle electrodes with submicron diameters at the tip, and demonstrated that those electrodes are usable as intracellular stimulating electrodes in acutely dissociated neurons by means of electrophysiological experiments in vitro. In the present report, we tested if such a CNT bundle electrode can be fabricated as having enough mechanical strength for penetrating a neural tissue and electrical properties suitable for extracellular electrodes. The experiments have shown that the needle-shaped CNT bundles having the tip diameters of around one micron can be inserted into the slice preparation of mouse cortex without a significant deformation, and that the electrical impedance of those electrodes measured in physiological saline was around one mega-ohm at one kilo-hertz.
Keyword (in Japanese) (See Japanese page) 
(in English) Neural prosthesis / Neuro-electrode / Carbon nanotube bundle / Physiological experiment / / / /  
Reference Info. IEICE Tech. Rep., vol. 111, no. 482, MBE2011-139, pp. 171-174, March 2012.
Paper # MBE2011-139 
Date of Issue 2012-03-07 (MBE) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
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 MBE NC  
Conference Date 2012-03-14 - 2012-03-16 
Place (in Japanese) (See Japanese page) 
Place (in English) Tamagawa University 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To MBE 
Conference Code 2012-03-MBE-NC 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Electrical characteristics of needle-shaped carbon nanotube bundle electrodes 
Sub Title (in English)  
Keyword(1) Neural prosthesis  
Keyword(2) Neuro-electrode  
Keyword(3) Carbon nanotube bundle  
Keyword(4) Physiological experiment  
1st Author's Name Takahiro Yamakawa  
1st Author's Affiliation Osaka University (Osaka Univ.)
2nd Author's Name Yuki Hayashida  
2nd Author's Affiliation Osaka University (Osaka Univ.)
3rd Author's Name Sho Harabe  
3rd Author's Affiliation Kumamoto University (Kumamoto Univ.)
4th Author's Name Tadashi Kozuno  
4th Author's Affiliation Osaka University (Osaka Univ.)
5th Author's Name Nobuki Murayama  
5th Author's Affiliation Kumamoto University (Kumamoto Univ.)
6th Author's Name Hirotsugu Okuno  
6th Author's Affiliation Osaka University (Osaka Univ.)
7th Author's Name Tetsuya Yagi  
7th Author's Affiliation Osaka University (Osaka Univ.)
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Speaker Author-1 
Date Time 2012-03-16 11:30:00 
Presentation Time 25 minutes 
Registration for MBE 
Paper # MBE2011-139 
Volume (vol) vol.111 
Number (no) no.482 
Page pp.171-174 
Date of Issue 2012-03-07 (MBE) 

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