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Proceedings Paper

Automatic resistance measurement of carbon nanotube sheet actuators and the parameters influencing the resistance
Author(s): Sreedevi Lanka; Mohammad H. Haque; Ivica Kolaric; Xin Jiang
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Paper Abstract

Recent advances in technology have led to the development of nanostructured materials based on the assembly of carbon nanotubes with applications ranging from micromechanics to electronics and energy storage. An exciting property of carbon nanotubes is its electro-mechanical actuation behavior. The actuation behavior of the carbon nanotube paper (bucky paper) is greatly influenced by its surface resistance. In this work we propose to find out the resistance of the bucky paper, a porous meshwork of carbon nanotubes, automatically in a controlled and reproducible manner. The resistance is measured by using four wire resistance measurement instruments. It has two pairs of identical poles, positive and negative. Opposite polarity poles are short-circuited leading to two probes out of which one is taken as a reference and the other as varying probes. Considering multi walled carbon nanotube (MWNT) paper of 20 mm diameter, the reference probe is kept fixed at a single point and the varying probe is moved in different directions of the bucky paper plane. When performed manually the obtained results are highly nonlinear having many disturbances. In order to avoid these disturbances, an automatic movable probe holder has been designed and tested which provides a reproducible condition for the measurement automated by LabVIEW® interfacing. A direct measurement of resistance prior and later to the actuation testing is performed. Based on the results, the influence of resistance on actuation performance has been analyzed.

Paper Details

Date Published: 16 May 2005
PDF: 7 pages
Proc. SPIE 5761, Smart Structures and Materials 2005: Active Materials: Behavior and Mechanics, (16 May 2005); doi: 10.1117/12.599768
Show Author Affiliations
Sreedevi Lanka, Fraunhofer Technologie-Entwicklungsgruppe TEG (Germany)
Mohammad H. Haque, Fraunhofer Technologie-Entwicklungsgruppe TEG (Germany)
Ivica Kolaric, Fraunhofer Technologie-Entwicklungsgruppe TEG (Germany)
Xin Jiang, Univ. Siegen (Germany)

Published in SPIE Proceedings Vol. 5761:
Smart Structures and Materials 2005: Active Materials: Behavior and Mechanics
William D. Armstrong, Editor(s)

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