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Carbon nanotube-based sensor and method for detection of crack growth in a structure

Author
Kite, Marlen T.
Published
October 9, 2007.
Physical Description
1 electronic document
Additional Creators
Smits, Jan M., Moore, Thomas C., Ingram, JoAnne L., Watkins, Anthony N., Williams, Phillip A., and Wincheski, Russell A.
Online Version

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Unclassified, Unlimited, Publicly available.
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Summary
A sensor has a plurality of carbon nanotube (CNT)-based conductors operatively positioned on a substrate. The conductors are arranged side-by-side, such as in a substantially parallel relationship to one another. At least one pair of spaced-apart electrodes is coupled to opposing ends of the conductors. A portion of each of the conductors spanning between each pair of electrodes comprises a plurality of carbon nanotubes arranged end-to-end and substantially aligned along an axis. Because a direct correlation exists between the resistance of a carbon nanotube and its strain, changes experienced by the portion of the structure to which the sensor is coupled induce a corresponding change in the electrical properties of the conductors, thereby enabling detection of crack growth in the structure.
Other Subject(s)
Collection
NASA Technical Reports Server (NTRS) Collection.
Note
Document ID: 20080009637.
Terms of Use and Reproduction
No Copyright.
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