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Open AccessFeature PaperArticle

High-Bandwidth and Sensitive Air Flow Sensing Based on Resonance Properties of CNT-on-Fiber Hairs

1
Air Force Research Laboratory, Materials and Manufacturing Directorate, Universal Technology Corporation, Wright-Patterson Air Force Base, Dayton, OH 45433, USA
2
Air Force Research Laboratory, Munitions Directorate, Eglin Air Force Base, Valparaiso, FL 32542, USA
3
Air Force Research Laboratory, Materials and Manufacturing Directorate, Wright-Patterson Air Force Base, Dayton, OH 45433, USA
*
Author to whom correspondence should be addressed.
Academic Editor: Jandro L. Abot
Received: 21 December 2016 / Revised: 21 February 2017 / Accepted: 27 February 2017 / Published: 8 March 2017
(This article belongs to the Special Issue Carbon-Based Sensors)
Artificial hair flow sensors were fabricated using piezoresistive, radially grown carbon nanotube arrays on glass fibers and investigated for their dynamic aerodynamic response as measured within an instrumented plane-wave tube. The sensors were experimentally observed to provide both a large bandwidth of operation below first resonance and a strong resonance response at selected frequencies above first resonance. The frequency of first resonance was easily tunable by adjusting the length of the exposed hair and could be made to vary from a few hundred hertz to over 13 kHz. Higher frequency bands were accessible for a given hair length using higher-order resonance modes, up to five of which were observed. All of the responses were understood and modeled using a vibrating Euler-Bernoulli beam analysis. View Full-Text
Keywords: CNT; hair flow sensor; vibration resonance frequency; Euler-Bernouli; cantilever; piezoresistive; harmonic oscillator CNT; hair flow sensor; vibration resonance frequency; Euler-Bernouli; cantilever; piezoresistive; harmonic oscillator
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MDPI and ACS Style

Slinker, K.; Kondash, C.; Dickinson, B.T.; Baur, J.W. High-Bandwidth and Sensitive Air Flow Sensing Based on Resonance Properties of CNT-on-Fiber Hairs. C 2017, 3, 6.

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