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Humidity_Ahmed_Hartings.pdf (451.68 kB)

Humidity Responsive Photonic Sensor based on a Carboxymethyl Cellulose Mechanical Actuator

preprint
submitted on 12.10.2017, 13:20 and posted on 16.10.2017, 15:19 by Matthew Hartings, Kevin O. Douglass, Claire Neice, Zeeshan Ahmed
We describe an intuitive and simple method for exploiting humidity-driven volume changes in carboxymethyl cellulose (CMC) to fabricate a humidity responsive actuator on a glass fiber substrate. We optimize this platform to generate a photonic-based humidity sensor where CMC coated on a fiber optic containing a fiber Bragg grating (FBG) actuates a mechanical strain in response to humidity changes. The humidity-driven mechanical deformation of the FBG results in a large linear change in Bragg resonance wavelength over the humidity range of 5 %RH (relative humidity) to 40 %RH. The measurement uncertainty over this range is ± 2 %RH.

History

Topic

  • Thin Films

Email Address of Submitting Author

hartings@american.edu

Email Address(es) for Other Author(s)

kevin.douglass@nist.gov cneice8@vt.edu zeeshan.ahmed@nist.gov

Institution

National Institute of Standards and Technology

Country

USA

ORCID For Submitting Author

0000-0003-0658-939X

Declaration of Conflict of Interest

no conflict of interest

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in Sensors and Actuators B: Chemical

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