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Sensors 2016, 16(10), 1656; doi:10.3390/s16101656

Analysis of Hollow Fiber Temperature Sensor Filled with Graphene-Ag Composite Nanowire and Liquid

1
College of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China
2
School of Electronics and Information Engineering, Tianjin Polytechnic University, Tianjin 300387, China
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Academic Editor: Vittorio M. N. Passaro
Received: 19 August 2016 / Revised: 29 September 2016 / Accepted: 29 September 2016 / Published: 8 October 2016
(This article belongs to the Section Physical Sensors)
View Full-Text   |   Download PDF [1992 KB, uploaded 8 October 2016]   |  

Abstract

A hollow fiber temperature sensor filled with graphene-Ag composite nanowire and liquid is presented and numerically characterized. The coupling properties and sensing performances are analyzed by finite element method (FEM) using both wavelength and amplitude interrogations. Due to the asymmetrical surface plasmon resonance sensing (SPR) region, the designed sensor exhibits strong birefringence, supporting two separate resonance peaks in orthogonal polarizations. Results show that x-polarized resonance peak can provide much better signal to noise ratio (SNR), wavelength and amplitude sensitivities than y-polarized, which is more suitable for tempertature detecting. The graphene-Ag composite nanowire filled into the hollow fiber core can not only solve the oxidation problem but also avoid the metal coating. A wide temperature range from 22 C to 47 C with steps of 5 C is calculated and the temperature sensitivities we obtained are 9.44 nm/ C for x-polarized and 5.33 nm/ C for y-polarized, much higher than other sensors of the same type. View Full-Text
Keywords: hollow fiber; birefringence; graphene-Ag composite nanowire; surface plasmon resonance (SPR) hollow fiber; birefringence; graphene-Ag composite nanowire; surface plasmon resonance (SPR)
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Xu, W.; Yao, J.; Yang, X.; Shi, J.; Zhao, J.; Zhang, C. Analysis of Hollow Fiber Temperature Sensor Filled with Graphene-Ag Composite Nanowire and Liquid. Sensors 2016, 16, 1656.

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