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Sensors 2019, 19(2), 300; https://doi.org/10.3390/s19020300

An Ethanol Vapor Sensor Based on a Microfiber with a Quantum-Dot Gel Coating

1
Centre for Optical and Electromagnetic Research, State Key Laboratory of Modern Optical Instrumentation, Zhejiang Provincial Key Laboratory for Sensing Technologies, Zhejiang University, Hangzhou 310058, China
2
Zhejiang Lab, Hangzhou 310000, China
*
Author to whom correspondence should be addressed.
Received: 15 December 2018 / Revised: 2 January 2019 / Accepted: 2 January 2019 / Published: 14 January 2019
(This article belongs to the Special Issue Nanomaterials based Gas Sensors)
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Abstract

An ethanol vapor sensor based on a microfiber with a quantum-dot (QD) gel coating is proposed and demonstrated. The QD gel was made from UV glue as the gel matrix and CdSe/ZnS QDs with a concentration of 1 mg/mL. The drawing and coating processes were conducted by using a simple and low-cost system developed for this study. Bending, ethanol sensing, temperature response, and time response tests were carried out, respectively. The experimental results showed that the fabricated sensor had a high sensitivity of −3.3%/ppm, a very low temperature cross-sensitivity of 0.17 ppm/°C, and a fast response time of 1.1 s. The easily fabricated robust structure and the excellent sensing performance render the sensor a promising platform for real ethanol sensing applications. View Full-Text
Keywords: optical fiber ethanol sensor; microfiber; quantum-dot gel optical fiber ethanol sensor; microfiber; quantum-dot gel
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Hu, S.; Yan, G.; Wu, C.; He, S. An Ethanol Vapor Sensor Based on a Microfiber with a Quantum-Dot Gel Coating. Sensors 2019, 19, 300.

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