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Open AccessArticle

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

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
Zhejiang Lab, Hangzhou 310000, China
Author to whom correspondence should be addressed.
Sensors 2019, 19(2), 300;
Received: 15 December 2018 / Revised: 2 January 2019 / Accepted: 2 January 2019 / Published: 14 January 2019
(This article belongs to the Special Issue Advanced Nanomaterials based Gas Sensors)
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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MDPI and ACS Style

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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