Please use this identifier to cite or link to this item: http://localhost/handle/Hannan/164478
Title: High Sensitivity Ammonia Gas Sensor Based on a Silica-Gel-Coated Microfiber Coupler
Authors: Lei Sun;Yuliya Semenova;Qiang Wu;Dejun Liu;Jinhui Yuan;Tao Ma;Xinzhu Sang;Binbin Yan;Kuiru Wang;Chongxiu Yu;Gerald Farrell
Year: 2017
Publisher: IEEE
Abstract: In this paper, a high-sensitivity ammonia gas sensor is proposed based on a silica-gel-coated microfiber coupler (MFC). The MFC structure is formed by the two tapered fibers with 3 &x03BC;m waist diameter each, which were fabricated by using a customized microheater brushing technique. Silica gel coating was prepared by a sol-gel technique and applied on the surface of the MFC as a thin layer. The spectral characteristics of the proposed sensor were studied under various ammonia gas concentrations. The experimental results show that the coating thickness strongly affected the sensitivity of the MFC-based sensor to ammonia gas concentration. For the sensor with a 90 nm silica gel coating thickness, the highest measurement sensitivity is 2.23 nm/ppm for ammonia gas concentration, and the resolution is as good as 5 ppb, while the measured response and recovery times are ~50 and 35 s, respectively. Finally, it is demonstrated that the proposed sensor offers good repeatability and selectivity to ammonia gas.
URI: http://localhost/handle/Hannan/164478
volume: 35
issue: 14
More Information: 2864,
2870
Appears in Collections:2017

Files in This Item:
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7920327.pdf653.7 kBAdobe PDF
Title: High Sensitivity Ammonia Gas Sensor Based on a Silica-Gel-Coated Microfiber Coupler
Authors: Lei Sun;Yuliya Semenova;Qiang Wu;Dejun Liu;Jinhui Yuan;Tao Ma;Xinzhu Sang;Binbin Yan;Kuiru Wang;Chongxiu Yu;Gerald Farrell
Year: 2017
Publisher: IEEE
Abstract: In this paper, a high-sensitivity ammonia gas sensor is proposed based on a silica-gel-coated microfiber coupler (MFC). The MFC structure is formed by the two tapered fibers with 3 &x03BC;m waist diameter each, which were fabricated by using a customized microheater brushing technique. Silica gel coating was prepared by a sol-gel technique and applied on the surface of the MFC as a thin layer. The spectral characteristics of the proposed sensor were studied under various ammonia gas concentrations. The experimental results show that the coating thickness strongly affected the sensitivity of the MFC-based sensor to ammonia gas concentration. For the sensor with a 90 nm silica gel coating thickness, the highest measurement sensitivity is 2.23 nm/ppm for ammonia gas concentration, and the resolution is as good as 5 ppb, while the measured response and recovery times are ~50 and 35 s, respectively. Finally, it is demonstrated that the proposed sensor offers good repeatability and selectivity to ammonia gas.
URI: http://localhost/handle/Hannan/164478
volume: 35
issue: 14
More Information: 2864,
2870
Appears in Collections:2017

Files in This Item:
File SizeFormat 
7920327.pdf653.7 kBAdobe PDF
Title: High Sensitivity Ammonia Gas Sensor Based on a Silica-Gel-Coated Microfiber Coupler
Authors: Lei Sun;Yuliya Semenova;Qiang Wu;Dejun Liu;Jinhui Yuan;Tao Ma;Xinzhu Sang;Binbin Yan;Kuiru Wang;Chongxiu Yu;Gerald Farrell
Year: 2017
Publisher: IEEE
Abstract: In this paper, a high-sensitivity ammonia gas sensor is proposed based on a silica-gel-coated microfiber coupler (MFC). The MFC structure is formed by the two tapered fibers with 3 &x03BC;m waist diameter each, which were fabricated by using a customized microheater brushing technique. Silica gel coating was prepared by a sol-gel technique and applied on the surface of the MFC as a thin layer. The spectral characteristics of the proposed sensor were studied under various ammonia gas concentrations. The experimental results show that the coating thickness strongly affected the sensitivity of the MFC-based sensor to ammonia gas concentration. For the sensor with a 90 nm silica gel coating thickness, the highest measurement sensitivity is 2.23 nm/ppm for ammonia gas concentration, and the resolution is as good as 5 ppb, while the measured response and recovery times are ~50 and 35 s, respectively. Finally, it is demonstrated that the proposed sensor offers good repeatability and selectivity to ammonia gas.
URI: http://localhost/handle/Hannan/164478
volume: 35
issue: 14
More Information: 2864,
2870
Appears in Collections:2017

Files in This Item:
File SizeFormat 
7920327.pdf653.7 kBAdobe PDF