Journal
OPTICS EXPRESS
Volume 24, Issue 25, Pages 28290-28302Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.24.028290
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Funding
- National Natural Science Foundation of China (NSFC) [61675092, 61475066, 21271087, 21476052, 61405075, 61576084, 61275046]
- National Youth Natural Science Foundation of China [61505069]
- Fundamental Research Funds for the Central Universities of China [21615307]
- Natural Science Foundation of Guangdong Province [2016A030313079, 2013B090600045, 2015A030313864, 2015A030313320, 2014A030313377]
- Special Funds for Major Science and Technology Projects of Guangdong Province [2015B010125007]
- Science and Technology Innovation Platform Project of Foshan City [2014AG100171]
- Project of Jinan University Undergraduate Innovating and Pioneering Training Program [CX16215]
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A fiber-optic toluene gas sensor based on reduced graphene oxide (rGO) is demonstrated and its sensing property is investigated experimentally and theoretically. The rGO film is deposited on a side polished fiber (SPF), allowing the strong interaction between rGO film and propagating field and making the SPF sensitive to toluene gas. It is found that the sensor has good linearity and reversibility and can work at room temperature with the response and the recovery time of 256 s and the detection limit of 79 ppm. Moreover, a theoretical model for the sensor is established to analyze the sensing mechanism. Theoretical analysis indicates this type of sensor could work in a wide range of toluene gas concentration and shows that a significant rise in its sensitivity can be expected by adjusting the doping level or chemical potential of graphene. (C) 2016 Optical Society of America
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