Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 251, Issue -, Pages 127-133Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2017.05.045
Keywords
AgNPs; Graphene; U-bent; SPR; fiber optic sensor
Funding
- National Natural Science Foundation of China [11474187, 11674199, 11604040, 61205174]
- Shandong Province Natural Science Foundation [ZR2014FQ032]
- China Postdoctoral Science Foundation [2016M600550, 2016M602716]
- Shandong Normal University
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We present a U-bent fiber optic SPR sensor based on the graphene/AgNPs, combined the virtues of graphene, AgNPs and U-bent fiber. By changing the laser-induced time, we achieved the optimal time for the deposition of AgNPs. With the proposed graphene/AgNPs U-bent fiber optic sensor, we discussed and investigated the SPR behaviors. The shifts up to 32 and 16 nm are observed respectively for the detection of 90% aqueous ethanol and 20% aqueous glucose, corresponding refractive index (RI) 1.3657 and 1.3557. The sensitivity of this proposed is calculated as 1198 nm/RIU and the response and recovery time of this U-bent fiber optic sensor are respectively 3 s and 80 s. These experimental results indicate that our proposed graphene/AgNPs U-bent fiber optic sensor will be expected to open new avenue for the detection in the field of medicine, biotechnology and food safety. (C) 2017 Published by Elsevier B.V.
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