Abstract
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 16nm 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 1198nm/RIU and the response and recovery time of this U-bent fiber optic sensor are respectively 3s and 80s. 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.
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