In this study, a novel optical fiber sensor based on varying cladding diameters is developed to detect different tyramine concentrations. Single-mode fiber (SMF, 8.25/125 μm) and multimode fiber (MMF, 200/220 μm) are fused to form the SMF-MMF-SMF structure. The output signal is amplified by etching the fiber sensing region that can generate stronger evanescent fields. Multi-walled carbon nanotubes (MWCNTs) are used to enhance the sensing performance. The tyramine enzyme is used to functionalize the probe and realize the specificity of the probe for tyramine. The performance of the sensor is analyzed, and results show that the sensor has good selectivity. The results also show that the sensors based on different cladding diameters can be used as special sensors for measuring the concentration of tyramine.
The detection of glucose level in human body is very necessary for motoring physical condition. In our work, a triple tapered sensor probe based localized surface plasmon resonance (LSPR) is developed to detect various glucose concentration solution. The single-mode fiber (SMF) is utilized to prepare the proposed triple tapered structure. The serial taper structure in the sensing area insure more evanescent wave (EW) leak out. Gold nanoparticles (AuNPs) are modified on the serial triple tapered fiber (STTF) structure to stimulate the LSPR phenomenon. The limit of detection (LOD) and sensitivity of sensor are 3.8 mM and 0.59 nm/mM, respectively. Moreover, the reproducibility, selectivity, pH test, and reusability of STTF probe are evaluated to validate the ability in practice.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.