Conventional sensing techniques including electrochemical, voltammetric, colorimetry, and non-enzymatic are widely used for the detection of chronic diseases. However, such techniques suffer from poor selectivity, complexity, low sensitivity, monofunctional, and expensive development procedures, which limits its widespread and accessibility across the medical field. Replacing these techniques with localized surface plasmon resonance (LSPR) based optical sensors can be much more beneficial as these are real-time, label-free devices, highly reproducible, cheap, and hold higher sensitivity to changes in the refractive index of samples. The plasmonic nanoparticles like - Ag, Au and Cu are highly sensitive to their local environment and undergoes spectral response due to their strong scattering or absorption. The easy monitoring of these light signals paves the way for its utilization in the sensor market. This work studies the influence of morphology of Au on optical tapered fibers for sensing applications.
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