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2. ENGINEERING AND TECHNOLOGY
We studied the effect of a star-shaped gold nanoparticles layer coated on the surface of the microfiber coupler (MFC) on the sensitivity of the embedded MFC biosensor. It is shown that deposition of the layer of star-shaped gold nanoparticles on the MFC sensor surface results in a significantly increased spectral shift (on average 3.05 nm shift compared to a 1.08 nm shift per layer of electrolyte for the sample without the nanoparticles layer). In addition, introducing the nanoparticle layer results in the decrease of the transmission power; measurement of the changes in transmission also could be used as a means for the sensor interrogation.
Semenova, Y., Farrell, G., & Wang, P. (2014). Microfiber Coupler Based Biosensor Incorporating a Layer of Gold Nanoparticles with Improved Sensitivity, Proceedings of SPIE - The International Society for Optical Engineering, vol. 91578T-1. doi: 10.1117/12.2059662