Matching plasmon resonances to the C=C and C-H bonds in estradiol

摘要

We tune nanoantennas to resonate within mid-infrared wavelengths to match the vibrational resonances of C=C and C- H of the hormone estradiol. Modelling and fabrication of the nanoantennas produce plasmon resonances between 2 um to 7 um. The hormone estradiol was dissolved in ethanol and evaporated, leaving thickness of a few hundreds of nanometres on top of gold asymmetric split H-like shaped on a fused silica substrate. The reflectance was measured and a red-shift is recorded from the resonators plasmonic peaks. Fourier transform infrared spectroscopy is use to observe enhanced spectra of the stretching modes for the analyte which belongs to alkenyl biochemical group.