Development and optimization of gold triangular nanoantennas for advancing biosensor technology

Optical sensors offer a wide spectrum of subtance detection capabilities, from biological sample diagnostics to hazardous material identification. As a valuble alternative to complex analytical techniques, these sensors ensure rapid results with minimal or no sample preparation, though lacking reusability. By exponsing metal nanoantennas to light at resonant wavelengths, collective oscilations termed localized surface plasmon resonances (LSPR) are induced through the excitation of conduction electrons. Inthis study, we present an innovative optical sensor featuring achieved using electron beam lithography (EBL) to create a 10x10 micron array, with each triangular gold nanoantenna measuring 285.3 nm in height. Analyzing the sensor´s optical properties through Fourier Transformation Infrared Spectroscopy (FTIR), we examined reflectance as a fuction of wavelength to determine resonance wavelengths.