Connecting of localized surface plasmon resonance and electrochemical impedance spectroscopy for aqueous detection

Localized Surface Plasmon Resonance (LSPR) sensor of noble metallic nanoparticles is an impressive method for biological and chemical sensing application. It has been studied as one of the most versatile and sensitive optical methods for aqueous sensing in miniaturize system. The operation principle of LSPR is based on changes in optical response to the refractive index of the environmental1) . Electrochemical impedance spectroscopy (EIS) is well known as impressive method for characterizing the electrical properties of aqueous and their interfaces by electronically conducting electrodes2) . Connecting of LSPR sensor with different analytical methods in a compact device has challenges to obtain simultaneous sensing of several properties. Therefore, this study aimed is to develop an integration LSPR-EIS device onto a single sensor based on glass substrate for aqueous detection.