Salt melting below the boiling point of water (< 100°C) produces ionic liquids (ILs). The term room-temperature ionic liquids, or RTILs, is usually reserved for ionic melts with melting points below room temperature. ILs form liquids that consist only of cations and anions. ILs are usually characterised by a reasonable ionic conductivity (similar to most non-aqueous electrolytes). ILs'extremely low vapour pressure is non-volatile, and ILs are highly polar, miscible with certain organic solvents and/or water, and have good solubility with organicand inorganic materials. They are also chemically inert, reusable and can bedesigned, nonflammable and thermally stable as well.1–3 ILs is promising andenvironmentally benign, and have numerous reaction media which are expected to provide an attractive alternative to conventional volatile organic compounds(VOC). Nevertheless, in the last few years, they have become more attractive inother fields, such as catalysis,4 basic electro-chemical studies of organic andinorganic compounds5, formation of metal nanostructures,6 analytical chemistry7including sensors,8 bio-analytical chemistry,9 and electro-chemical biosensors.10