Artificial Taste Sensor: Efficient Combination of Sensors Made from Langmuir−Blodgett Films of Conducting Polymers and a Ruthenium Complex and Self-Assembled Films of an Azobenzene-Containing Polymer

摘要: An artificial tongue composed of four sensors made from ultrathin films deposited onto gold interdigitated electrodes has been able to distinguish easily the basic tastes (salty, sour, sweet, and bitter), in addition detecting inorganic contaminants ultrapure water identifying different brands coconut water. Some tastants were detected below human threshold values, for example, 5 mM NaCl or sucrose. Suppression quinine by sucrose was also detected. The high sensitivity may be partially attributed nature as produced with Langmuir−Blodgett 16-mer polyaniline oligomer, polypyrrole, a ruthenium complex self-assembled an azobenzene-containing polymer. sensor response evaluated ac measurements taken at various frequencies, admittance being treated theoretically equivalent circuit representing immersed polyelectrolyte solution.