Titanium dioxide nanoparticles for pH sensor

TiO₂ nanoparticles-based interdigitated electrode is tested as pH electrodes and measured quantitatively. TiO₂ nanoparticle was synthesized via sol-gel method while interdigitated electrodes were fabricated by conventional photolithography method. Deposition of TiO₂ solution on the fabricated electrodes forms a sensor that promising for development of TiO₂ nanoparticles based biosensors. The extremely small amount of current measurement of this device towards hydrogen and hydroxide ions was measured by Keithley 6487 picoammeter.