Electrochemical study of TiO<inf>2</inf> thin film on aluminium electrode for glucose detection

This paper presents the fabrication of Interdigitated Electrodes (IDEs) towards the detection of glucose. The transducer is constructed based on IDE because of its single layer electrode structure. Majority of IDE used metal such as gold and nickel as the electrodes because of their excellent electrical performances. However, in this paper, aluminium is applied as metal of electrodes not only because of its stable material but also trying to investigate the interaction between aluminium metal and Titanium dioxide, TiO2 with glucose detection. Titanium dioxide has been utilized as thin film on the deposited aluminium electrodes to increase the interaction between aluminium electrodes with different concentration of glucose solution. The designs of IDEs interdigitated array (IDBA) and interdigitated ring array (IDRA) are performed by using AUTOCAD and it is printed on a transparency paper as a mask. Customary photolithography methods with positive resist are applied to transfer the pattern on a silicon wafer in this fabrication process. Then, the fabricated IDEs are viewed and examined under Scanning Electron Microscope (SEM) and Atomic Force Microscope (AFM) to verify the surface morphology and topology. The electrochemical performance of IDEs is observed through cyclic voltammogram characteristics performed using potentiostat. In the nut shell, both IDBA and IDRA are tested within 0 to 100 mM range of glucose concentration.