Potassium carbonate based electrolyte for electro-nanofabrication of tio2nanotube array electrode

摘要

High surface area electrodes and thin films has very technological applications in good number of devices such as Dye sensitized solar cells, fuel cells, storage devices etc for increasing the efficiency and reducing cost. Thin films made up of closely packed nanotubes can provide very high surface area and hence better performance in device structures and implant materials. However, for obtaining an optimum surface area great control over the transverse direction of growth needs to be achieved. With such control over the growth can produce well defined tube radius, wall width and tube separation. In the electro-nano farication technique the control can be achieved by controlling the electrochemical conditions such as voltage, electrolyte composition, temperature etc. Among this electrolyte composition is extremely critical in achieving good control in the transverse direction of growth to obtain well defined tube parameters such as tube radius and wall thickness. The new electrolyte we invented can tune the tube radius over a wide range of tube diameters with different composition and voltage in a well defined fashion.