Variable section ZnO nanostructures electrodeposited by dynamic polarization currents

In this work we propose a single procedure for the electrochemical growth of variable section, self-assembled ZnO columns by dynamic polarization currents instead of the conventional potentiostatic/galvanostatic procedures. A flexible ITO electrode was submerged in 5 mM ZnCl + 0.1KCl and the ZnO structures were formed by galvanodynamic current ramps. Some of the structures analyzed showed columns with variable sections and others showed hollow columns. The possibility of modifying the section would enhance the properties of ZnO nanostructured layers, since this would increase the specific area and the light-capturing capacity of solar devices and sensors.