“…It has an energy band-gap of 3.37 eV and an exciton binding energy of approximately 60 meV, characteristics that make possible its use for different electronic devices as diodes, field-effect transistors, conductometric sensors and dye-sensitized solar cells [11][12][13][14][15][16]1,8,9]. Nowadays, several techniques are being used to synthesize different nanostructures of this material; sol-gel and hydrothermal methods [7,1,6,4,9,5,17], chemical vapor deposition [18][19][20][21][22][23][24] and physical vapor deposition [25,26,2]. The products of these processes include nanoparticles, thin films, nanowires, nanorods and nanobelts.…”