Glancing Angle synthesised MnO2 Nanowire array based fast response schottky detector

In this paper, vertically aligned MnO₂ nanowire (NW) array were fabricated on silicon (Si) by using glancing angle deposition (GLAD). Successful formation of the NW can be confirmed from the field emission scanning electron microscope (FESEM). Optical absorption shows the absorption in visible region which corresponds with the bandgap of MnO₂. From Tauc plot, the optical bandgap was found to be 2.7 eV and 1.8 eV. Under light illumination, there is a dramatic increase of photocurrent due to the electric field formed between Gold (Au) and MnO₂ NW. The photoresponse measurement shows that the rise time(t_r) and fall time (t_f) of the NW are 0.18 s and 0.16 s respectively. MnO₂ NW proves to be a good candidate for optoelectronics application.