Abstract:
ZnO nanorods arrays were prepared on soda lime glass substrate by pulsed laser deposition
method. Hexagonal rod-like ZnO rods were obtained under different conditions.Well-defined ZnO nanorods
arrays were selected among different samples having various morphologies and sizes already studied by
X-ray diffraction (XRD) and atomic force microscopy (AFM). Here, we report on the contact angle measurement
(CAM) of one of these samples. A systematic change of the surface wettability is observed in
W-doped ZnO nanostructures. The water contact angle (WCA) of a 1 wt.% of WO3 target content was
found to be the transition doping level from hydrophilic surface to a hydrophobic surface. We attributed
the transition in surface wettability of the film with the doping to incorporation increase of tungsten into
the film. Such characteristic surface wettability can play a key role in the adhesion of various layers on
W-ZnO nanorods arrays for optoelectronic device applications.
