Zinc oxide (ZnO) possesses many desirable photonic, electronic, and electrochemical properties. By tuning the nanoscale morphology of ZnO, outsized effects within zinc oxide nanocrystals can arise, including increased photo-optic response, heightened catalytic effects, and high piezoelectricity, among others. The reactive inkjet printing method is explored in this work to demonstrate the feasibility of defining ZnO morphology on a drop-on-demand basis. This work has been carried out to identify reaction conditions and morphological products for the conversion of Zinc Acetylacetonate [Zn(AcAc)2] to ZnO by applying thermal, chemical, and photonic inputs. The use of in-line UV irradiation for reactive inkjet printing was especially investigated to control ZnO morphology fabricated, and to evaluate patternability and scalability of the approach. Reactive inkjet deposited ZnO are characterized upon a range of UV irradiation, by x-ray diffraction, scanning electron microscopy, and UV-Vis spectroscopy.