Two-Dimensional Zinc Oxide and Manganese(II, III) Oxide Nanocrystals Having Perforated Nanosheet Morphology Prepared by the Surface Hydrolysis of Mn(OAc)₂ and Zn(OAc)₂ Aqueous Solutions with Gaseous Ammonia

We are the first to show that 2D ZnO nanocrystals with the wurtzite structure and Mn₃O₄ nanocrystals with the hausmannite structure having perforated nanosheet (PNS) morphology can be prepared on the basis of compounds that are formed in reactions occurring on the surface of aqueous solutions of corresponding metal acetates exposed to gaseous NH₃. Application of these nanocrystals on silicon makes the silicon surface hydrophobic in the case of ZnO and superhydrophilic in the case of Mn₃O₄. The proposed synthetic method can provide sequential and multiple deposition of these compounds on a substrate. Such “multilayers” can exhibit new properties.