ZnO has been the central theme of research in the past decade due to its various applications in band gap engineering, and textile and biomedical industries. In nanostructured form, it offers ample opportunities to realize tunable optical and optoelectronic properties and it was also termed as a potential material to realize room temperature ferromagnetism. This book presents 17 high-quality contributory?chapters on ZnO related systems written by experts in this field. These?chapters will help researchers to understand and explore the varied physical properties to envisage device applications of ZnO in thin film, heterostructure and nanostructure forms.In seventeen chapters contributed by experts in the field, this book explores the varied physical properties of ZnO nanocrystals, helping researchers envisage device applications of ZnO and allied materials in thin film, heterostructure nanostructure forms.Zinc Oxide: The Versatile Material with an Assortment of Physical Properties.- Laser Nano-Soldering of ZnO Nanowires and GaN Thin Film for Fabrication of Hetero p-n Junction.- Photoluminescence Processes in ZnO Thin Films and Quantum Structures.- Effect of Oxygen Pressure on Photoluminescence Spectra and Hall Coefficients of Li-Ni co-doped ZnO Films Grown by a Pulsed Laser Deposition.- Lasing Characteristics of an Optically-pumped Single ZnO Nanocrystal and Nanomachining for Controlling Oscillation Wavelength.-? Deposition of Aluminum-doped ZnO Films by ICP Assisted Sputtering.- Control of ZnO Nanocrystals Synthesized by Nanoparticle-assisted Pulsed Laser Deposition using Buffer Layer and Laser Irradiation.- Influence of Sb as a Catalyst in Synthesize of Sb Doped ZnO Nanostructures using NAPLD (Nano Particle Assisted Pulsed Laser Deposition) for UV LED Applications.- Time- and spatially-resolved Luminescence Spectroscopy of ZnO Nanostructures.- Synthesis of Polycrystalline Silicon Carbide (SiC) Thin Film Using Pulsed Laser Deposition.- Preparation and Characterizatil