Metal oxides are used in a wide range of scientific and technical applications and in many chemical compounds. Metal oxides are used in various electronic systems and have different dielectric and semiconductor properties. In technological and practical applications, oxides are employed in the manufacture of microelectronic circuits, sensors, fuel cells, exterior-layer anti-rust coatings, and catalysts. The production of nanomaterials with better functional qualities is a major goal in this applied research area. Due to their limited dimensions and increased angle mass, chemical compound nanoparticles have unique physicochemical characteristics. Their particle size is believed to establish the essential elements of any material, such as lattice symmetry and cell parameters. Oxides are usually solid, stable, and have well-defined crystallographic structures. However, the impact of surface energy and stress grows with decreasing particle size. Their size may create structural and cell restriction changes.

Metal oxide semiconductor nanostructures are most widely investigated for applications such as the generation of contemporary solar cells, optoelectronic and acoustic devices, liquid crystal devices, and detectors because they have the most substantial quantum effect among various one-dimensional nanomaterials. Metallic and metal oxide nanoparticles have physicochemical versatility, specific reactivity and surface chemistry, unique intrinsic functionality (mechanical behavior, thermal and magnetic features, optical and electric properties, catalytic activity), and specific biological effects (biocompatibility and non-immunogenicity, antioxidant and anti-inflammatory action, antimicrobial and antitumor efficiency, restorative and regenerative potential). Metallic and metal oxide nanoparticles are useful in environmental applications, electronics, and energy production, textile and food industries, pharmaceutical and cosmetic goods, wound healing, and tissue engineering.

As a result, this Special Issue focuses on the synthesis, characterization, and applications of metal and metal oxide nanomaterials. Original research, as well as review papers, are invited.

Potential topics include but are not limited to the following:

• Engineering applications of metal and metal oxide nanomaterials
• Green chemistry principles on the synthesis of nanomaterials
• Physical characterization of metal and metal oxide nanomaterials
• Environmental applications of metal and metal oxide nanomaterials
• Case studies or applications of metal oxide nanomaterials
• Biomedical applications of metal oxide nanomaterials
• Synthesis of metal and metal oxide nanomaterials
• Biomedical applications of metal oxide nanomaterials