Metal oxides are used in a wide range of scientific and technical applications, as well as a large number of chemical compounds. Metal oxides are used in a wide range of electronic systems and have distinct dielectric and semiconductor properties. Oxides are employed in the manufacture of microelectronic circuits, sensors, fuel cells, exterior-layer anti-rust coatings, and catalysts in technological and practical applications. Nanomaterials having better qualities than bigger or nanoparticle materials are the goal of a burgeoning subject of applied research. Because of their limited dimensions and increased mass of angle, chemical compound NPs have unique physico-chemical characteristics. Their particle size is believed to establish the basic characteristics of any material, such as lattice symmetry and cell parameters. Oxides are usually solid, stable, and have well-defined crystallographic structures. With decreasing particle size, however, the impact of surface energy and stress grows. Their size may create structural and/or cell restriction changes.

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

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

The following are some examples of possible themes:

· Engineering applications of metal and metal oxide nanomaterials

· Green chemistry principles on synthesis

· 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