The main features of nanomaterials are reduced size and improved precision. The significance of nanomaterials is mainly reflected in the fact that within such a size range, the material objects studied will produce many unique properties that are different from macroscopic objects and single atoms and molecules, or have very significant improvements and enhancements to the original properties. The main limitations that lead to the unique properties of nanomaterials should be: specific surface effect, small size effect, interface effect and macroscopic quantum effect, etc. These effects make the physical properties of nanosystems such as light, electricity, heat, and magnetism different from those of conventional materials, and many novel properties appear. For example, light absorption is significantly increased, the melting point of metals is reduced, and microwave absorption is enhanced.