Explanation

It means that when the particle size of the material is equal to or higher than the physical characteristics such as light wave length, de Broglie wavelength and the coherence length of the superconducting state state, the periodic boundary condition of the crystal of the material will be destroyed, resulting in the change of new physical properties of the mechanical, thermal, acoustic, optical, electrical, magnetic and other characteristics. Compared with conventional bulk materials, the absorption and emission spectrum spectra of nanocrystals have a blue shift, that is, they shift to the short wavelength direction. In addition, superconductivity, unique dielectric properties and chemical properties are also shown in ultra small particles.

Classification