Principle is the ultraviolet wavelength in the 240 ~ 280nm range of the most lethal. Easily destroy the DNA (deoxyribonucleic acid) or RNA (ribonucleic acid) in the molecular structure of bacteria and viruses, resulting in the growth of cell death and (or) regenerative cell death, to achieve the effect of sterilization. Especially in the wavelength of 253.7 when the strongest bactericidal effect of ultraviolet light. This band and the microbial cell nucleus of deoxyribonucleic acid UV absorption and photochemical sensitivity range overlap. So this time the sterilization effect is the best.
Expanded information1) In recent years, due to the progress of the development of high-power ultra-high-power low-pressure UV discharge tubes, as well as with the microelectronics and other products of the microfabrication, microelectronics, ultra-precision devices, and other products of the manufacturing process, by the short-wavelength ultraviolet and its ozone produced by the surface of the product to carry out ultra-precision cleaning or to improve the adhesion of the surface.
②Ultraviolet light for the wavelength between 16-397nm electromagnetic waves, TOC degradation instrument photon energy is low, not enough to make atoms or molecules ionized, so it is non-ionizing radiation. According to the wavelength can be divided into A wave, B wave, C wave and vacuum ultraviolet.
Reference:Baidu Encyclopedia "Ultraviolet sterilization"