From Princeton Plasma Physics Laboratory: An invention to apply plasma to frequently touched items for continuous disinfection could provide a safe and effective, non-chemical way to reduce pathogens on various surfaces such as keypads, escalator handrails and other high-touch surfaces, Princeton Plasma Physics Laboratory (PPPL) inventors say. https://www.princeton.edu/news/2020/10/12/invention-sparked-covid-19-pandemic-safely-disinfects-surfaces-continuously%20