article_snippet: To create the charged droplets, which measure just 25 nanometres, the team led by Philip Demokritou, sprayed water though a strong electrical field - a technique known as electrospraying.
article_snippet: The water molecules split into hydroxyl and superoxide radicals, which are usually unstable, Environmental Technology reported.
article_snippet: But in the electrospray, a thin layer of charged water captures the radicals and stabilises the radicals.
article_snippet: The electrical charge serves to boost each droplet’s surface tension so that The electrical charge stops the radicals evaporating.
article_snippet: ‘EWNS possess unique properties; EWNS are 25 nm in diameter, remain airborne in indoor conditions for hours, contain Reactive Oxygen Species and have very strong surface charge,’ the study said.
highlights_snippet: Experts made droplets using electrically charged water and free radicals .
  