Abstract: A dispersible nanoparticle (200) for use in anti-pathogenic applications is presented. The dispersible nanoparticle has a core (210) made of a metal or a metal alloy compound. The core (210) is coated with at least one of a carboxylic acid and a water soluble polymer (220). Also presented is a membrane coated with the dispersible nanoparticles and a corresponding method of coating the membrane. The membrane may be used is various products including a face mask and an air filter for use in an air conditioning unit.