Mechanochemical synthesis of non-stoichiometric copper sulfide Cu1.8S applicable as a photocatalyst and antibacterial agent and synthesis scalability verification / Matej Baláž, Adrian Augustyniak, Batukhan Tatykayev, Zhandos Shalabayev, Gairat Burashev, Erika Dutková, Nina Daneu, Jaroslav Briančin, Ľudmila Balážová, Ľudmila Tkáčiková, Martin Stahorský, Marcela Achimovičová, Peter Baláž KE304