OICC Press International Nano Letters 2228-5326 6 3 (September 2016) 2016 07 07 Biocidal properties study of silver nanoparticles used for application in green housing 10.1007/s40089-016-0186-7 EN Siim Küünal Tartu College, Tallinn University of Technology, Tartu, 51008, EE Sander Kutti Tartu College, Tallinn University of Technology, Tartu, 51008, EE Protima Rauwel Institute of Physics, University of Tartu, Tartu, EE Mithu Guha Department of General and Molecular Pathology, Faculty of Medicine, University of Tartu, Tartu, EE David Wragg Department of Chemistry and SMN, University of Oslo, Oslo, NO Erwan Rauwel Tartu College, Tallinn University of Technology, Tartu, 51008, EE Journal Article 2016 07 07 Abstract We report on the study of surfactant-free silver nanoparticles synthesized using non-hydrolytic sol–gel methods for applications in straw bale constructions. Micro-organism infestation in green constructions is of concern as their proliferation tends to induce health problems. We demonstrate the biocidal properties of these Ag nanoparticles and their efficacy against fungi. Outdoor tests with Ag nanoparticles have demonstrated the effective protection of straw against micro-organisms. Indoor tests using broth liquid are compared with a method of testing we recently developed where the possible nature of the biocidal properties of the silver nanoparticles are further probed. In contrast to the commonly reported results, this study shows that Ag nanoparticles synthesized using non-hydrolytic sol–gel methods have antifungal properties against common fungi in outdoor conditions which demonstrate high potential in related applications.