%0 Journal Article 
%A Zarzuela Sánchez, Rafael
%A Moreno-Garrido, Ignacio
%A Blasco, Julian
%A Gil Montero, María Luisa Almoraima
%A Mosquera Díaz, María Jesús
%T Evaluation of the effectiveness of CuONPs/SiO2-based treatments for building stones against the growth of phototrophic microorganisms
%D 2018
%@ 0950-0618
%U http://hdl.handle.net/10498/38765
%X Colonization by phototrophic microorganisms causes a range of problems for building façades, The combination of biological physical and chemical agents accelerates the decay of materials. For this reason, in recent years there has been a growing interest in the application of multifunctional treatments that combine consolidant and biocidal action. In this study, the effectiveness of a nano-structured CuONPs/SiO2-based multifunctional treatment for the prevention of algal growth was evaluated on two different stones by using two complementary techniques, namely Chlorophyll a fluorescence and spectrophotometric determination. The results showed a delay in the algal colonization for two reasons: (1) The SiO2 matrix modified the roughness and surface tension, thus delaying the initial setting, and (2) the CuONPs decreased the viability of the phototrophic organisms at longer exposure times.
%~ Universidad de Cádiz