Browsing by Author "Bermeo Acosta, Franklin (Director)"
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Item Estudio de películas de titanio-plata aplicaciones protectoras en dispositivos biomédicos(Universidad Santiago de Cali, 2021) Mina Aponza, Sebastián; Castro Narváez, Sandra Patricia (Directora); Bermeo Acosta, Franklin (Director)The search for coatings that prolong the useful lifetime of biomedical devices has been of interest, titanium being of great relevance due to its innocuousness and low reactivity. This study contributes to the investigation of Ti/Ag films in different configurations (mono and multilayer), deposited by magnetron sputtering. The sessile drop technique is implemented to study wettability, obtaining greater penetrability of the films where Ag is arranged as an external layer, confirming high efficiency in cell adhesion. The morphological properties were characterized by SEM, showing porous nuclei on the surface in the Ag coating and crystals embedded in the Ti film. The structural properties were studied by XRD revealing the presence of TiO2 in the crystalline phase of anatase in a proportion of 49.9% and silver forming a cubic lattice centered on the faces. Tafel polarization curves demonstrate improvements in Ag/Ti/Ag/Ti/Ag/Ti and Ti/Ag corrosion current densities versus Ag coating with 0.1749, 0.4802 and 2.044 nA*cm-2 respectively. The antimicrobial activity was evaluated against Pseudomonas aeruginosa bacteria, Bacillus subtilus and the yeasts Candida krusei, Candida albicans reveal that Ti/Ag and Ag/Ti/Ag/Ti/Ag/Ti coatings exhibit promising applications as biomedical material.