Microbiología

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Activación foto- catalítica de nano partículas de MnO2 obtenidas a partir de ablación laser, aplicada a superficies auto-limpiantes
(Universidad Santiago de Cali, 2021) Villegas Díaz, Claudia Lorena; Ávila Torres, Yenny Patricia; Ríos Acevedo, John Jairo
The nano-particles of metallic materials have many applications, a field of special interest is the hospital, since there are many infections associated with health care (HAI) these infections must be related to hospitalization or procedures performed in the hospital. Mainly originated by Staphylococcus aureus and Escherichia coli, for this reason materials are required that are capable of eliminating these bacteria attached to it, and thus prevent the high number of infections (self-cleaning surfaces). A new material with these characteristics is manganese oxide (MnO2), used in the manufacture of steel, with which hospital equipment is manufactured. In this study, different factors affecting bactericidal photocatalysis were tested, showing that the attack is discriminated for gram positive and gram negative bacteria, the action mechanism is governed via hydroxyl radicals and to a lesser degree via superficial voids. Finally, a material with little recombination is obtained, which represents a success in the synthesis of metal oxide.