Citation:

K. Pandiayaraj, N., R. Deshmukh, R. Mahendiran, P. Su, E. Yassitepe, I. Shah, S. Perni, P. Prokopovich, AND M. Nadagouda. Influence of Operating Parameters on Surface Properties of RF Glow Discharge Oxygen Plasma Treated TiO2/PET Film for Biomedical Application. Materials Science and Engineering: C. Elsevier B.V., Amsterdam, Netherlands, 36:309-319, (2014).

Impact/Purpose:

Water Treatment

Description:

Thin transparent titania (TiO2) films were coated on the surface of flexible poly (ethylene terephthalate) (PET) surface using standard sol gel techniques. The TiO2/PET thin film surfaces were further modified by exposing the films to a RF glow discharge oxygen plasma. The exposure time and rf discharge power were varied in order to study changes in the properties of the film. The structure and chemical states of the plasma treated samples were analyzed by X-ray diffraction pattern (XRD) and X-ray photo electron spectroscopy (XPS) techniques. The topography of TiO2/PET films was investigated by atomic force microscopy (AFM). The changes in hydrophilicity with exposure time and power of the modified film was analyzed by contact angle measurements and surface energy analysis The antibacterial activities of TiO2/PET films were also evaluated by bacterial eradication tests with Staphylococcus at incubation time of one day. The results indicate that surface hydrophilicity is improved due to increasing the roughness and the introduction of oxygen containing polar groups. An increase of Ti3+ state and oxygen containing polar groups increase with oxygen plasma treatment time. The roughness of the surface increases on account with oxygen plasma treatment intensity. The bacterial test results show a reduction of adhesion of staphylococcus bacteria on the surface of TiO2/PET films compared with untreated PET film surface.

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