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URN etd-0614104-125932 Statistics This thesis had been viewed 2247 times. Download 1232 times. Author Shao-Shan Nieh Author's Email Address email@example.com Department Bioengineering Year 2003 Semester 2 Degree Master Type of Document Master's Thesis Language English Page Count 57 Title Investigation of Surface Disinfection of Magnetron Sputtered Multiphase on Stainless Steel Keyword Staphylococcus aureus Multiphase Magnetron sputtering deposition Disinfection Disinfection Magnetron sputtering deposition Multiphase Staphylococcus aureus Abstract Abstract
Magnetron sputtering deposition (MSD) technologies allow the production of various structures of thin films on most metal surfaces. This permits many new applications, especially for so-called multiphase. In recent years, physical vapour deposition (PVD) was widely used in industries such as corrosion resistant coatings for aerospace, hard ceramic coatings for wear resistance, and coatings with novel biosensors and distinct from chemical properties. However the associated disinfection ability was poorly understood. Stainless steel has been extensively used in modern human life. For this reason, if surface modification technologies are used, it not only substantially increases the value of stainless steel but also expend scope of applications, such as to reduce a hospital or contact with public place acquired infection.
In order to find out the efficacy factors of antimicrobial coatings in the samples, the samples were divided into three groups: uncoated (Group A), TiN coatings (Group B) and the multiphase (Group C). In this study, Group A and Group B have no significant difference in antimicrobial rate. Group C having the results for coatings test shows the rate of Staphylococcus aureus reduction is more than 99%. It revealed that hybrid coatings (Ti-Ag) N can effectively inhibit the bacterial growth on stainless steel. In other words, multiphase leads to a better superior layer antimicrobial than TiN with a non-reactive surface modification. The particular aim of this study was focused on some relevant correlations between the surface of sputtering coated on stainless steel and the disinfection ability of this surface in air.
Keywords: Disinfection, Magnetron sputtering deposition, Multiphase,
Advisor Committee dcsheu - advisor
Kow-Jen Duan - co-chair
Files Date of Defense 2004-06-03 Date of Submission 2004-06-14