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Meeting Materials Science & Technology 2020
Symposium Next Generation Biomaterials
Presentation Title Three High Entropy Alloys and their Ability to Control Biofilm Formation
Author(s) Hideyuki Kanematsu, David Kemény, Eva Fazakas, Attila Szabo, Dana M. Barry, Nobumitsu Hirai, Akiko Ogawa, Takeshi Kogo, Noriyuki Wada, Hidemi Nakamura, Paul McGrath
On-Site Speaker (Planned) Hideyuki Kanematsu
Abstract Scope Biofilms are thin, inhomogeneous film-like matter that form on materials’ surfaces as a result of bacterial activities. They cause many problems like slime and scale buildup in pipes, corrosion of structures, food contamination, the spread of disease, etc. Since the substrate material is one of the important factors affecting biofilm formation, the development of new alloys (for substrates) is a promising countermeasure. In this study, we focused on three kinds of high entropy alloys: 16%Al-16%Ti-16%Ni-16%Cu-16%Ag-16%Sn, 20%Al-20%Ti-20%Ni-20%Cu-20%Fe and 22.5%Al-22.5%Ti-20%Ni-20%Cu-20%Fe. These alloys were all immersed into wells containing liquid cultures with bacteria. Later, the alloys were removed and checked / evaluated by Raman Spectroscopy and crystal violet staining methods to determine the biofilm formation capability of the samples. The results were noted and compared. Differences among specimens were also analyzed to provide useful information about their ability to control biofilm formation.


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