测量应用案例-20191002
2019-10-22 10:28
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The inherent physicochemical properties of engineered nanomaterials (ENMs) are known to control the sorption of proteins, but knowledge on how the release of ENMs to the environment prior to protein exposure affects this reaction is limited. In this study, time-resolved, in situ infrared spectroscopy was used to investigate the sorption of a model protein, bovine serum albumin (BSA), onto two different types of titanium dioxide (TiO2) ENMs (catalytic-grade P90 and food-grade E171) in the presence and absence of a simple dissolved organic carbon molecule, oxalate. Infrared spectroscopy results showed that oxalate adsorbed to P90 through chemisorption interactions, but it adsorbed to E171 through physisorption interactions due to the presence of inherent surface-bound phosphates.
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