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- W4293712559 endingPage "133892" @default.
- W4293712559 startingPage "133892" @default.
- W4293712559 abstract "• BSA films are adsorbed on hydrophobic silicon surface. • Impact of Na + and Ca 2+ ions on structure is almost identical, unlike Y 3+ ions. • Tilted BSA monolayer is formed from ion free BSA solution. • Tilted bilayer of BSA molecules is formed for mono- and di-valent ions. • Tri-valent ions form tilted trilayer of BSA (but tetralayer is formed at 5 mM). Structure and morphology of bovine serum albumin (BSA) films adsorbed on hydrophobic silicon (H-Si) surface from BSA solution in presence of different cationic ions (Na + , Ca 2+ and Y 3+ ) are studied. Electron density profile as obtained from X-ray reflectivity analysis shows that ≈ 55 Å thick monolayer of pure BSA is adsorbed on H-Si surface, while atomic force microscopy image displays its globular morphology. A bilayer of globular BSA molecules of average thickness ≈ 85 Å is formed on the H-Si surface at 1–10 mM of Na + and Ca 2+ ions. However, Y 3+ ions favor the immobilization of a tri-layer of BSA on H-Si surface except for 5 mM, at which a tetralayer is formed due to the effect of re-entrant condensation of BSA solution. Elemental mapping analysis as obtained from scanning electron microscopy confirms that the attachment of Y 3+ ions is higher in comparison with Na + and Ca 2+ ions due to maximum charge density of hydrated Y 3+ ions. The contact angle results display intermediate hydrophobicity for Na + ions, whereas minimum and maximum hydrophobicity for Ca 2+ and Y 3+ ions interacted protein films, respectively. It is found that the adsorption of BSA is relatively higher in presence of all ions on hydrophobic surface than hydrophilic. All the adsorbed BSA films are found mostly stable with time." @default.
- W4293712559 created "2022-08-31" @default.
- W4293712559 creator A5054910286 @default.
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- W4293712559 date "2022-12-01" @default.
- W4293712559 modified "2023-09-29" @default.
- W4293712559 title "Effect of different valent ions (Na+, Ca2+ & Y3+) on structural and morphological features of protein (BSA) thin films adsorbed on hydrophobic silicon (H-Si) surface" @default.
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- W4293712559 doi "https://doi.org/10.1016/j.molstruc.2022.133892" @default.
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