同位素分析仪-甲醛分析仪-北京世纪朝阳科技发展有限公司

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Reversible pH Responsive Bovine Serum Albumin Hydrogel Sponge Nanolayer

2021-01-20 13:41:08

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作者:Vikram Singh Raghuwanshi*, Brendan Yu, Christine Browne and Gil Garnier*

Bioresource Processing Research Institute of Australia (BioPRIA), Department of Chemical Engineering, Monash University, Clayton, VIC, Australia

 

摘要:A pH dependent reversible sponge like behavior of a bovine serum albumin (BSA) nanolayer adsorbed at the gold-saline interface is revealed by quartz crystal microbalance with dissipation (QCM-D), atomic force microscope (AFM) and contact angle measurements. During the saline rinsing cycles, the BSA layer adsorbs water molecules at pH 7.0 and releases them at pH 4.5. The phenomenon remains constant and reproducible upon multiple rinsing cycles. The BSA layer thickness also increases upon rinsing with saline at pH 7.0 and reverses back to its original thickness at pH 4.5. Varying ionic strength with water further desorbs more water molecules from the BSA layer, which decreases its mass and thickness. However, upon both pH and ionic strength changes, all the BSA molecules remain adsorbed irreversibly at the gold interface and only the sorption of water molecules occurs. The study aims at engineering high effificiency pH-responsive biodiagnostics and drug delivery systems. 


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同位素分析仪-甲醛分析仪-北京世纪朝阳科技发展有限公司 同位素分析仪-甲醛分析仪-北京世纪朝阳科技发展有限公司
同位素分析仪-甲醛分析仪-北京世纪朝阳科技发展有限公司