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Total internal reflection ellipsometry in the investigation of phenomena at surfaces and interfaces for biosensing

机译:全内反射椭圆仪用于研究生物传感表面和界面处的现象

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Ellipsometry, particularly spectroscopic ellipsometry, is a very sensitive, nondestructive experimental technique of thin film characterisation. The recently proposed method of Total internal reflection ellipsometry (TIRE) combines the advantages of spectroscopic ellipsometry and the Kretschmann type SPR geometry of total internal reflection. The modeling reveals detection limit of changes in the bulk refractive index, Δn= 1.5×10 which represents the instrumental potential for detecting an analyte at several pmol/liter in a solution. These results were proven by experimental studies on monitoring changes in adsorbed layers (at the metal / dielectric interface) caused by specific binding of biomolecules from the surrounding solution.
机译:椭圆偏振法,特别是光谱椭圆偏振法,是一种非常灵敏,无损的薄膜表征实验技术。最近提出的全内反射椭圆仪(TIRE)方法结合了光谱椭圆仪的优点和全内反射的Kretschmann型SPR几何形状。该模型揭示了总折射率变化的检测极限,Δn= 1.5×10,代表了检测溶液中数pmol / l的分析物的仪器潜力。这些结果已通过实验研究证明,该研究监测了生物分子与周围溶液的特异性结合所引起的吸附层(在金属/介电界面处)的变化。

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