Adsorption kinetics, orientation, and self-assembling of N-acetyl-L-cysteine on gold: A combined ATR-IR, PM-IRRAS, and QCM study

Article Abstract:

The adsorption of N-acetyl-L-cysteine from ethanol solution on gold is studied in situ attenuated total reflection infrared (ATR-IR) spectroscopy, polarization modulation infrared reflection absorption spectroscopy and a quartz crystal microbalance. Its is revealed that the amide group is tilted with respect to and points away from the surface whereas the carboxylic acid is in proximity to the surface, which is supported by a shift of the C-O-H bending mode.

Chemical reaction, Rate of, Chemical kinetics

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The quartz crystal microbalance as a tool for the study of a "Liquidlike Layer" at the ice/metal interface

Article Abstract:

The properties of a liquidlike layer (LLL) at the gold/frozen electrolyte interface are studied by using the quartz crystal microbalance (QCM). It was found that at temperatures well below the melting point of the electrolyte, in the range of -2 to -7 degree C, the QCM immersed in a frozen electrolyte shows detectable resonance, the parameters of which depends strongly on temperature.

Usage, Thermal properties, Surface chemistry, Electrolytes

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A novel approach for direct measurement of the thickness of the liquid-like layer at the ice/solid interface

Article Abstract:

A device allowing direct optical measurement of the displacement was used to measure the thickness of the liquid-like layer. The results were correlated with the calculations of the thickness based on admittance data of quartz crystal microbalance, measured at the same time.

Analysis, Chemistry, Physical and theoretical, Physical chemistry, Optical measurements, Optical measurement, Layer structure (Solids)

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