Multiple-internal-reflection spectroscopy

Figure 3.1. Showing geometries for (a) RAIRS (IRAS), where 80° < 0 < 89° and (b) Multiple Internal Reflection spectroscopy (MIR), where 0 > 0criticai-...

Multiple Internal Reflection Spectroscopy (MIR) is an alternative approach in which the IR beam is passed through a thin, IR transmitting sample such that it undergoes total internal reflection alternately from the front and rear faces of the sample (Figure 3.1(b)). At each reflection, some of the IT radiation may be absorbed by species adsorbed on the solid surface. 

Pesticides by Fmstrated Multiple Internal Reflectance Spectroscopy, Appl. Spectry. (1965) 19, 10-14... 

FMIR Frustrated multiple internal reflectance (spectroscopy)... 

Hydrophobic and hydrophilic bonded silicon wafers were studied by the methods of multiple internal reflection spectroscopy (MIR) and multiple internal transmission spectroscopy (MIT) [79, 81, 83, 84]. The sensitivity of the MIT configmation is 20-40 times higher than that of the traditional MIR configuration [81]. However, both of these techniques require beveled Si wafers. 

Diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) Reflection-absorption infrared spectroscopy (RAIRS) (also known as infrared reflection absorption spectroscopy, IRAS or IRRAS) Multiple Internal reflection spectroscopy (MIR)... 

Electromoduiated Infrared Spectroscopy. The form most widely in use is the electromoduiated attenuated-total-reflection-spectroscopy. This is the electromoduiated form of the multiple internal reflection spectroscopy that was previously discussed. The practice here is to modulate, by switching the potential between two values, and monitor the absorption changes by lock-in techniques. Description of this technique with an emphasis on metal-electrolyte interfaces can be found in (70). The modulation here is different from all the other techniques that were mentioned in the sense that the modulation is not a small perturbation of an equilibrium state but a shift between two equilibrium states. Whether... 

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