IRRAS, IRAS

IRAS = IRRAS infrared reflection-absorption spectroscopy 3.7c.i... 

Recently an attempt has been made to eliminate the contradiction appearing between electrochemical and IRRAS data ° ° suggesting the presence of an adsorbed CO which cannot be detected by means of IRAS. This species is denoted as IRAS-inactive CO. However, at the present time not much information is available concerning the reality of this IRAS-inactive CO. ... 

This technique is used to study thin (down to submonolayer) films adsorbed on reflective substrates such as metals. Experimentally it involves measuring the change in the reflectance spectrum of the substrate that accompanies thin film formation. Various acronyms for the technique are used infrared reflection—absorption spectroscopy (IRRAS, IRAS) and reflection—absorption infrared spectroscopy (RAIRS). The Basics of IRRAS spectra are described in Chapter 5.2. 

Acronyms IRRAS, IRAS (infrared reflection-absorption spectroscopy)... 

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)... 

The technique of infrared reflection absorption spectroscopy (IRAS) was first described both theoretically and experimentally in the late fifties by Francis and Ellison [10]. They used the technique for structural characterization of Langmuir Blodgett films of metal stearates on highly reflecting metal substrates. It is worth noting that IRAS is sometimes called IRRAS or RAIRS. The technique is briefly described in the following, a detailed theoretical treatment can be found elsewhere [10, 11]. 

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