IR External Reflection Spectroscopy: A PROBE FOR CHEMICALLY MODIFIED SURFACES

Porter, Marc D.

doi:10.1021/ac00171a720

Cited by 105 publications

(47 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…RAIRS is routinely used in the area of chemically modifi ed surfaces, with a variety of surface systems in electrochemistry [14] , polymer research [2,15] , catalysis [1,8] , self -assembled monolayers [3,4,30,33] , and protein adsorption [4,16,31,32] having been investigated.…”

Section: Rairsmentioning

confidence: 99%

“…Here, the spectra obtained with incident light with s -and p -polarization are completely different for the three fi lms. Notably, in each spectrum the band shapes were dis-torted compared to conventional transmission experiments, which measure the material dispersed in a KBr matrix [2] . The observed absorbance maxima were approximately 10 cm − 1 higher in energy than the maximum of 1731 cm − 1 in conventional transmission experiments [2] .…”

Section: Rairsmentioning

confidence: 99%

“…Notably, in each spectrum the band shapes were dis-torted compared to conventional transmission experiments, which measure the material dispersed in a KBr matrix [2] . The observed absorbance maxima were approximately 10 cm − 1 higher in energy than the maximum of 1731 cm − 1 in conventional transmission experiments [2] . It was concluded that all band shape distortions had resulted from " optical effects, " which meant all effects had caused changes in the recorded spectrum, except those that had resulted from surface perturbations and changes in structure or chemical bonding.…”

Section: Rairsmentioning

confidence: 99%

See 2 more Smart Citations

Reflection Absorption IR Spectroscopy (RAIRS)

Hinrichs

2011

Surface and Thin Film Analysis

View full text Add to dashboard Cite

Refl ection absorption infrared spectroscopy ( RAIRS ) is a well -established vibrational spectroscopic method that is frequently applied within the research areas of chemistry, physics, and biology [1 -34] . The technique is used to identify and characterize the chemical state, molecular structure, anisotropy, and conductivity of thin fi lms adsorbed onto metallic and nonmetallic surfaces. Vibrational spectra are used as characteristic fi ngerprints for adsorbate molecules, adsorption confi gurations, and structures. The method is also referred to as different acronyms, including RAIRS, FT -IRAS, IRRAS, and ERIRS ( external refl ection infrared spectroscopy ), all of which refer to the same principle of measurement using IR radiation and a refl ection absorption geometry. Typically, this technique involves a single external refl ection at a sample covered substrate. The sample absorbs radiation at material specifi c frequencies of free carriers, electronic transitions, or vibrational bands, and a corresponding absorption occurs in the spectrum of the refl ected radiation. For this technique, substrates are chosen that do not produce disturbing absorption bands in the spectral range of interest. 23

show abstract

Section: Rairsmentioning

confidence: 99%

Section: Rairsmentioning

confidence: 99%

Section: Rairsmentioning

confidence: 99%

See 1 more Smart Citation

Reflection Absorption IR Spectroscopy (RAIRS)

Hinrichs

2011

Surface and Thin Film Analysis

View full text Add to dashboard Cite

show abstract

“…Thus, for thin films (thickness much less than the wavelength of the incident light), only vibrational modes having a transition dipole that is aligned with this electric field vector will be excited. This effect enables the determination of film orientation [173].…”

Section: Theorymentioning

confidence: 99%

Electron Transfer Reactivity Patterns at Chemically Modified Electrodes: Fundamentals and Application to the Optimization of Redox Recycling Amplification Systems

Bergren

2006

View full text Add to dashboard Cite

“…The FTIR-ERS measurements allow the study of changes in the IR signatures of sorption matrices and/or analyte molecules as the two interact. [8][9][10][11][12][13][14] A schematic diagram of the experimental setup for the surface infrared measurements is shown in Figure 1. FTIR-ERS of organic thin films confined to Au substrates are sensitive to both the polarization state and angle of incidence of the infrared radiation.8-14 Using the polarization state dependence, it is possible to distinguish between IR absorbances in the nearsurface region and those of molecules in the gas phase.…”

Section: Introductionmentioning

confidence: 99%

Reflectance Infrared Spectroscopy on Operating Surface Acoustic Wave Chemical Sensors during Exposure to Gas-Phase Analytes

Hierlemann¹,

Mj²,

Ricco³

et al. 1999

Anal. Chem.

View full text Add to dashboard Cite

We have developed instrumentation to enable the combination of surface acoustic wave (SAW) sensor measurements with direct, in-situ molecular spectroscopic measurements to understand the response of the SAW sensors with respect to the'interfacial chemistry of surface-confined sensing films interacting with gas-phase analytes. Specifically, the instrumentation and software was developed to perform in-situ Fourier-transform infrared external-reflectance spectroscopy (FTIR-ERS) on operating SAW devices during dosing of their chemically modified surfaces with analytes. By probing the surface with IR spectroscopy during gas exposure, it is possible to understand in unprecedented detail the interaction processes between the sorptive SAW coatings and the gaseous analyte molecules. In this report, we provide details of this measurement system, and also demonstrate the utility of these combined measurements by characterizing the SAW and FTIR-ERS responses of organic thin-film sensor coatings interacting with gas-phase analytes.

show abstract

IR External Reflection Spectroscopy: A PROBE FOR CHEMICALLY MODIFIED SURFACES

Cited by 105 publications

References 32 publications

Reflection Absorption IR Spectroscopy (RAIRS)

Reflection Absorption IR Spectroscopy (RAIRS)

Electron Transfer Reactivity Patterns at Chemically Modified Electrodes: Fundamentals and Application to the Optimization of Redox Recycling Amplification Systems

Reflectance Infrared Spectroscopy on Operating Surface Acoustic Wave Chemical Sensors during Exposure to Gas-Phase Analytes

Contact Info

Product

Resources

About