Surface-enhanced infrared spectroscopy of monolayers

Johnson, Eric; Aroca, R.

doi:10.1021/j100023a004

Cited by 88 publications

(65 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hence, the experimentally observable curve of intensity versus d mol should be the sum of the solid curve and the dashed line. The simulation is in good agreement with several experiments [10,22,23,24,25].…”

Section: Electromagnetic Mechanismsupporting

confidence: 88%

See 1 more Smart Citation

Surface-Enhanced Infrared Absorption

Osawa

Topics in Applied Physics

355

283

View full text Add to dashboard Cite

Abstract. Molecules adsorbed on metal island films or particles exhibit 10-1000 times more intense infrared absorption than would be expected from conventional measurements without the metal. This effect is referred to as surface-enhanced infrared absorption (SEIRA) to emphasize the similarities with surface-enhanced Raman scattering (SERS). The electromagnetic interactions of the incident photon field with the metal and molecules play predominant roles in this effect. The chemical interactions of the molecules with the surface can give additional enhancement. The enhancement mechanisms and some applications of SEIRA.

show abstract

Section: Electromagnetic Mechanismsupporting

confidence: 88%

“…The enhancement is significant for the first monolayer directly attached to the surface and decays sharply within about 5 nm from the surface [10,22,23,24,25]. 5.…”

Section: Introductionmentioning

confidence: 99%

Surface-Enhanced Infrared Absorption

Osawa

Topics in Applied Physics

355

283

View full text Add to dashboard Cite

show abstract

“…36,37,41 Also in terms of the peak size, the data presented here agree with previously reported values for different ML sample systems. 36,[42][43][44] Note that the peak absorbance of ML samples at metal surfaces is likely to be influenced by local field surface-enhancement effects, 42,[45][46][47] which will contribute to the 2D ATR IR spectroscopy as well, an effect that is currently under investigation and will be published as a separate account.…”

Section: Resultsmentioning

confidence: 99%

2D attenuated total reflectance infrared spectroscopy reveals ultrafast vibrational dynamics of organic monolayers at metal-liquid interfaces

Kraack

Lotti

Hamm

2015

The Journal of Chemical Physics

101

View full text Add to dashboard Cite

We present two-dimensional infrared (2D IR) spectra of organic monolayers immobilized on thin metallic films at the solid liquid interface. The experiments are acquired under Attenuated Total Reflectance (ATR) conditions which allow a surface-sensitive measurement of spectral diffusion, sample inhomogeneity, and vibrational relaxation of the monolayers. Terminal azide functional groups are used as local probes of the environment and structural dynamics of the samples. Specifically, we investigate the influence of different alkyl chain-lengths on the ultrafast dynamics of the monolayer, revealing a smaller initial inhomogeneity and faster spectral diffusion with increasing chain-length. Furthermore, by varying the environment (i.e., in different solvents or as bare sample), we conclude that the most significant contribution to spectral diffusion stems from intra-and intermolecular dynamics within the monolayer. The obtained results demonstrate that 2D ATR IR spectroscopy is a versatile tool for measuring interfacial dynamics of adsorbed molecules. We present two-dimensional infrared (2D IR) spectra of organic monolayers immobilized on thin metallic films at the solid liquid interface. The experiments are acquired under Attenuated Total Reflectance (ATR) conditions which allow a surface-sensitive measurement of spectral diffusion, sample inhomogeneity, and vibrational relaxation of the monolayers. Terminal azide functional groups are used as local probes of the environment and structural dynamics of the samples. Specifically, we investigate the influence of different alkyl chain-lengths on the ultrafast dynamics of the monolayer, revealing a smaller initial inhomogeneity and faster spectral diffusion with increasing chain-length. Furthermore, by varying the environment (i.e., in different solvents or as bare sample), we conclude that the most significant contribution to spectral diffusion stems from intra-and intermolecular dynamics within the monolayer. The obtained results demonstrate that 2D ATR IR spectroscopy is a versatile tool for measuring interfacial dynamics of adsorbed molecules. C 2015 AIP Publishing LLC. [http://dx

show abstract

“…SEIRRAS has been used for the characterization of 4-pyridinethiol [331] and mercaptoundecanoic acid [331] SAMs, Langmuir±Blodgett films, [320] the absorption of water on titanium dioxide thin films, [329] and the adsorption of such simple molecules as p-nitrophenol, [321,322,333] pyrazine, [332] iron carbonyl, [323] stearic acid, [324] p-nitrobenzoic acid, [272,327] and fumaric acid. [328] In has also been employed for spectroelectrochemistry, in particular for examining the potential-dependent reorientation of water molecules, [334] potential modulation, [117,334,335] and electron transfer.…”

Section: Applications Of Seirras For the Characterization Of Nanomatementioning

confidence: 99%

Reflection and Absorption Techniques for Optical Characterization of Chemically Assembled Nanomaterials

Roy

Fendler²

2004

Advanced Materials

123

122

View full text Add to dashboard Cite

This review discusses recent developments in the areas of fabrication, certain types of optical characterization, and applications of a selected class of chemically assembled nanomaterials, namely i) gold and silver nanoparticles deposited onto optically transparent glass substrates; ii) thiol‐functionalized self‐assembled monolayers (SAMs); iii) chemically stabilized gold and silver nanoparticles (monolayer protected clusters, MPCs); and iv) MPCs linked to metallic substrates and adsorbates. Six linear optical techniques for the characterization of these materials are discussed: transmission localized surface plasmon resonance spectroscopy, T‐LSPR; propagating surface plasmon resonance spectroscopy, P‐SPR; polarization‐selective Fourier transform infrared reflection absorption spectroscopy, PS‐FTIRRAS; polarization‐modulation Fourier transform infrared reflection absorption spectroscopy, PM‐FTIRRAS; surface‐enhanced infrared reflection absorption spectroscopy, SEIRRAS; and infrared ellipsometry. The review focuses particularly on providing a unified treatment of these six optical techniques by using a relatively simple stratified multilayer model.

show abstract

Surface-enhanced infrared spectroscopy of monolayers

Cited by 88 publications

References 3 publications

Surface-Enhanced Infrared Absorption

Surface-Enhanced Infrared Absorption

2D attenuated total reflectance infrared spectroscopy reveals ultrafast vibrational dynamics of organic monolayers at metal-liquid interfaces

Reflection and Absorption Techniques for Optical Characterization of Chemically Assembled Nanomaterials

Contact Info

Product

Resources

About