Enhanced sensitivity in single-reflection spectroscopy of organic monolayers on metal substrates (Pseudo-ATR)

Article Abstract:

Intensity of an infrared spectrum of a thin film or monolayer on a metal substrate can be increased an order of magnitude by using attenuated total reflection (ATR) instrumentation with a single reflection (pseudo-ATR). The results reveal that pseudo-ATR is a highly sensitive technique for analyzing monolayers and very thin films on metal substrates and yields higher signal-to-noise ratios for IR peaks than ordinary grazing angle specular reflectance.

Analysis, Reflectance spectroscopy, Atomic properties

---

Vibronic spectroscopy of single C(sub 60) molecules and monolayers with the STM

Article Abstract:

A scanning tunneling microscope is used to study the differential conductance (dI/dV) of single C(sub 60) molecules in isolation and in monolayers adsorbed on NiAl(110) and on ultrathin alumina film grown on the Ni-Al-(110) surface. On the oxide layer, the electronic bands in the dI/dV spectra display a series features, attributed to the vibronic states of the molecules, which are absent when the molecules are adsorbed on the metal.

Scanning tunneling microscopy, Carbon compounds, Chemical properties

---

Inter- and intramolecular temperature-dependent vibrational perturbations of alkanethiol self-assembled monolayers

Article Abstract:

The spectral positions and intensities of the h33-C16 components of the self-assembled monolayers (SAM) are shown to provide evidence of inter- and intramolecular couplings. It is suggested that the highly constrained geometry of the isotropically diluted monolayers may provide an environment that is less sensitive to intramolecular couplings with low-frequency modes than that of urea-clathrate-isolated species.

Perturbation (Astronomy), Perturbations (Astrophysics)

Similar abstracts:

• Abstracts: Sum frequency generation from Langmuir-Blodgett multilayer films on metal and dielectric substrates. Sum frequency vibrational spectroscopy of the comb copolymer cetyl dimethicone copolyol
• Abstracts: Characteristic features of hydroxystearic acid monolayers at the air/water interface. Equation of state for monolayers under consideration of the two-dimensional compressibility in the condensed state
• Abstracts: Dispersion of pristine single-walled carbon nanotubes in water by a thiolated organosilane: Application in supramolecular nanoassemblies
• Abstracts: Strain and microcrystallite size in synthetic lamellar apatite. Temperature effects on a hydroxyapatite precursor solution
• Abstracts: Thermodynamic calculations in the system CH(sub 4)-H(sub 2)O and methane hydrate phase equilibria. The role of water in gas hydrate dissociation

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.