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Sum frequency generation from Langmuir-Blodgett multilayer films on metal and dielectric substrates

Article Abstract:

Sum frequency generation (SFG) vibrational spectra of cadmium arachidate multilayer films adsorbed on a substrate with high nonresonant susceptibility on a low nonresonant susceptibility substrate are investigated. The films were formed by Langmuir-Blodgett deposition and their spectra recorded using SFG spectrometers employing both 532-nm nanosecond and 800-nm femtosecond lasers, with counter-propagating beam geometries respectively.

Usage, Optical properties, Thin films, Multilayered, Multilayered thin films, Dielectrics, Dielectric materials, Spectrometers, Spectrometer, Acoustic properties

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Sum frequency vibrational spectroscopy of the comb copolymer cetyl dimethicone copolyol

Article Abstract:

The sum frequency vibrational spectrum in the C-H stretching region of a comb copolymer, cetyl dimethicone copolyol (CDC), consisting of a poly(dimethylsiloxane) backbone and grafted poly(ethyleneoxide) are recorded after deposition on a gold-coated substrate. The SF resonance attributes to the methyl groups of the polymer backbone and the cetyl side chains of polymer are observed.

Methods, Adsorption, Methyl groups, Methyl compounds

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Interference effects in sum frequency vibrational spectra of thin polymer films: An experimental and modeling investigation

Article Abstract:

The phase behavior of the r(super -1) methyl resonance is successfully modeled by the extension of a previously developed interference theory to include multiple reflections and a resonant contribution from the polymer/gold interface.

Science & research, Research, Vibrational spectra

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