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Showing 1 to 10 of 10 for “"sum frequency generation (SFG)"”.
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A Study of Molecular Orientation at Neat Liquid-Mica Interface by Sum Frequency Generation (SFG) Spectroscopy
… of studying the interfacial structures, sum frequency generation vibrational spectroscopy shows advantageous to study the solid-liquid interface due to its unique ability in yielding vibrational spectra at such interfaces. Muscovite mica is an important substrate to investigate the ionic …
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Spectroscopic Study of Compressible Mobile Phase and Stationary Phase Behavior in Chromatography
… spectroscopy, laser-induced fluorescence, and sum-frequency generation (SFG) spectroscopy are used to investigate the behavior of compressible mobile phases and stationary phases under a variety of chromatographic conditions. Efforts to understand and optimize separations employing compressible …
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Structural Characterization of Thin Films of Molecules on Solid Surfaces: Development of a Portable UHV Chamber to Bridge RHEED and SFG Spectroscopy Techniques
… high-energy electron diffraction (RHEED) and sum-frequency generation (SFG) spectroscopy techniques, which include thin films of ionic liquids (ILs) deposited by physical vapor deposition and self-assembled monolayers on gold. A thickness-dependent structural transition of ILs on …
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Shock compression and flash-heating of molecular adsorbates on the picosecond time scale
… termed broadband multiplex vibrational sum-frequency generation (SFG) with nonresonant suppression was employed to monitor vibrational transitions of molecular adsorbates on metallic substrates during laser-driven shock compression and flash-heating. Adsorbates were in the form of …
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Sum Frequency Generation Spectroscopy of Imidazolium-based Ionic Liquids with Cyano-functionalized Anions at Gas-Liquid and Solid-Liquid Interfaces
… The inherently surface-sensitive technique, sum frequency generation (SFG) spectroscopy, in combination with bulk-sensitive vibrational spectroscopic techniques such as FTIR and Raman, have been used in this report to characterize the surface of cyano-containing ILs, such as [BMIM][SCN], …
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Using Vibrational Laser Spectroscopy to Study Biologically Relevant Interfaces
… microscopy - infrared (AFM-IR) spectroscopy and sum-frequency generation (SFG) spectroscopy are explored in detail for their innate ability to unravel the complexities of biological interfaces. The benefits of both techniques are demonstrated through applications to a variety of different …
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Optische Dreiwellenspektroskopie an GaAs(001), Si(111) und Pt-Elektrolyt-Grenzflächen
… of GaAs has been determined by second-harmonic generation (SHG) for two-photon energies between 2 eV and 5 eV. In this range the frequency dependence of |æxyz| is shown to be dominated by the E_1, E_1+Delta_1and E_0' and E_2 critical-point-transitions of GaAs. At the E_1 transition ( 2.91 eV) …
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Aufbau eines 500 Hz-Lasersystems zur Summenfrequenzschwingungsspektroskopie
… laser system specifically developed for sum-frequency spectroscopy of molecular vibrations at interfaces, and on its applications to the study of potential-dependent CO adsorption at the Pt(111)/aqueous electrolyte interface. The experimental setup consists of a picosecond Nd:YAG laser …
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Spectroelectrochemical investigation of passive layers formed on electrode surfaces
… absorption spectroscopy (PM-IRRAS), and sum frequency generation (SFG). It is a good test for the viability of shell-isolated nanoparticle enhanced Raman (SHINERS) particles in investigating surface film formation on single crystal Cu. SHINERS did not reproduce the face dependent behavior …
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In-situ spectroelectrochemical surface studies of fundamental fuel cell catalysis
Electrochemical analysis and broadband sum frequency generation (BB-SFG) vibrational spectroscopy have been applied to a variety of fuel cell relevant systems. Primarily, ethanol oxidation was studied due to the potential of ethanol as an easily-transported and manufactured fuel with a higher …