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Showing 1 to 12 of 12 for “"sum-frequency generation spectroscopy"”.
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Interrogating the Electrochemical Interface Using Sum Frequency Generation Spectroscopy
SFG in tandem with electrochemical capacitance and CV measurements are used to study the effects of applied potential on the adsorption and orientation of PABA at a Ag(111) surface. The data indicates that PABA changes orientation in response to the charge on the electrode surface, orienting one …
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Investigation of chiral porphyrin aggregates with heterodyne-detected vibrational sum frequency generation spectroscopy
… studies. Heterodyne-detected vibrational sum frequency generation (HD-VSFG) spectroscopy is a phase-sensitive, second-order nonlinear technique which probes the vibrational characteristics of noncentrosymmetric molecular environments. HD-VSFG experiments can also probe excitonic and …
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Structural and kinetic studies of surfactant and phospholipid monolayers at the air/liquid interface using sum-frequency generation spectroscopy
In this work, the non-linear optical technique of sum-frequency spectroscopy (SFG) has been used to investigate a variety of surfactant and phospholipid systems at different interfaces. Firstly, the effects of temperature and ionic strength on the adsorption of cationic and non-ionic surfactants …
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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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Design of reversible "smart" surfaces for biomedical and nanotechnological applications
… Monolayers & Surface Characterization A brief summary of the formation, structure, and characterization techniques of self assembled monolayers (SAMs) is described. The characterization techniques include contact angle goniometry, ellipsometry, grazing-angle Fourier-transform infrared …
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Investigation of the ultrafast fiber and hybrid laser systems and their nonlinear wavelength conversion methods in the infrared spectral region /
… are desirable for nonlinear microscopy and sum-frequency generation spectroscopy. The main goal of this thesis was to create and improve the technologies and methods required for the development of effective and reliable laser sources operating in these spectral regions. The thesis consists …
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Three dimensional vibrational spectroscopy and shock initiation of hmx
3D spectroscopy was employed to probe and visualize energy flows through molecules from excited parent states. Studies with IR-Raman pump probe spectroscopy show clearly that the characteristics of the vibrational relaxation pathway depend strongly upon the initial excited states. By employing 3D …
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Innovative Deposition of Corrosion Inhibitors by Abrasive Blasting
… for the inhibitor. X-ray photoelectron spectroscopy, sum-frequency generation spectroscopy, and quartz crystal microbalance measurements supported the solution depletion conclusions: for low bulk concentrations, BTAH preferentially adsorbs onto steel, even in the presence of other …
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Electrochemical and spectroscopic interfacial investigations of small organic molecule electrooxidation on platinum electrodes
… with electrochemical techniques and broad-band sum frequency generation spectroscopy (BB-SFG). In situ BB-SFG allows for the chemical analysis of electrode surfaces to examine details of surface electrochemical reactions. SFG is based on a second order nonlinear optical process that is forbidden …
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Shock compression and flash-heating of molecular adsorbates on the picosecond time scale
An ultrafast nonlinear coherent laser spectroscopy 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 …
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Spectroscopic Study of Compressible Mobile Phase and Stationary Phase Behavior in Chromatography
Raman 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 …