Journal ArticleDOI
Mapping molecular orientation and conformation at interfaces by surface nonlinear optics
Xiaowei Zhuang,Xiaowei Zhuang,Paulo B. Miranda,Paulo B. Miranda,Doseok Kim,Doseok Kim,Y. R. Shen,Y. R. Shen +7 more
TLDR
Second-order nonlinear optics can be used to quantitatively determine the orientation of chemical bonds or submoieties of a fairly complicated molecule at an interface, and therefore completely map out its orientation and conformation as mentioned in this paper.Abstract:
Second-order nonlinear optics can be used to quantitatively determine the orientation of chemical bonds or submoieties of a fairly complicated molecule at an interface, and therefore completely map out its orientation and conformation. As a specific example, we have studied pentyl-cyanoterphenyl molecules at the air-water interface. We have measured the orientation of all three parts of the molecule (cyano head group, terphenyl ring, and pentyl chain) by optical second-harmonic generation and infrared-visible sum-frequency generation. A quantitatively consistent picture of the molecular configuration has been obtained. The technique can be applied to situations where other methods would fail (e.g., the surface of neat liquids or buried interfaces).read more
Citations
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Molecular bonding and interactions at aqueous surfaces as probed by vibrational sum frequency spectroscopy.
TL;DR: Her research group uses a combination of linear and nonlinear optical methods, thermodynamic measurements, and theory to characterize interactions at aqueous surfaces, metal and semiconductor surfaces in contact with liquids and adsorbates, and liquid/liquid interfaces.
Journal ArticleDOI
Implementing the Theory of Sum Frequency Generation Vibrational Spectroscopy: A Tutorial Review
TL;DR: Sum frequency generation vibrational spectroscopy (SFS) as discussed by the authors is a nonlinear optical technique which provides vibrational spectrum of molecules solely at interfaces, which can be analyzed to provide the polar orientation, molecular conformation, and average tilt angle of the adsorbate to the surface normal.
Journal ArticleDOI
Quantitative spectral and orientational analysis in surface sum frequency generation vibrational spectroscopy (SFG-VS)
TL;DR: In this article, the authors make assessments of the limitations, issues and techniques as well as methodologies in quantitative orientational and spectral analysis with sum frequency generation vibrational spectroscopy (SFG-VS).
Journal ArticleDOI
Chemistry of Hofmeister anions and osmolytes.
Yanjie Zhang,Paul S. Cremer +1 more
TL;DR: A mechanism for specific ion effects is elucidated for aqueous systems containing charged and uncharged polymers, polypeptides, and proteins and a hydrogen-bonding mechanism is tested for the urea denaturation of proteins with some of these same systems.
Journal ArticleDOI
Studies of polymer surfaces by sum frequency generation vibrational spectroscopy
TL;DR: SFG probing of polymer surfaces provides valuable insights into the relations between polymer surface structures and surface properties, which will assist in the design of polymer materials with desired surface properties.
References
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TL;DR: The present edition of this now classic text offers substantial refinements and improvements over the first edition and includes some new material as mentioned in this paper, including an improved derivation of the macroscopic equations, monopoles, causality and dispersion relations, signal propagation in a dispersive media.
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Surface science: The first thirty years
TL;DR: A collection of short (less than ten pages) articles describing the historical development in the years 1964-92 of selected topics in surface science providing an overview of the field, and indicating its future direction is presented in this article.