Investigation of Molecular Structures and Ordering at Solid Liquid Interfaces Using Novel Emersion Vibrational Spectroscopy PDF Download
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Author: Shinobu Tsuruta Heier
Publisher:
ISBN:
Category :
Languages : en
Pages : 1066
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Book Description
Molecular level understanding of solid-liquid interfaces in ambient condition is still a challenging, but exciting area. The work presented here demonstrates the effectiveness of emersion IRRAS as a new tool in our arsenal to expand our understanding of solid-liquid interfaces through the investigation of model solvent/organically modified interfaces and electrochemically relevant interfaces using novel emersion spectroscopy. The emersion approach effectively isolates the molecularly-thin emersed liquid layer under ambient conditions by physically removing bulk liquid from the interface. Without the interferences from bulk liquid, the emersed layer is accessible with conventional spectroscopic methods. In this work, development and implementation of emersion IRRAS is first described. Emersion IRRAS was used to investigate the model solvents water and methanol at three w-terminated-SAM-modified Ag surfaces (11-MUA, 11-MUD, and UDT-modified Ag) possessing a range of surface energies. These surfaces had been previously characterized with emersion Raman spectroscopy and/or ellipsometry. Furthermore, solvation of CO on Pt by three solvents (methanol, acetonitrile, and water) was investigated in an effort to attain molecular-level insight into electrochemically-relevant interfaces. Experimental results presented show successful implementation of emersion IRRAS. For each of the systems studied, interfacial solvent spectra clearly differed from those of bulk solvents indicating unique molecular structures of emersed liquids.
Author: Shinobu Tsuruta Heier
Publisher:
ISBN:
Category :
Languages : en
Pages : 1066
Get Book Here
Book Description
Molecular level understanding of solid-liquid interfaces in ambient condition is still a challenging, but exciting area. The work presented here demonstrates the effectiveness of emersion IRRAS as a new tool in our arsenal to expand our understanding of solid-liquid interfaces through the investigation of model solvent/organically modified interfaces and electrochemically relevant interfaces using novel emersion spectroscopy. The emersion approach effectively isolates the molecularly-thin emersed liquid layer under ambient conditions by physically removing bulk liquid from the interface. Without the interferences from bulk liquid, the emersed layer is accessible with conventional spectroscopic methods. In this work, development and implementation of emersion IRRAS is first described. Emersion IRRAS was used to investigate the model solvents water and methanol at three w-terminated-SAM-modified Ag surfaces (11-MUA, 11-MUD, and UDT-modified Ag) possessing a range of surface energies. These surfaces had been previously characterized with emersion Raman spectroscopy and/or ellipsometry. Furthermore, solvation of CO on Pt by three solvents (methanol, acetonitrile, and water) was investigated in an effort to attain molecular-level insight into electrochemically-relevant interfaces. Experimental results presented show successful implementation of emersion IRRAS. For each of the systems studied, interfacial solvent spectra clearly differed from those of bulk solvents indicating unique molecular structures of emersed liquids.
Author:
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 810
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Book Description
Author: Cathryn LeAn McFearin
Publisher:
ISBN:
Category : Liquid-liquid interfaces
Languages : en
Pages : 240
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: Andrzej Wieckowski
Publisher: John Wiley & Sons
ISBN: 1118658965
Category : Science
Languages : en
Pages : 396
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Book Description
Reviews the latest theory, techniques, and applications Surface vibrational spectroscopy techniques probe the structure and composition of interfaces at the molecular level. Their versatility, coupled with their non-destructive nature, enables in-situ measurements of operating devices and the monitoring of interface-controlled processes under reactive conditions. Vibrational Spectroscopy at Electrified Interfaces explores new and emerging applications of Raman, infrared, and non-linear optical spectroscopy for the study of charged interfaces. The book draws from hundreds of findings reported in the literature over the past decade. It features an internationally respected team of authors and editors, all experts in the field of vibrational spectroscopy at surfaces and interfaces. Content is divided into three parts: Part One, Nonlinear Vibrational Spectroscopy, explores properties of interfacial water, ions, and biomolecules at charged dielectric, metal oxide, and electronically conductive metal catalyst surfaces. In addition to offering plenty of practical examples, the chapters present the latest measurement and instrumental techniques. Part Two, Raman Spectroscopy, sets forth highly sensitive approaches for the detection of biomolecules at solid-liquid interfaces as well as the use of photon depolarization strategies to elucidate molecular orientation at surfaces. Part Three, IRRAS Spectroscopy (including PM-IRRAS), reports on wide-ranging systems from small fuel molecules at well-defined surfaces to macromolecular complexes that serve as the building blocks for functional interfaces in devices designed for chemical sensing and electric power generation. The Wiley Series on Electrocatalysis and Electrochemistry is dedicated to reviewing important advances in the field, exploring how these advances affect industry. The series defines what we currently know and can do with our knowledge of electrocatalysis and electrochemistry as well as forecasts where we can expect the field to be in the future.
Author: Luning Zhang
Publisher:
ISBN:
Category :
Languages : en
Pages : 248
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Book Description
Author: S. Bratos
Publisher: Springer
ISBN:
Category : Science
Languages : en
Pages : 488
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Book Description
This book has its or1g1n in a NATO Summer School organized from June 25 to July 7 1979, in Menton, France. The purpose of this School was a comparative study of the various aspects of vibra tional spectroscopy in molecular liquids and solids. This field has been rapidly expanding in the last decade; unfortunately, its development took place independently for liquids and for solids. In these circumstances, the comparison of the basic concepts and techniques used in these two branches of physics appeared as a necessity. The lectures given at the Menton Advanced Study Institute, as well as the exceptionally fruitful and lively discussions which followed them confirmed this point of view. The need of putting together these lectures, in the form of a monograph, clearly appeared during the ASI and the lecturers accepted to write down the material they presented at the Institute, improved thanks to the remarks of the participants. It is the result of this collective work which appears in the familiar Plenum Series.
Author: George Davidson
Publisher:
ISBN:
Category : Molecular structure
Languages : en
Pages : 0
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Book Description
Author:
Publisher: Elsevier
ISBN: 0323856705
Category : Science
Languages : en
Pages : 0
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Book Description
Encyclopedia of Solid-Liquid Interfaces is designed to provide a comprehensive overview of macroscopic phenomena at solid-liquid interfaces, e.g. in physics, chemistry, geology, biology and technology, and to describe the methodological approaches and strategies to gain microscopic insight into the underlying properties and processes on the atomic/molecular level. Covering an area of chemistry that plays a fundamental role in nature and technology, the book compiles all relevant features of the field into a ‘one-stop’ reference source that will be relevant to a wide range of interdisciplinary scientists, researchers and academics. Encompassing 170 chapters by renowned experts, and led by leading names in the field, the contents will be organized over 3 volumes. Provides information on solid Liquid Interfaces that no other resource covers Includes a comprehensive and interdisciplinary overview on current understanding of the ubiquitous phenomena at Solid-Liquid Interfaces in its full interdisciplinary breadth between physics, chemistry, biology and geology Ideal resource to use in teaching, research and development that requires inputs on solid-liquid interfaces Presents an up-to-date accounting of the experimental and theoretical research of solid-liquid interfaces at the atomic/molecular level as provided by expert authors
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
Work from our laboratory on vibrational sum frequency spectroscopic investigations of molecular ordering at the carbon tetrachloride-water interface is reviewed. Simple charged surfactants adsorbed at the liquid-liquid interface are seen to induce alignment of interfacial water molecules to a degree which is dependent on the induced surface potential. Saturation of water molecule alignment occurs at a surfactant surface concentration corresponding to a calculated surface potential of approximately 160 mV. In complementary studies, the relative degree of hydrocarbon chain ordering within monolayers of symmetric phosphatidylcholines of different chain lengths is inferred by the relative signal contributions of the methyl and methylene symmetric stretch modes. The degree of hydrocarbon chain disorder observed depends strongly on the method of monolayer preparation. By one method, a decrease in hydrocarbon chain order is seen with increasing chain length. Another method of monolayer formation yielded very well ordered hydrocarbon chains for the longest chain phosphatidylcholine studied, and showed much greater disorder in shorter chain species which was comparable to the other preparation method. These studies are a foundation for further work with this technique geared towards understanding molecular-level structural features in membrane-like assemblies and surface biochemical interactions of relevance to biomedical research.
