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Preparation And Characterization Of Alkanethiolate Self Assembled Monolayers Onto Gold From Environmentally Benign Solvents
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Book Synopsis Preparation and Characterization of Alkanethiolate Self-assembled Monolayers Onto Gold from Environmentally Benign Solvents by : Dong Yan
Download or read book Preparation and Characterization of Alkanethiolate Self-assembled Monolayers Onto Gold from Environmentally Benign Solvents written by Dong Yan and published by . This book was released on 2002 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2002 with total page 756 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis and Characterization of Self-assembled Monolayers on Gold Generated from Chelating Alkanethiols by : Joon-Seo Park
Download or read book Synthesis and Characterization of Self-assembled Monolayers on Gold Generated from Chelating Alkanethiols written by Joon-Seo Park and published by . This book was released on 2004 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Self-assembled Monolayers of Receptor Adsorbates on Gold by : Eggo Ulphard Thoden van Velzen
Download or read book Self-assembled Monolayers of Receptor Adsorbates on Gold written by Eggo Ulphard Thoden van Velzen and published by . This book was released on 1994 with total page 197 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Preparation and Electrochemical Characterization of Ferrocene-containing Monolayers on Gold by : Gary Kenneth Rowe
Download or read book Preparation and Electrochemical Characterization of Ferrocene-containing Monolayers on Gold written by Gary Kenneth Rowe and published by . This book was released on 1993 with total page 804 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Multidentate Alkanethiols with Cyclohexyl and Pyridyl Frameworks Forming Self-assembled Monolayers on Gold by : Burapol Singhana
Download or read book Multidentate Alkanethiols with Cyclohexyl and Pyridyl Frameworks Forming Self-assembled Monolayers on Gold written by Burapol Singhana and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Self-assembled monolayers (SAMs) generated from adsorption of the tridentate adsorbate having a cyclohexane ring as a platform were studied. The first generation of these SAMs was derived form cyclohexane-cis,cis-1,3,5-triyltrimethanethiol (CyTSH) and (cis,cis-1,3,5-trimethylcyclohexane-1,3,5-triyl)trimethanethiol (3C1CyTSH). Thin films prepared by the adsorption of these molecules onto the surface of gold were characterized by ellipsometry, contact angle goniometry, polarization modulation infrared reflection absorption spectroscopy (PM-IRRAS), and X-ray photoelectron spectroscopy (XPS). CyTSH was found to generate multilayer thin films with many unbound thiol species and oxidized sulfur moieties (e.g., disulfides and sulfone). In contrast, 3C1CyTSH was found to generate monolayer films in which ~90% of the thiols were bound to the surface of gold (~10% unbound), and there were no oxidized sulfur species. In comparing CyTSH and 3C1CyTSH, the methyl groups of 3C1CyTSH impart rigidity to the structure, which significantly enhances the chemisorption of sulfur to the surface of gold. Ellipsometric measurements and analysis by XPS indicate that the thickness of the SAM formed from 3C1CyTSH is ~5 Å. The second generation of these SAMs generated from the analogs of the R3C6H6(CH2SH)3 (abbreviated as 3CnCyTSH) where R = -(CH2)nH and n = 1, 3, 8 and 13 were also examined. Characterization of the SAMs revealed that all sulfur atoms of these tridentane adsorbates are bound to the surface of gold and generated loosely packed monolayer thin films with lower packing densities of the alkyl chains than a normal alkanethiolate SAM (C18SH). The trends in packing density and conformational order for these SAMs decreased as follows: C18SH ” 3C13CyTSH > 3C8CyTSH > 3C3CyTSH. A preliminary study of the thermal stability of this series of SAMs by XPS measurements has shown that the tridentate adsorbates (3CnCyTSH) are more stable than the normal alkanethiolate SAM (C18SH), a characteristic that is attributable to the chelating effect. Finally, a new pyridyl-based adsorbate (C18OPDSH) was synthesized and used to form SAMs. This SAM was characterized and the data was compared to those generated from the normal alkanethiol C18SH and C18OBDSH. XPS spectra display that a lone electron pair of pyridyl nitrogen atom of C18OPDSH interacts weakly with gold surface with some unbound thiols on the film. Both C18OPDSH and C18OBDSH adsorbates generate loosely and disordered packed thin films when compared to a normal alkanethiol (C18SH). The evaluation of the thermal stability using XPS measurement indicates that the C18OPDSH SAM is more stable when compared to both C18OBDSH and C18SH SAMs.
Book Synopsis Self-Assembled Monolayers on Gold Substrates by : Mihaela Georgeta Badin
Download or read book Self-Assembled Monolayers on Gold Substrates written by Mihaela Georgeta Badin and published by VDM Publishing. This book was released on 2008 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: Self-assembled monolayers (SAMs) consist of densely packed long-chain organic molecules, which are chemisorbed on metal substrates through a sulfur head group. The purpose of this work, is to study the arrangement and structure of SAMs by IR, XPS, NEXAFS, STM, Ellipsometry and contact angle. While the first group of triptycenethiols and the second group of triarylaminethiols show a formation of disordered films on the gold surface, the third group of alkanethioacetates shows the formation of highly ordered monolayers. A further adsorption to upright oriented molecules is hindered due to kinetic effects. In the case of azo-molecules it is shown that the photoisomerization process is not reversible. These molecules are not able to form highly ordered monolayers on the gold surface due to the critical effect of azo-moiety.
Book Synopsis Synthesis and Characterization of Self-assembled Monolayers on Gold Generated from Partially Fluorinated Alkanethiols and Aliphatic Dithiocarboxylic Acids by : Ramon Colorado
Download or read book Synthesis and Characterization of Self-assembled Monolayers on Gold Generated from Partially Fluorinated Alkanethiols and Aliphatic Dithiocarboxylic Acids written by Ramon Colorado and published by . This book was released on 2002 with total page 522 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis and Characterization of Specifically Fluorinated and Structurally Tailored Self-assembled Monolayers on Gold by : David Barriet
Download or read book Synthesis and Characterization of Specifically Fluorinated and Structurally Tailored Self-assembled Monolayers on Gold written by David Barriet and published by . This book was released on 2005 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Environmentally Friendly and Biobased Lubricants by : Brajendra K. Sharma
Download or read book Environmentally Friendly and Biobased Lubricants written by Brajendra K. Sharma and published by CRC Press. This book was released on 2016-09-19 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt: A Comprehensive Review of Developing Environmentally Friendly Lubricants A push from environmentally savvy consumers along with recent changes in governmental regulations have paved the way for a marketplace of products with high levels of environmental performance. Fueled by the growing demand for biobased lubricants, Environmentally Friendly and Biobased Lubricants highlights the development of environmentally friendly additives that are compatible with environmental regulations and describes the approaches being used in this emerging area. Derived from research topics shared over the years at various technical sessions of the Society of Tribologists and Lubrication Engineers (STLE) Annual Meetings, the book includes a critical assessment of gaps and weaknesses in the field of environmentally friendly fluids and biobased lubricants. Each chapter is written by authors selected from the environmentally friendly fluids and biobased lubricants sessions of STLE and also incorporates input from prominent researchers invited to take part in the book. Expert contributors discuss the control, production, usage, and disposal of lubricants; factor in related policies, laws, and regulations around the world; and include case studies demonstrating the uses and values of commercially viable biobased lubricants. The book is divided into five sections that cover advanced environmentally friendly base oils and feedstocks, biobased hydraulic lubricants and biodegradability, chemically/enzymatically modified environmentally friendly base oils, vegetable oil–based environmentally friendly fluids, and additives for environmentally friendly fluids.
Book Synopsis Molecular Dynamics Study of Alkanethiolate Self-Assembled Monolayer Coated Gold Nanoparticle by :
Download or read book Molecular Dynamics Study of Alkanethiolate Self-Assembled Monolayer Coated Gold Nanoparticle written by and published by . This book was released on 2007 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: Through molecular simulations we have observed that the surface of gold nanoparticles become highly corrugated by the adsorption of alkanethiolate self assembled monolayers (SAMs). Furthermore, as the temperature is increased, the SAMs dissolve into the gold nanoparticle, creating a liquid mixture at temperatures much lower than the melting temperature of the gold nanoparticle. By analyzing the mechanical and chemical properties of gold nanoparticles at temperatures below the melting point of gold, with different SAM chain lengths and surface coverage properties, we have determined that the system is metastable. The model and computational results that provide support for this hypothesis are presented in this paper.
Book Synopsis American Doctoral Dissertations by :
Download or read book American Doctoral Dissertations written by and published by . This book was released on 2001 with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Self-Assembled Monolayers of Alkanethiols on Gold: Monolayers Derived From Two Components with Alkane Chains of Different Lengths by :
Download or read book Self-Assembled Monolayers of Alkanethiols on Gold: Monolayers Derived From Two Components with Alkane Chains of Different Lengths written by and published by . This book was released on 1992 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper describes the preparation and wetting properties of two-component self-assembled monolayers (SAMs) obtained by the competitive adsorption of one short-chain (HS(CH2)1OSh) and one long-chain (HS(CH2)21LG) alkanethiol onto gold from dilute ethanolic solutions. The four possible combinations of the tail groups CH3 and CH20H were investigated: Sh = CH3/Lg = CH20H, Sh = CH2OH/Lg = CH3, SH = CH2OH/Lg = CH2OH, and Sh = CH3/Lg = CH3. The compositions of these SAMs are not the same as the compositions of the solutions from which they were formed, and the relationship between these compositions suggests that the SAMs have partially phase separated. Contact angles with water and hexadecane, however, show that significant disorder still remains in the interfacial region.
Book Synopsis Organic Field-Effect Transistors by : Zhenan Bao
Download or read book Organic Field-Effect Transistors written by Zhenan Bao and published by CRC Press. This book was released on 2018-10-03 with total page 578 pages. Available in PDF, EPUB and Kindle. Book excerpt: The remarkable development of organic thin film transistors (OTFTs) has led to their emerging use in active matrix flat-panel displays, radio frequency identification cards, and sensors. Exploring one class of OTFTs, Organic Field-Effect Transistors provides a comprehensive, multidisciplinary survey of the present theory, charge transport studies, synthetic methodology, materials characterization, and current applications of organic field-effect transistors (OFETs). Covering various aspects of OFETs, the book begins with a theoretical description of charge transport in organic semiconductors at the molecular level. It then discusses the current understanding of charge transport in single-crystal devices, small molecules and oligomers, conjugated polymer devices, and charge injection issues in organic transistors. After describing the design rationales and synthetic methodologies used for organic semiconductors and dielectric materials, the book provides an overview of a variety of characterization techniques used to probe interfacial ordering, microstructure, molecular packing, and orientation crucial to device performance. It also describes the different processing techniques for molecules deposited by vacuum and solution, followed by current technological examples that employ OTFTs in their operation. Featuring respected contributors from around the world, this thorough, up-to-date volume presents both the theory behind OFETs and the latest applications of this promising technology.
Book Synopsis Comprehensive Organic Functional Group Transformations II by :
Download or read book Comprehensive Organic Functional Group Transformations II written by and published by Elsevier. This book was released on 2004-12-16 with total page 9196 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comprehensive Organic Functional Group Transformations II (COFGT-II) will provide the first point of entry to the literature for all scientists interested in chemical transformations. Presenting the vast subject of organic synthesis in terms of the introduction and interconversion of all known functional groups, COFGT-II provides a unique information source documenting all methods of efficiently performing a particular transformation. Organised by the functional group formed, COFGT-II consists of 144 specialist reviews, written by leading scientists who evaluate and summarise the methods available for each functional group transformation. Also available online via ScienceDirect – featuring extensive browsing, searching, and internal cross-referencing between articles in the work, plus dynamic linking to journal articles and abstract databases, making navigation flexible and easy. For more information, pricing options and availability visit www.info.sciencedirect.com. By systematically treating each functional group in turn the work also identifies what is not known, thus pointing the way to new research areas Follows the systematic layout of the successful 1995 COFGT reference work, based on the arrangement and bonding of hetero-atoms around a central carbon atom The work will save researchers valuable time in their research as each chapter is written by experts who have critically read and reviewed the literature and presented the best methods of forming every known functional group
Book Synopsis Selectivity in Catalysis by : Mark E. Davis
Download or read book Selectivity in Catalysis written by Mark E. Davis and published by . This book was released on 1993 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: Discusses recent research and provides tutorial chapters on enhancing selectivity in catalysis through stereoselectivity, reaction pathway control, shape selectivity, and alloys and clusters. Presents an interdisciplinary approach to increasing selectivity in homogeneous and heterogeneous catalysis research. Includes an overview chapter that discusses the current state of the field and offers a perspective on future directions.
Book Synopsis Specimen Handling, Preparation, and Treatments in Surface Characterization by : Alvin W. Czanderna
Download or read book Specimen Handling, Preparation, and Treatments in Surface Characterization written by Alvin W. Czanderna and published by Springer Science & Business Media. This book was released on 1998 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is intended for professionals, researchers, technicians and students who are newcomers to the field as well as those with experience. It will be an important resource in the following fields: surface science, electronic materials and processes, thin film deposition, surface compositional analysis and related topical areas such as corrosion, oxidation, reduction, adsorption, desorption, adhesion, epitaxial growth and contamination. The presentation uses a tutorial and pedagogical approach.
