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Synthesis And Characterization Of Self Assembled Monolayers On Gold Generated From Chelating Alkanethiols
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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 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 Study of Self-assembled Monolayers on Gold Generated from Chelating Alkanedithiols by : Young-Seok Shon
Download or read book Synthesis and Study of Self-assembled Monolayers on Gold Generated from Chelating Alkanedithiols written by Young-Seok Shon and published by . This book was released on 1999 with total page 420 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 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 Synthesis and Characterization of 1,1'-diorganosulfur Substituted Ferrocenes for the Formation of Self-assembled Monolayers on Gold Surfaces by : Dawei Wen
Download or read book Synthesis and Characterization of 1,1'-diorganosulfur Substituted Ferrocenes for the Formation of Self-assembled Monolayers on Gold Surfaces written by Dawei Wen and published by . This book was released on 1996 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Functional Polymer Films, 2 Volume Set by : Wolfgang Knoll
Download or read book Functional Polymer Films, 2 Volume Set written by Wolfgang Knoll and published by John Wiley & Sons. This book was released on 2013-02-12 with total page 1107 pages. Available in PDF, EPUB and Kindle. Book excerpt: Very thin film materials have emerged as a highly interesting and useful quasi 2D-state functionality. They have given rise to numerous applications ranging from protective and smart coatings to electronics, sensors and display technology as well as serving biological, analytical and medical purposes. The tailoring of polymer film properties and functions has become a major research field. As opposed to the traditional treatise on polymer and resin-based coatings, this one-stop reference is the first to give readers a comprehensive view of the latest macromolecular and supramolecular film-based nanotechnology. Bringing together all the important facets and state-of-the-art research, the two well-structured volumes cover film assembly and depostion, functionality and patterning, and analysis and characterization. The result is an in-depth understanding of the phenomena, ordering, scale effects, fabrication, and analysis of polymer ultrathin films. This book will be a valuable addition for Materials Scientists, Polymer Chemists, Surface Scientists, Bioengineers, Coatings Specialists, Chemical Engineers, and Scientists working in this important research field and industry.
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 Growth and Structural Characterization of Self-assembled Monolayers (SAMs) on Gold Made from Functionalized Thiols and Selenols by : Asif Bashir
Download or read book Growth and Structural Characterization of Self-assembled Monolayers (SAMs) on Gold Made from Functionalized Thiols and Selenols written by Asif Bashir and published by . This book was released on 2008 with total page 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 Self-assembled Monolayers and Multilayers for Molecular Scale Device Applications by : Ernesto R. Soto-Villatoro
Download or read book Self-assembled Monolayers and Multilayers for Molecular Scale Device Applications written by Ernesto R. Soto-Villatoro and published by . This book was released on 2005 with total page 846 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Self-assembled monolayers (SAMs) are organized molecular assemblies that are formed by spontaneous adsorption of a compound in solution to a surface (e.g. alkanethiols on gold). The design, preparation, and characterization of several self-assembled monolayers and multilayers on surfaces (gold, indium tin oxide and quartz) are described. The systems were chosen based on their ability to form ordered films and to perform a given device function. SAMs were fabricated with selected functional groups at the air-monolayer interface, capable of complexing metal ions (e.g. dicarboxypyridine, dicarboxybenzene, imidazole, 4-hydroxypyridine) with the purpose of using these SAMs to construct multilayered films. Deposition of a second layer consisting of metal ions (e.g. Cu(II), Co(II) and Fe(III)), occurs by non-covalent metal ligand binding interactions between the metal ion layer and the different organic ligands on the surface. Deposition of subsequent layers was achieved by the incorporation of the appropriate organic ligands and metal ions. These monolayers and multilayered films were characterized by contact angle measurements, ellipsometry, grazing angle FT-IR, cyclic voltammetry and impedance spectroscopy following deposition of each layer on the film. Electrochemical analysis of the multilayered films shows alternating insulating/conducting behavior (cyclic voltammetry) and alternating changes in films capacitance (impedance spectroscopy) depending on the outermost layer of the film. Films capped with an organic layer show low conductivity, while films capped with a metal layer show conducting behavior. The electrochemical behavior of the films is related to the degree of "leakiness" or electrolyte solution permeation through the film, which is high for films with metal layers as the top layer and decreases once the film is capped with an organic layer. The alternating conducting/insulating behavior of the films allows for fabrication of multilayered thin films of variable thickness and tunable conducting properties. Ordered films were fabricated with up to seven layers of dicarboxypyridine and Cu(II), and 4-hydroxypyridine and Fe(III) metal-ligand units. The construction of these films provides an example of molecular films that could function as molecular wires or junctions due to their controllable electrochemical properties. Photocurrent generating films were fabricated by incorporation of chromophore groups (e.g. pyrene, porphyrins) into the multilayered structures. These films generate cathodic or anodic current upon photoexcitation of the chromophores. The monolayers functionalized with different organic ligands were also used to study lanthanide complexation on the surfaces. Successful deposition of different lanthanide ions was achieved from DMSO solutions. Monolayers of a bicyclic structure, 4, 7, 13, 16-tetraoxa-1,10,21-triaza-bicycle[8.8.5] tricosane-19,23-dione, attached to a hexadecanethiol molecule were used to study the ability of metal ion detection on the surface using electrochemical (cyclic voltammetry and impedance spectroscopy) techniques. The SAMs show higher complexation affinity for Li+ than for Na+ or K+. Preliminary studies were also carried out to investigate the ability of different SAMs to cell adhesion interactions. Future experiments will help elucidate a systematic relation of cell adherence and the bulk and molecular-level properties of the functionalized surfaces. The different multilayered films described in this dissertation served as preliminary models for different molecular scale device applications. Current work is focused in the design and preparation of more efficient photocurrent generating films, highly selective sensors for different types of ions, surfaces for cell adhesion and microbial interactions, and the study of other potential applications such as the design of micro and nanofluidic devices.
Book Synopsis Investigation of the Structure of Alkyne Self-assembled Monolayers on Gold and the Development of Matrix-enhanced Secondary Ion Mass Spectrometry Methods by : Jennifer Joan Dertinger
Download or read book Investigation of the Structure of Alkyne Self-assembled Monolayers on Gold and the Development of Matrix-enhanced Secondary Ion Mass Spectrometry Methods written by Jennifer Joan Dertinger and published by . This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Characterization of thin films is critical to the understanding of many technological and biological processes. The focus of this dissertation is to develop methods to characterize very low concentration species present on surfaces. A reflection adsorption infrared spectroscopy (RAIRS) system was constructed and tested. The instrument comprises an Fourier transform infrared (FTIR) spectrometer, an optical pathway and a vacuum chamber. The RAIRS system is designed to investigate in situ the interaction of vapor-deposited metals and gases, such as CVD precursors, with organic thin films, and so a vacuum chamber is required. To accommodate the vacuum chamber, an external IR optical pathway was designed and assembled because there was not enough room in the internal optical pathway of the FTIR spectrometer. The synthesis and characterization of terminal alkyne monolayers (TAMs) adsorbed on gold was investigated by RAIRS, single wavelength ellipsometry, time-of-flight secondary ion mass spectrometry (TOF SIMS) and x-ray photoelectron spectroscopy (XPS). TAMs have the potential to transform surface functionalization for many technological applications because they have increased temperature stability and electrical conductance. However, the data suggest that TAMs are not well-ordered and can be oxidized, which may limit their application. For TAMs with less than 11 methylene units in the backbone, the adsorbed layer is highly disordered, oxidized and has a multilayer structure. Longer chain length TAMs form disordered monolayers on gold. As the methylene chain length increases, the conformational order of the TAMs increases with the alkynes in an upright conformation and bound to the surface via a Au-C[identical to]C- bond. The use of room temperature ionic liquids (ILs) as matrices in TOF SIMS was examined to further characterize biological thin films. The data indicate that the secondary ion intensities of lipids, steroids, peptides, proteins and proteins are significantly enhanced using IL matrices. Secondary ion enhancements of at least an order of magnitude are typically observed. Limits of detection are also greatly improved. For example, the limits of detection of 1,2-dipalmityl-sn-glycero-phosphocholine (DPPC) and 1,2-dipalmityl-sn-glycero-phosphoethanolamine (DPPE) were at least two orders of magnitude better. The data also show that ILs are suitable matrices for imaging SIMS. The IL matrices did not cause changes to the sample surface; no "hot spots" were observed. The mechanism of the secondary ion intensity enhancements using IL matrices was then investigated to optimize use in characterization. Only protic ILs, which are formed by the transfer of a proton from a Brønsted acid to base, were observed to increase analyte signals. The matrix enhancement mechanism therefore involves the transfer of protons from, or to, the analyte, to, or from the matrix. The magnitude of the analyte signal enhancements is dependent on the chemistry of the matrix cation, anion and analyte. The pKa of the matrix acid and base do not appear to have a strong effect on the ion-intensity enhancements. The results also indicate that the chemical identity of the matrix anion has a stronger effect on analyte signal enhancements than the matrix cation
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2005 with total page 780 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis, Characterization and Self-assembly of Gold Nanorods an Surface-enhanced Raman Studies by : Babak Nikoobakht
Download or read book Synthesis, Characterization and Self-assembly of Gold Nanorods an Surface-enhanced Raman Studies written by Babak Nikoobakht and published by . This book was released on 2002 with total page 542 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Self-assembled Monolayers for Biological Applications by : Adriana R. Kyvik
Download or read book Self-assembled Monolayers for Biological Applications written by Adriana R. Kyvik and published by . This book was released on 2018 with total page 217 pages. Available in PDF, EPUB and Kindle. Book excerpt: Self-assembled monolayers (SAMs) on gold surfaces have been designed, processed, characterized and used for specific biological studies. The studies performed include the control of lipid bilayer diffusion, cell adhesion and vascularization studies and also the creation of antimicrobial surfaces. More specifically, dynamic SAMs on surfaces whose properties can be modified with an electrochemical external stimulus have been developed and used to interrogate biological systems. The developed platform has been applied to two different applications to overcome present challenges when performing biological studies. Firstly, in Chapter 2, the design and synthesis of all the molecules needed to develop an electroactive platform, its processing as SAMs and the optimization of the surface confined redox process between a non-reactive Hydroquinone (HQ) termination and its corresponding reactive Benzoquinone (BQ) is reported. Two different interfacial reactions taking place on the electroactivated surfaces were studied in detail; the Diels-Alder (DA) and the Michael Addition (MA) interfacial reactions, with cyclopentadiene (Cp) or thiol tagged molecules, respectively. The comparative study between DA and MA as surface functionalization strategies with a temporal control reveal that even though MA is not commonly used for this purpose it offers an attractive strategy for stimulus activated functionalization for biological applications. In Chapter 3, the developed platform has been used to achieve a temporal control of cell adhesion and in this way mimic in vivo conditions more accurately. Cell adhesion plays fundamental roles in biological functions and as such, it is important to control cell adhesion on materials used for biomedical applications. Towards this aim, the dynamic interface developed has been used to immobilize cell adhesion promoting peptides through the two different interfacial reactions, namely the DA and the MA reaction, and a comparative study has been carried out. Moreover, a study involving immobilized VEGF-mimicking peptide Qk has been conducted demonstrating the possibility of using the novel peptide for directing cell differentiation into tubular networks for in vitro platforms, by attaching them on a surface. In Chapter 4, we have used the developed electroactive interface to control the dynamics of lipid bilayers as cell membrane models, designed for transmembrane protein characterization in a more in vivo like environment. Specifically, electroactive SAMs have been used to control the moment in which tethering of lipid bilayer deposited on them occurs and consequently decrease its diffusion. In this way, proteins and lipids can maintain their fluidity until tethering is desired, a useful platform for transmembrane protein characterization. iii Finally, in Chapter 5, a surface biofunctionalization strategy also based on SAMs has been used to produce a bactericidal surface by successfully immobilizing novel antimicrobial proteins produced by recombinant DNA technology. This is relevant in view of the verge of an imminent antibiotics crisis. To confirm the antimicrobial activity and biofilm growth prevention of these surfaces, a biofilm assay was performed demonstrating that proteins retain their antimicrobial effect when immobilized. All these strategies open new possibilities for controlled biomolecule immobilization for fundamental biological studies and for applications in biotechnology, in the interface of materials science and biology.
Download or read book Chemical Abstracts written by and published by . This book was released on 2002 with total page 2540 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis and Electrochemical Characterization of 1,12-diferrocenyldodecane-tagged Self-assembled Monolayers by : Richard L. Porter
Download or read book Synthesis and Electrochemical Characterization of 1,12-diferrocenyldodecane-tagged Self-assembled Monolayers written by Richard L. Porter and published by . This book was released on 2005 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:
