Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Characterization Of Self Assembled Monolayers Using The Ion Surface Reactivity Of Organic Projectile Ions
Download Characterization Of Self Assembled Monolayers Using The Ion Surface Reactivity Of Organic Projectile Ions full books in PDF, epub, and Kindle. Read online Characterization Of Self Assembled Monolayers Using The Ion Surface Reactivity Of Organic Projectile Ions ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Characterization of Self-assembled Monolayers Using the Ion-surface Reactivity of Organic Projectile Ions by : Rebecca Lynne Franklin
Download or read book Characterization of Self-assembled Monolayers Using the Ion-surface Reactivity of Organic Projectile Ions written by Rebecca Lynne Franklin and published by . This book was released on 1995 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Characterization of Self-Assembled Monolayers by Low Energy Reactive Ion Scattering: Influences of Terminal Group Composition and Structure on Ion-Surface Interaction by : Yang, Xi
Download or read book Characterization of Self-Assembled Monolayers by Low Energy Reactive Ion Scattering: Influences of Terminal Group Composition and Structure on Ion-Surface Interaction written by Yang, Xi and published by . This book was released on 2007 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt: Low energy (tens of eV) polyatomic cations were used as probes for characterization of monolayers of spontaneously chemisorbed thiols on gold. Characteristics including chemical composition, surface order and orientation of the self-assembled monolayers (SAMs) can be derived by monitoring the products of projectile ion neutralization, surface-induced dissociation (SID), and ion-surface reactions. To study the influence of the terminal group chemical structures and orientations of the SAMs on ion-surface interactions, a series of semi-fluorinated alkane thiols with difluoromethylenes buried underneath hydrocarbon terminal groups were examined (CH3CF2CH2− and CH3CH2CF2−). Compared to terminally fluorinated SAMs, they showed more projectile ion neutralization and less internal to vibrational energy deposition into precursor ions. Projectile ion-hydrocarbon reactions decreased significantly when difluoromethylenes are one or two bonds away from the terminal group. Furthermore, ion-surface reaction results on surfaces with odd and even chain lengths suggested that they have similar terminal methyl orientations to their hydrocarbon counterparts. Mixed monolayers of CF3CF2(CH2)14SH (F-SAMs) and CH3(CH2)15SH (H-SAMs) with systematically changing electron transfer, energy deposition and ion-surface reaction were prepared using mixed thiols solution and micro-contact printing (μ-CP). The solution mixture system showed linear variations in electron transfer and energy deposition with different F-SAM surface concentrations, while non-linear changes occur for ion-surface reaction suggesting strong lateral interactions between the two components. These interactions are minimized in theμ-CP system containing domains of each thiol. Energy deposition on the patterned surfaces varies non-linearly with changing F-SAM concentration which differs from the homogenously mixed system. To explore SID with a 90 collision angle, eV SID of a series of protonated peptide ions were performed in an in-line sector Time-Of-Flight (TOF) mass spectrometer. The results were compared to keV collision-induced dissociation (CID) data collected with the same instrument. Fragmentation efficiency for SID was higher than CID for those peptides. In addition to the excellent control over laboratory collision energies with SID, different amount of energy deposition can be achieved when varying surface composition, e.g. using mixed F-SAM/H-SAM. Reactive ion scattering spectrometry (RISS) results provided more in-depth knowledge of low energy ion-surface interactions that will promote usage of RISS as a novel surface characterization technique.
Book Synopsis Surface Characterization of Self-assembled Monolayers for Applications of Selective Ionic Transport Through Nanoporous Membranes by :
Download or read book Surface Characterization of Self-assembled Monolayers for Applications of Selective Ionic Transport Through Nanoporous Membranes written by and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Encyclopedia of Spectroscopy and Spectrometry by :
Download or read book Encyclopedia of Spectroscopy and Spectrometry written by and published by Academic Press. This book was released on 2016-09-22 with total page 3716 pages. Available in PDF, EPUB and Kindle. Book excerpt: This third edition of the Encyclopedia of Spectroscopy and Spectrometry, Three Volume Set provides authoritative and comprehensive coverage of all aspects of spectroscopy and closely related subjects that use the same fundamental principles, including mass spectrometry, imaging techniques and applications. It includes the history, theoretical background, details of instrumentation and technology, and current applications of the key areas of spectroscopy. The new edition will include over 80 new articles across the field. These will complement those from the previous edition, which have been brought up-to-date to reflect the latest trends in the field. Coverage in the third edition includes: Atomic spectroscopy Electronic spectroscopy Fundamentals in spectroscopy High-Energy spectroscopy Magnetic resonance Mass spectrometry Spatially-resolved spectroscopic analysis Vibrational, rotational and Raman spectroscopies The new edition is aimed at professional scientists seeking to familiarize themselves with particular topics quickly and easily. This major reference work continues to be clear and accessible and focus on the fundamental principles, techniques and applications of spectroscopy and spectrometry. Incorporates more than 150 color figures, 5,000 references, and 300 articles for a thorough examination of the field Highlights new research and promotes innovation in applied areas ranging from food science and forensics to biomedicine and health Presents a one-stop resource for quick access to answers and an in-depth examination of topics in the spectroscopy and spectrometry arenas
Book Synopsis Surface Structure and Stereochemical Properties of Self-assembled Monolayer Materials . Progress Report by :
Download or read book Surface Structure and Stereochemical Properties of Self-assembled Monolayer Materials . Progress Report written by and published by . This book was released on 1993 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: This document reports the progress the authors have made in support of their proposal to generate well-characterized, well-ordered organic surfaces and to impinge upon the array of oriented organic molecules a well-collimated beam of radical atoms at a well-defined angle of incidence. Using the intensity of helium atom diffraction from the organic surface as a measure of the number of unreacted molecules at the surface, the authors will measure the rate of the reaction. They will then vary the angle of incidence of the reactive atom beam and repeat the measurement. In this manner they plan to map out the reactivity of the molecules on the surface as a function of the angle of incidence of the reactive moiety. To carry out this experiment requires that two fields of research be brought together: (1) molecular beam technology and (2) the science/art of growing well-ordered organic surfaces. The first half of this report describes recent helium diffraction results from molecular beam deposited organic monolayers (structural layer characterization work). The second half reports progress in constructing and characterizing the reactive atom (oxygen) beam source.
Book Synopsis Principles and Applications of Ion Scattering Spectrometry by : J. Wayne Rabalais
Download or read book Principles and Applications of Ion Scattering Spectrometry written by J. Wayne Rabalais and published by Wiley-Interscience. This book was released on 2003 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first authoritative account of ion scattering spectrometry for both students and researchers Ion scattering spectrometry, a powerful analytical tool used to determine the structure and composition of a substance, addresses critical problems in semiconductors, thin film growth, coatings, computer chips, magnetic storage devices, bioreactive surfaces, catalytic surfaces, and electrochemical surfaces (including the large battery industry). Principles and Applications of Ion Scattering Spectrometry: Surface Chemical and Structural Analysis represents the first and only book on this exciting field, seamlessly merging theoretical fundamentals with cutting-edge practical applications. Author J. Wayne Rabalais, the world's leading expert in ion scattering spectrometry, recognizes both the pedagogic and research needs of such a text and divides his work accordingly. Chapters 1 through 5 address senior undergraduates and beginning graduate students in chemical physics and include figures and illustrative diagrams intended to exemplify the discussions. Chapters 6 through 9 comprise material on the brink of current research and contain specific references to other sources at the end of each; further, chapter 10 is a bibliography of ion scattering publications. Topics covered include: * Introductory, theoretical, and experimental aspects of ion scattering * General features and structural analysis * The recent technique of scattering and recoiling imaging spectrometry * Examples of structural analysis * Ion-surface charge exchange phenomena * Hyperthermal ion-surface interactions Engineers, researchers, professors, and postdoctoral associates involved in surface analysis, surface science, and studies of surfaces of materials will find Rabalais' incomparable study a seminal moment in the advance of ion scattering spectrometry.
Book Synopsis Tuning Surface Properties Using Self-assembled Monolayers for Various Applications by : Yekaterina Leonidovna Lyubarskaya
Download or read book Tuning Surface Properties Using Self-assembled Monolayers for Various Applications written by Yekaterina Leonidovna Lyubarskaya and published by . This book was released on 2014 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The research presented in this dissertation focuses on the study of self-assembled monolayers (SAMs) in the modification of surface properties of different substrates for various applications. Self-assembled monolayers are organic molecules that can be deposited on a variety of surfaces, such as those of metals, metal-oxides, and semiconductors. Formation of SAMs on any inorganic material provides a ubiquitous way to impart desirable chemical and physical properties of organic and biological molecules to the inorganic substrate. It has been demonstrated that single molecules and their self-assembled monolayers can significantly alter the physical and electronic properties of inorganic conductors; moreover, studies have shown that the performance of many electrical devices can be transformed by modifying inorganic electrodes with organic SAMs. This is especially important for the development of next generation of ultra-compact electronic devices, in which the ability to control the interfacial charge-transport with a single monolayer of organic molecules would be ideal. We have developed different organic electronic architectures as test beds for studying the effect of monolayer properties, such as structural and geometrical parameters, on their electronic properties. By using a typical organic electronic device as a sensitive test platform, slight changes in a monolayer property, such as length, have been detected by studying the current- voltage characteristics (JV) of organic diodes functionalized with self-assembled monolayers (SAMs) of varying alkyl chain-length. Next, we describe the application of SAMs based on n-octylphosphonic acid (C8PA) and 1H,1H,2H,2H-perfluorooctanephosphonic acid (PFOPA) as anode buffer layers in C60-based organic photovoltaic (OPV) devices. We used the OPV platform to compare stabilities of organic monolayers exposed to ambient conditions with SAMs positioned inside working OPV devices. We found that the stabilities are different, suggesting the degradation mechanisms are distinct. The degradation of the OPV efficiency with respect to air exposure was significantly reduced with the perfluorinated PFOPA compared to the aliphatic C8PA. We attributed the OPV degradation to moisture diffusion from the top aluminum electrode and we discuss that the lowering of the anode work function is the result of hydrolysis of the SAM buffer layer. Next, we demonstrated the dependence of molecular electronic properties on the functional group substitution and that the changes in these properties can be measured using the organic light-emitting (OLED) platform. Specifically, we compared bilayered organic monomolecular systems immobilized on an inorganic electrode as the charge-injecting components of the organic light emitting diodes (OLEDs). Our bilayered interfaces comprise ordered inert primary and functional reactive layers, and they differ in only one parameter: the molecular structure of the terminal functional group. We demonstrate that we can visualize the differences in the charge transfer dynamics of two bilayered systems via patterned electroluminescence. In addition, we describe a new protocol for the preparation of shape-controlled multicomponent particles comprising metallic (Au and Ti), magnetic (Ni), and oxide (SiO2, TiO2) layers. First, we discuss the application and attractiveness of the colloidal structures, Janus Particles (JPs), that possess two different surfaces, varying either in polarity, hydrophilicity, etc. Next, we present our method for specifically controlling the composition, shape, and size of the micro-JPs. We demonstrate how this protocol permits fabrication of non-symmetrical particles by orthogonally functionalizing their opposite sides using well-established organosilanes and thiol chemistries (based on SAMs). We propose that these colloids may be used as convenient materials for studying non-symmetrical self-assembly at the meso- and micro-scales, due to their unique geometries and surface chemistries"--Pages viii-x.
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.
Book Synopsis Organic Self-assembled Monolayers for Reconstitution of Ion Channels on Single Crystal Silicon by : Maryna Ornatska
Download or read book Organic Self-assembled Monolayers for Reconstitution of Ion Channels on Single Crystal Silicon written by Maryna Ornatska and published by . This book was released on 2003 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: The major goal of this research is to understand design principles of interfaces, suitable for the reconstitution the ion channel membrane proteins. In the present work, we focused on the immobilization of two channel proteins, [alpha]-Hemolysin from Staphylococcus aureus and Mechanosensitive Ion Channel of Large Conductance (MscL) from Salmonella typhimurium, onto single crystal silicon substrates (silicon wafers). High-resolution atomic force microscopy (AFM) was utilized as a tool for the monitoring of the molecular conformations of the ion channels after immobilization. As observed, [alpha]-Hemolysin was adsorbed onto bare silicon in collapsed state, while adsorption of MscL resulted in unraveling of the protein. LB deposition of proteins embedded in lipid monolayer reduced denaturation of the proteins on silicon surface, due to reduced surface energy. Octadecyltimethoxy silane (ODTMS) self-assembled monolayers (SAMs) were used as a "buffer layer analog" of a lipid membrane. MscL was successfully reconstituted in these organic SAMs. Analysis of dimensions of the MscL displayed that the gating state and the molecular conformation of SAM-supported MscL can be controlled by variation of the surface energy of the supporting surface layer. Closed, intermediate, and open states were observed on surfaces with different surface tensions. Obtained results demonstrated an agreement with known molecular modeling data for gating mechanisms of the MscL protein in lipid membrane.
Book Synopsis Characterization of Self-assembled Monolayers for Use as a Matrix in Laser Desorption Ionization by : Kevin L. Francis
Download or read book Characterization of Self-assembled Monolayers for Use as a Matrix in Laser Desorption Ionization written by Kevin L. Francis and published by . This book was released on 2007 with total page 170 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 2001 with total page 698 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Encyclopedia of Mass Spectrometry by : Michael L. Gross
Download or read book The Encyclopedia of Mass Spectrometry written by Michael L. Gross and published by Pergamon. This book was released on 2003-07-25 with total page 954 pages. Available in PDF, EPUB and Kindle. Book excerpt: This multi-volume work provides comprehensive coverage of the full range of topics and techniques in mass spectrometry. Techniques, methods and applications are described in detail; including limitations, current problems, and areas in which the method does not succeed well.
Download or read book Mass Spectrometry Bulletin written by and published by . This book was released on 1999 with total page 594 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Advances in Mass Spectrometry by : I. Cornides
Download or read book Advances in Mass Spectrometry written by I. Cornides and published by Wiley. This book was released on 1995-12-05 with total page 674 pages. Available in PDF, EPUB and Kindle. Book excerpt: This indispensable reference source contains the complete texts of the invited plenary and keynote lectures from the 13th International Mass Spectrometry Conference held in the autumn of 1994. It presents a comprehensive account of all methods and applications of mass spectrometry, covering the most important developments that have occurred in all fields of this area within the past three years.
Book Synopsis Directory of Graduate Research by : American Chemical Society. Committee on Professional Training
Download or read book Directory of Graduate Research written by American Chemical Society. Committee on Professional Training and published by . This book was released on 2005 with total page 1932 pages. Available in PDF, EPUB and Kindle. Book excerpt: Faculties, publications and doctoral theses in departments or divisions of chemistry, chemical engineering, biochemistry and pharmaceutical and/or medicinal chemistry at universities in the United States and Canada.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1990 with total page 672 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Cluster Assembled Materials by : Klaus Sattler
Download or read book Cluster Assembled Materials written by Klaus Sattler and published by CRC Press. This book was released on 1996 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is now some 15 years since atomic clusters were first produced and investigated in laboratories. Since then, knowledge concerning clusters has enjoyed rapid and sustained growth, and cluster research has become a new branch of science.
