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2 edition of effect of multiple alkylchains upon molecular orientationinfloating monolayers and langmuir found in the catalog.

effect of multiple alkylchains upon molecular orientationinfloating monolayers and langmuir

K.A Longstaff

effect of multiple alkylchains upon molecular orientationinfloating monolayers and langmuir

by K.A Longstaff

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Published by UMIST in Manchester .
Written in English


Edition Notes

StatementK.A. Longstaff ; supervisedbyD.A Leigh.
ContributionsLeigh, D.A., Chemistry.
ID Numbers
Open LibraryOL20378025M

DeepDyve is the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. Notes DesignandTestingofaLow-CostandCompact BrewsterAngleMicroscope tuart* DepartmentofPhysicalandColloidChemistry.

Chemistry. A Langmuir monolayer or insoluble monolayer is a one-molecule thick layer of an insoluble organic material spread onto an aqueous subphase in a Langmuir-Blodgett ional compounds used to prepare Langmuir monolayers are amphiphilic materials that possess a hydrophilic headgroup and a hydrophobic tail. Since the s a large number of other materials have been employed to. Mixed monolayers have also been studied, e.g. to model the tear fluid lipid layer [5,6] or look at phase coexistence [7], and to study monolayer collapse in the presence of lung surfactant proteins [8,9].

Uncommon methods of formation and analysis of lipid monolayers have enabled the recognition of several monolayer states and the identification of that in which molecular organization corresponds closely to that of the bilayer. Monolayers were formed by continuously adding a solution of phospholipid [dimyristoyl phosphatidylcholine in hexane Cited by: Langmuir Volume 3 Issue 5 [Doi %2Flaa] Fuller, E. L - Free download as PDF File .pdf), Text File .txt) or read online for free. Surface .


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Effect of multiple alkylchains upon molecular orientationinfloating monolayers and langmuir by K.A Longstaff Download PDF EPUB FB2

A Langmuir monolayer is a monomolecular film formed at the air-water interface, usually composed of amphiphilic molecules. As an ideal two-dimensional system and a model of biomembranes, it has been studied for more than a century.

Developing an Anticancer Copper(II) Multitarget Pro-Drug Based on the His Residue in the IB Subdomain of Modified Human Serum Albumin; Lasing in. We describe the formation of alkyl monolayers on silicon carbide (SiC) and silicon-rich silicon nitride (SixN4) surfaces, using UV irradiation in the presence of alkenes.

Both the surface preparation and the monolayer attachment were carried out under ambient conditions. The stable coatings obtained in this way were studied by water contact angle measurements, infrared reflection absorption Cited by: Langmuir monolayers, Langmuir 23 () – [21] K.

Kewalramani, H. Hlaing, B.M. Ocko, et al., Effects of divalent cations on phase behaviour and structure of a zwitterionic phospholipid (DMPC). Excerpt from An Analysis of Molecular Volumes From the Point of View of the Lewis-Langmuir Theory of Molecular Structure: A Dissertation Two facts, in particular, are brought out by the foregoing analysis.

First, isosteric atoms, molecules and groups appear to have the same volume regardless of the particular kinds of atoms of which they are Format: Paperback. Introduction.

Deposition of defect-free Langmuir monolayers on solid surfaces is important for their utility in device-fabrication.

The Langmuir–Blodgett (LB) 1, 2technique is often used for this purpose. Two methods `in vogue' are (1) moving the substrate up and down through the subphase or (2) bringing the substrate horizontally in contact with the Langmuir by: 6.

The molecular organization of purely aromatic, polyphenyl carboxylic acids, as Langmuir monolayers at the air/water interface, has been investigated by means of surface pressure and electric surface potential measurements upon film by: 2.

Insoluble Langmuir monolayers are investigated in the presence of dipolar forces which can have two origins: permanent dipoles in neutral monolayers and induced dipoles in charged monolayers. The main effect of the additional long‐range repulsive interactions is to stabilize undulating phases at thermodynamic by: Langmuir-Blodgett monolayers exhibited nanoscale molecular clusters with characteristic dimensions of nm; enhanced linactant efficiency was systematically correlated with larger clusters.

Introduction The performance of surfactant molecules in lowering the interfacial tension of a File Size: 4MB. Grazing Incidence X-Ray Diffraction (GIXD) from Langmuir Monolayers.

The 2D order in the monolayer can be resolved using GIXD. The methods gives valuable information about change in molecular ordering due to interactions with solutes such as skeletal proteins or changes in the surface pressure.

This work reports on the preparation and investigation of ultrathin polymer films based on 10,pentacosadiynoic acid pentacosadiynamine. Mixed catanionic Langmuir monolayers formed from these compounds at different component ratios have been studied.

It has been established that the electrostatic attraction of the head groups of monolayer components facilitates spreading of Cited by: 1. The order of the salts followed an inverse Hofmeister series.

On the other hand, when the protein layer was near its isoelectric point (pH 5), the most chaotropic anions caused the greatest increase in water structure, although the effect was weak.

In this case, a Cited by: Ion interaction at the interface of Langmuir monolayers having amine headgroups Doseok Kim Department of Physics, Sogang University, Seoul, Korea reflects molecular DPTAP full monolayers on NaCl solutions on NaI solutions 1E-4 1E-3 1 1 10 0 5 50 aterFile Size: 9MB.

Molecular organogels, comprising small organic gelators in solvents, can be applied for dispersal of optical devices, such as emitters. Phenolic compounds and the surfactant bis(2-ethylhexyl) sulfosuccinate (AOT) are known examples of self-assembly organogels.

However, conventional phenol + AOT gels in aromatic and acyclic alkane solvents are optically turbid, which is an obstacle for use as.

In this article, a layer-by-layer (LbL)-assembled coordination multilayer on planar and 3D substrates was explored by the alternate deposition of a transition-metal-containing polyelectrolyte and a ligand-containing polymer via the formation of by: Lewis-Langmuir theory definition is - a chemical theory of atomic structure: the atom consists of a positive nucleus surrounded by concentric cubic shells at the corners of which the electrons are located.

component Langmuir films is an active field of research [1–5]. The interactions and organization of two molecu-lar components occupying the same two-dimensional space have been explored by thermodynamic [6,7] and micro-scopic [2,8–10] approaches.

Monolayers component misci-bility [6], distribution [11] domain growth [12], nucleation. The liquid phases of Langmuir monolayers are studied in a simple continuum model in which molecules are treated as flexible chains made up of rodlike segments, with the head confined to the air‐water interface.

The model is studied within mean‐field approximation. We show that both properties of chain flexibility and of segment rigidity, with concomitant anisotropic rodlike interactions Cited by: The octet rule is a chemical rule of thumb that reflects the observation that elements tend to bond in such a way that each atom has eight electrons in its valence shell, giving it the same electronic configuration as a noble rule is especially applicable to carbon, nitrogen, oxygen, and the halogens, but also to metals such as sodium or magnesium.

Silica nanoparticles are most commonly modified with amino-silanes, followed by post-modification activation for protein immobilization. In this work, epoxy-functionalized silica nanoparticles were prepared by modification with glycidyloxypropyl trimethoxysilane (GPTMS) for direct protein immobilization.

Silica nanoparticles possessed an average size of 46 nm, but increased to 63 nm after Cited by:. General introduction 3 Materials suitable for the formation of monolayers at the air-water interface are amphiphiles bearing a hydrophilic (“water loving”) headgroup and a hydrophobic (“water hating”) tail.

Classical monolayer forming materials are fatty acids (like arachidic or stearic acid) with a carboxylic headgroup and a long alkyl.A new adsorption isotherm model of aqueous solutions on granular activated carbon Hossein Shahbeig 1∗, Nafiseh Bagheri2, Sohrab Ali Ghorbanian1, Ahmad Hallajisani, Sara Poorkarimi2 1 School of Chemical Engineering, University College of Engineering, University of File Size: KB.The rest of this article is focused on the basic concepts of the brush polymer monolayers at the air–water interfaces, their nanostructure and transitions upon various factors, i.e., brush.