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Showing 1 to 17 of 17 for “"Brewster Angle Microscopy"”.
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Monolayer Studies of Mixed Films Containing Cerebrosides by Surface Tensiometry and Brewster Angle Microscopy
In this work surface pressure-area isotherms and Brewster angle microscope (BAM) images were obtained for two-component Langmuir monolayers of bovine and porcine cerebrosides with cholesterol and palmitic acid (PA), respectively, at the air-water interface. BAM images of bovine and porcine …
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Imaging of Heterogeneous Langmuir -Blodgett Monolayer with Compressive Sensing Sum Frequency Generation Microscopy and Brewster Angle Microscopy
The heterogeneity of biological surfaces has been intensively and widely studied and discussed in the last few decades. The membrane of various phospholipid components, as a critical prototype of biological surfaces, can separate into different domains at the air-water interface, with distinct …
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Synthesis of polyionic tetraazaporphyrins and their Langmuir-Blodgett properties.
… by their isotherms, ellipsometry and Brewster angle microscopy whereas the transferred Langmuir Blodgett films were characterized by linear polarized UV/VIS spectroscopy or ellipsometry. The length of the aliphatic spacer and the pH of the subphase were found to be crucial in governing …
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Surface Characterization of Poly (epsilon-caprolactone) at the Air/Water Interface
… on PCL crystallization in Langmuir monolayers. Brewster angle microscopy (BAM) studies show that square, distorted rectangular, and dendritic crystals form at the A/W interface. While dendritic structures have been observed in poly (ethylene oxide) (PEO) thin film on solid substrates, this study …
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Synthesis and Characterization of Polyhedral Oligomeric Silsesquioxane (POSS) Based Amphiphiles
… - area per molecule (? -A) isotherms as well as Brewster angle microscopy (BAM) at the air/water (A/W) interface. Compared with previous work on trisilanol-POSS derivatives, the results indicated that POSS-triester was surface active and formed a liquid-expanded (LE) monolayer. In contrast, …
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Structure and Dynamics of Polyhedral Oligomeric Silsesquioxane (POSS) and Poly(Ethylene Glycol) (PEG) Based Amphiphiles as Langmuir Monolayers at the Air/Water Interface
… and Langmuir-Blodgett (LB) techniques along with Brewster angle microscopy (BAM) have been identified as key methods for acquiring structural, thermodynamic, rheological and morphological information. These techniques along with surface light scattering (SLS), a method for probing a monolayer's …
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Synthesis and Characterization of Polyhedral Oligomeric Silsesquioxane (POSS) Based Amphiphiles
… pressure – area per molecule (Π-A) isotherm and Brewster angle microscopy (BAM) studies at the A/W interface. The results indicated that POSS-triester is surface active forming a liquid expanded (LE) monolayer, whereas POSS-triacid forms a liquid condensed (LC) monolayer that is only weakly …
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Surface Characterization of Siloxane, Silsesquioxane, and Maleic Anhydride Containing Polymers at Air/Liquid Interfaces
… was examined using a combination of LB and Brewster angle microscopy (BAM).Polymer fillers have been shown to reduce the cost and often improve the properties of high performance polymer composites. The utility of POSS as a potential nanofiller in blends with polymers such as …
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Biophysical Characterization of Nanoparticle Interactions with Lung Surfactant Models for Enhanced Pulmonary Drug Delivery
… Imaging of the monolayer was conducted with Brewster angle microscopy to visualize changes in the organization of the surfactant models. Gelatin and polyisobutylcyanoacrylate nanoparticles are both biocompatible materials that have been tested for inhalable drug delivery and are used in these …
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Vaping Additives Affect Lateral Organization and Functionality of Lung Surfactant Model Systems
… organization of the films was conducted with Brewster angle microscopy. Visualization of BLES was also carried out with atomic force microscopy, which allowed for higher resolution images of the surfactant’s molecular architecture. Vape additives were found to destabilize domain formations in …
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Poly(L-Lactic Acid) Langmuir Monolayers at the Air/Water Interface and Langmuir-Blodgett Films on Solid Substrates: Phase Behavior, Surface Morphology, and Crystallinity
… using surface pressure-area (Pi-A) isotherm and Brewster angle microscopy (BAM) are vital. PLLA exhibits a first-order liquid expanded to condensed (LE/LC) phase transition with molar mass dependent critical phenomena, the first such observation for a homopolymer Langmuir monolayer. Atomic force …
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Phase Behavior of Poly(Caprolactone) Based Polymer Blends As Langmuir Films at the Air/Water Interface
… Langmuir monolayers was first studied by Brewster angle microscopy (BAM). PCL crystals observed during film compression exhibit butterfly-shapes. During expansion of the crystallized film, polymer chains detach from the crystals and diffuse back into the monolayer as the crystals "melt". …
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Interfacial Characterization of Polyhedral Oligomeric Silsesquioxane (POSS) Amphiphiles and Polymer Blends: Thermodynamics, Morphology, and Rheology
… per molecule (π-<i>A</i>) isotherm, Brewster angle microscopy (BAM), and interfacial stress rheometry (ISR) studies. Results for POSS Langmuir thin films at A/W show that trisilanol-POSS derivatives are a new class of amphiphiles, that exhibit multiple phase transitions in going from …
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Physical Chemistry of Gemini Surfactant Monolayers
… including surface pressure-area isotherms, Brewster angle microscopy (BAM) and atomic force microscopy (AFM) were used to explore the effect of ion-binding and mixing on the thermodynamics of mixing and the morphology of the monolayer films. Figure 1: Chemical structure of Ace(n)-2-Ace(n) (n …
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Phase and Rheological Behavior of Langmuir Films at the Air/Water Interface: Polyhederal Oligomeric Silsesquioxanes (POSS), POSS/Polymer Blends, and Magnetic Nanoparticles
… With the equipment of Wilhelmy plate technique, Brewster angle microscopy (BAM), and surface light scattering (SLS), the interfacial phase and rheological behavior of Langmuir films can be investigated. In this dissertation, these techniques are employed to examine Langmuir films of polyhedral …
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A Study of the Membrane Binding Properties of the Matrix Protein from Human Respiratory Syncytial Virus
… of the monolayer at the surface using Brewster angle microscopy (BAM), and examination of monolayers deposited on a modified silicon surface by atomic force microscopy (AFM). The findings described herein suggest that specific interactions with sphingomyelin may provide a mechanism for …
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Synthesis, redox properties, and langmuir monolayer formation of selected 3d- and 4d- metalloamphiphiles
… as characterized by compression isotherms and Brewster angle microscopy. Relative solubility in water for the ruthenium pyridyl complexes requires the presence of an aqueous NaCl subphase for proper film formation.</p> <p>We have also reported on the tetrametallic complex [FeII(FeIIIL2)3](PF6)2 …