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Showing 1 to 20 of 87 for “"Dynamic light scattering (DLS)"”.
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Quantitative Model for the Prediction of Hydrodynamic Size of Nonionic Reverse Micelles
… NP4 and NP7. Micelle sizes were determined using dynamic light scattering (DLS). A central composite experimental design was used to quantitatively model reverse micelle size as a function of ω, [NP], and r. The model has demonstrated the capability of predicting the mean diameter of micelles from …
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Interactions of Inorganic Mercury and Inorganic Cadmium with Biomimetic and Complex Biological Membranes and their Influence on Membrane Packing and Size
… using Laurdan Generalized Polarization (GP) and Dynamic Light Scattering (DLS). Hg2+ and Cd2+ electrostatically target and induce rigidity in membranes containing cationic and anionic lipids respectively. Hg2+ also imparts rigidity by acting as a catalyst in the vinyl ether hydrolysis of …
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SYNTHESIS OF NANOCOMPOSITES BY LASER ABLATION
… examined with UV-Visible spectroscopy (UV-Vis), dynamic light scattering (DLS), and transmission electron microscopy (TEM). These techniques showed that the Au nanoparticles in aqueous solutions were highly monodispersed spherical particles with a very narrow size distribution. The particles net …
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Developing silica based Nanocomposites for dental applications using bombyx mori silk
… silk fractions (heavy chain fibroin and light chain fibroin) from natural silk using formic acid. Silk and its fractions were regenerated for use in gelation studies and fabricating nanocomposites by adding silica. The silica was added using, hydrolysed tetraethoxy silane (TEOS) to …
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Dispersion of graphene nanoplatelets in water with surfactant and reinforcement of mortar with graphene nanoplatelets
… the time evolution of particle size with dynamic light scattering (DLS). Ultraviolet-visible spectroscopy (UV-vis) measured the time evolution of the opacity of the suspension. Scanning electron microscopy (SEM) gave a qualitative set of micrographs of the particles taken out of the …
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Probing metal nanoparticles and assemblies with analytical ultracentrifugation
… ligand shell density, shape, and hydrodynamic radius. It can also be used to probe complex mixtures of nanoparticle assemblies, from 2D dimers and chains, to 3D trimers, tetramers, and higher order assemblies, from a consideration of their hydrodynamic shape factor and its relation to …
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Dynamic Light Scattering for the Characterization of Polydisperse Fractal Systems by the Example of Pyrogenic Silica
Dynamic light scattering (DLS) is a method to size submicron particles by measuring their thermal motion (diffusion) in suspensions and emulsions. However, the validity of the Stokes-Einstein equation that relates the diffusion coefficient and the particle size is limited to spherical particles and …
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Fabrication and characterization of nano-engineered membranes for oil-water separation
… have no measurable water content by microscopy, dynamic light scattering (DLS) and differential scanning calorimetry (DSC). To extend this work, a method for fabricating an asymmetric polysulfone membranes is presented. The polysulfone membrane has the feature of allowing much higher flow rates …
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Interactions of functionalized vesicles in the presence of Europium (III) Chloride
… two ß-diketone receptors to one Eu3+ ion. Dynamic light scattering (DLS) was used to follow changes in LUV diameter indicated in an increase in vesicle size distribution of on average 20 %. Optical microscopy was employed to visualize the inter-membrane interaction measured using DLS and …
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Raft Polymerization Of Ph-Responsive, Diblock Copolymers For Nucleic Acid Delivery Vehicles
… included gel permeation chromatography (GPC), dynamic light scattering (DLS), electrophoresis, and in vitro gene expression and toxicity studies. As a result from this study, our findings indicate the significance of cationic group functionalization on siRNA delivery, and the pH-responsive …
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Crystal engineering, Bio Pharmaceutics and Cell biology of active pharmaceutical ingredient (drug) nanoparticles. Formation and cell interaction of hydrocortisone and prednisolone nanoparticles.
… charge as indicated by ¿-potential values. Dynamic light scattering (DLS) and transmission electron microscope (TEM) techniques were used to characterize the prepared nanoparticles. Powder X-ray diffraction (PXRD) and differential scanning calorimetry (DSC) were also used to characterize …
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Study of Semiconducting Nanomaterials: Photoelectrochemistry and Dynamic Light Scattering
… behavior has been described with respect to dynamic light scattering (DLS) measurements. In our system, we studied electron transfer across the semiconductor (SC) electrode and electrolyte interface. The application of ZnO and TiO2 nanomaterials in dye-sensitized solar cells is the motivation …
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A Fluorescence Correlation Spectroscopy Study of the Cryoprotective Mechanism of Glucose on Hemocyanin
… scheme, one would expect an increase in the hydrodynamic radius with increasing sugar concentration. In order to test this hypothesis, two-photon fluorescence correlation spectroscopy (FCS) was used to measure the hydrodynamic radius of hemocyanin (Hc), an oxygen-carrying protein found in …
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Visualization, Characterization, and Analysis of Gold Nanoparticles Fate and Transport in Aqueous Porous Media Environment with Advanced Photonics Technique
… a model nanomaterial to investigate the fate and dynamics of nanoparticles in the complex water environment. A column study was performed to examine the fate and transport of gold nanoparticles with two different coatings in porous media. The resulting data suggested that gold nanoparticles …
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Gadolinium Endohedral Metallofullerenes for Future Magnetic Resonance Imaging Contrast Agents
… IR, X-ray photoelectron spectroscopy (XPS) and dynamic light scattering (DLS). In addition, relaxivity data were obtained for the two metallofullerenes, and the results showed that Gd3N@C84 metallofullerenol had enhanced relaxivity compared to Gd3N@C80 metallofullerenol. This result is …
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The impact of variation in freezing and thawing process parameters on the critical quality attributes of a monoclonal antibody
… the polydispersity index (PdI), as measured by dynamic light scattering (DLS).
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Mechanistic approaches towards understanding particle formation in biopharmaceutical formations. The role of sufactant type and level on protein conformational stability, as assessed by calorimetry, and on protein size stability as assessed by dynamic light scattering, micro flow imaging and HIAC
… and on protein size stability as assessed by Dynamic Light Scattering (DLS), HIAC and MFI. BSA and IgG2 were used as model proteins. Thermal unfolding experiments indicated a very weak surfactant-immunoglobulin IgG2 interaction, compared to much stronger interactions for the BSA surfactant …
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Spectral and Physicochemical Characteristics of nC60 in Aqueous Solutions
… The properties of nC₆₀ were characterized using dynamic light scattering (DLS), transmission electron microscopy (TEM), and UV-Vis spectroscopy. nC₆₀ produced in the presence of carboxylate differs from that produced in water alone (aq/nC₆₀) with respect to surface charge, average particle size, …
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Studies fo the microstructure of self-assembling peptides : effects of chemical cross-linking and growth characterization
… filaments grow. Through a combination of AFM and dynamic light scattering we are able to characterize peptide growth quickly and easily. Dynamic light scattering (DLS) provides a single and convenient means to follow peptide filament growth with time.
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Thermoresponsive Glycopolymers via Controlled Radical Polymerization (RAFT) for Biomolecular Recognition
… resonance spectroscopy (NMR), ultraviolet (UV), dynamic light scattering (DLS, detection of aggregation behaviour) and gel permeation chromatography (GPC). Polymer films were investigated by ellipsometry, X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM) regarding their …
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