Dynamic Light Scattering

Eiser, Erika

doi:10.1002/9781118683972.ch5

Cited by 8 publications

(4 citation statements)

References 96 publications

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“…For samples with only 0.52 µm particles present we used Differential Dynamic Microscopy (DDM) to extract the particle diffusivities on the ODs and in bulk [21,22]. Similar to the larger particles a considerable reduction in the diffusivity (∼ 2.4 × 10 −13 m 2 s −1 ) of bound colloids is found, while the value D sol ∼ 9.52 × 10 −13 m 2 s −1 measured for the free particles is again similar to the theoretical one (Fig.…”

Section: Particle Tracking Differential Dynamic Microscopy (Ddm) Micr...mentioning

confidence: 99%

“…These tracks were subsequently analysed in Matlab generating mean-squared displacements to calculate the diffusivities. Several bright-field time series of 1-2 minute durations were recorded and evaluated using a Matlab routine for DDM analysis developed by S. H. Nathan [22,41]. In DDM, bright field (or fluorescence) microscope images separated by a given time lag are subtracted such that only the dynamic information due to colloid motion remains.…”

Section: Image Analysis and Diffusivity Measurementsmentioning

confidence: 99%

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Kinetic control of the coverage of oil droplets by DNA-functionalized colloids

et al. 2016

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Section: Particle Tracking Differential Dynamic Microscopy (Ddm) Micr...mentioning

confidence: 99%

Section: Image Analysis and Diffusivity Measurementsmentioning

confidence: 99%

Kinetic control of the coverage of oil droplets by DNA-functionalized colloids

et al. 2016

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“…Hence, there is an unmet need for analytical tools for NPs speciation. Nowadays, the available techniques for NP detection, such as dynamic light scattering, Coulter counters, electrochemical detection by nanoimpact, , electron microscopy, and centrifuge particle size analysis do not provide full speciation ability. Namely, these analytical methods provide information only about the size and concentration of the NPs; however, they do not distinguish between NPs having different shapes and stabilizing shells.…”

Section: Introductionmentioning

confidence: 99%

Electrochemically Deposited Sol–Gel Based Nanoparticle-Imprinted Matrices for the Size-Selective Detection of Gold Nanoparticles

Bruchiel-Spanier

Giordano

Vakahi

et al. 2018

ACS Appl. Nano Mater.

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Nanoparticles imprinted matrices (NAIMs) is a new approach, in which nanoparticles (NPs) are imprinted in a matrix followed by their removal to form highly selective voids that can recognize the original NPs. In this study, the effect of a sol–gel matrix on the imprinting and reuptake of gold nanoparticles (AuNPs) is examined. Specifically, indium tin oxide (ITO) films were modified with a positively charged polymer, on which the negatively charged AuNPs stabilized with citrate (AuNPs-cit) were adsorbed. This was followed by the electrochemical deposition of sol–gel matrices with different thicknesses and functional groups onto the ITO/AuNPs-cit. Electrochemical oxidation dissolved the AuNPs-cit and formed cavities in the sol–gel films, which fit both the size and shape of the AuNPs-cit. Reuptake of these NPs from an aqueous solution was successful using the imprinted films, whereas the non-imprinted films did not re-uptake the AuNPs-cit. Furthermore, the thickness of the sol–gel layers as well as the type of the silanes that were deposited play an important role on the recognition ability of the NAIM. Finally, we found that the NAIMs are selective, and larger AuNPs-cit were not recognized by the imprinted matrix.

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“…Accurate and rapid characterization of the PNPs is critical feedback for controlling their size and morphology during the course of particle development efforts. Historically, particle size distributions of PNPs have been measured by a variety of techniques including hydrodynamic chromatography (HDC), dynamic light scattering (DLS), field flow fractionation (FFF), ultracentrifugation, transmission electron microscopy (TEM), and static multiangle light scattering (MALS) . HDC, FFF, ultracentrifugation, and MALS are not well suited for measurement of the radius of gyration, R g , in the size regime ∼≤10 nm.…”

Section: Introductionmentioning

confidence: 99%

Determination of Particle Size Distributions, Molecular Weight Distributions, Swelling, Conformation, and Morphology of Dilute Suspensions of Cross-Linked Polymeric Nanoparticles via Size-Exclusion Chromatography/Differential Viscometry

et al. 2014

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Size-exclusion chromatography (SEC), coupled with differential viscometry detection (SEC/DV), is applied to the dilute suspension characterization of solvent-swollen cross-linked polymeric nanoparticles (PNPs). Cross-linked, unimolecular polymeric nanoparticles in the 5−50 nm weight-average diameter (d w ) range were prepared by batch and semibatch microemulsion polymerization techniques and isolated. SEC and SEC/DV characterization techniques yield, based on the principle of universal calibration, a wealth of information regarding the structural attributes of PNPs, including apparent and absolute molecular weight distributions, apparent and absolute molecular weight averages, peak and weightaverage particle diameters, particle size distributions in both the solvent-swollen and solvent-free states, particle conformation (shape), and an estimate of the volumetric swell factor. These structural parameters are critical to understanding PNP performance, and all are obtained in a single rapid chromatographic experiment, when conducted under conditions where universal calibration applies. Particle sizes determined under such conditions are in excellent agreement with those obtained by dynamic light scattering, transmission electron microscopy, hydrodynamic chromatography, and SEC/static light scattering (SEC/SLS). In addition, Mark−Houwink exponents of approximately zero were found across the molecular weight and size distribution of many of these tightly cross-linked PNPs, which is consistent with a spherical particle conformation in these dilute suspensions. The SEC/DV methods are especially valuable to characterize the diameter, volume swell factor, and suspension conformation of small (4−5 nm d w ) PNPs.

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Dynamic Light Scattering

Cited by 8 publications

References 96 publications

Kinetic control of the coverage of oil droplets by DNA-functionalized colloids

Kinetic control of the coverage of oil droplets by DNA-functionalized colloids

Electrochemically Deposited Sol–Gel Based Nanoparticle-Imprinted Matrices for the Size-Selective Detection of Gold Nanoparticles

Determination of Particle Size Distributions, Molecular Weight Distributions, Swelling, Conformation, and Morphology of Dilute Suspensions of Cross-Linked Polymeric Nanoparticles via Size-Exclusion Chromatography/Differential Viscometry

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