Some applications of light scattering in materials science

Holoubek, Jaroslav

doi:10.1016/j.jqsrt.2007.01.013

Cited by 36 publications

(3 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, by fitting the experimental magnetization curve to Langevin function, particle number mean solid radius and polydispersity can be estimated 10, 11. Dynamic light scattering (DLS) allows determination of the diffusion coefficient of colloidal particles which in turn gives access to particle z ‐average hydrodynamic radius and polydispersity 12, 13. Micro‐electrophoresis and laser Doppler velocimetry (LDV) are applied for measuring electrophoretic mobilities which can be converted into ζ‐potentials applying the appropriate model (Henry, Hückel, Smoluchowski, etc. )…”

Section: Introductionmentioning

confidence: 99%

Charge‐based characterization of nanometric cationic bifunctional maghemite/silica core/shell particles by capillary zone electrophoresis

d’Orlyé

Varenne

Georgelin³

et al. 2009

Electrophoresis

View full text Add to dashboard Cite

In view of employing functionalized nanoparticles (NPs) in the context of an immunodiagnostic, aminated maghemite/silica core/shell particles were synthesized so as to be further coated with an antibody or an antigen via the amino groups at their surface. Different functionalization rates were obtained by coating these maghemite/silica core/shell particles with 3-(aminopropyl)triethoxysilane and 2-[methoxy(polyethyleneoxy)propyl]-trimethoxysilane at different molar ratios. Adequate analytical performances with CE coupled with UV-visible detection were obtained through semi-permanent capillary coating with didodecyldimethyl-ammonium bromide, thus preventing particle adsorption. First, the influence of experimental conditions such as electric field strength, injected particle amount as well as electrolyte ionic strength and pH, was evaluated. A charge-dependent electrophoretic mobility was evidenced and the separation selectivity was tuned according to electrolyte ionic strength and pH. The best resolutions were obtained at pH 8.0, high ionic strength (ca. 100 mM), and low total particle volume fraction (ca. 0.055%), thus eliminating interference effects between different particle populations in mixtures. A protocol derived from Kaiser's original description was performed for quantitation of the primary amino groups attached onto the NP surface. Thereafter a correlation between particle electrophoretic mobility and the density of amino groups at their surface was established. Eventually, CE proved to be an easy, fast, and reliable method for the determination of NP effective surface charge density.

show abstract

Section: Introductionmentioning

confidence: 99%

Charge‐based characterization of nanometric cationic bifunctional maghemite/silica core/shell particles by capillary zone electrophoresis

d’Orlyé

Varenne

Georgelin³

et al. 2009

Electrophoresis

View full text Add to dashboard Cite

show abstract

“…To characterize colloidal, protein, and polymer structures as well as nanostructured materials the usage of light scattering techniques can be considered as well-established. − The method of dynamic light scattering (abbreviated as DLS), further known as quasi-elastic light scattering or photon correlation spectroscopy, particularly is used to determine size and size distributions of nanoparticles as well as to indicate present shape anisotropies for such systems . Note that here one actually defines the hydrodynamic radius R H , which represents the dimension of a hypothetical hard sphere that diffuses with the same speed as the analyzed particles …”

Section: Methodsmentioning

confidence: 99%

Shape, Size, and Internal Dynamics of Loosely Bound Colloidlike Ionic Clusters in Ternary Solvent Systems

2019

View full text Add to dashboard Cite

We characterize the influence of preferential solvation on the dynamic self-assembly process between small dianionic salts and a macrocyclic tetraimidazolium molecular box into highly defined, colloidlike ionic clusters in solution, called ionoids. Here, we substitute individual solvents in the established optimal ternary solvent mixture dimethyl sulfoxide (DMSO)/glycerol/water 50:43:7 (v/v/v), namely, DMSO through dimethyl formamide, glycerol through ethylene glycol and water through N-methylpropionamide, and such can characterize the changes in shape and size of the structures of loosely bound ionic clusters induced by the substitution of a specific solvent component. Using dynamic light scattering we associate size, shape, and initial durability of ionic clusters with solvent parameters like dynamic viscosity and relative permittivity to highlight the importance of solvent composition for the build-up of globular ionoids as well as anisotropic ionic clusters. To further analyze the solvation state of our dianionic building unit inside the initial ion cloud state, which later affects the self-assembly process of ionic clusters, we perform continuous wave (CW) electron paramagnetic resonance spectroscopy measurements at X-band (∼9.4 GHz) and Q-band (∼34 GHz) frequencies.

show abstract

“…Thus, the plasmonic nanoparticles are used in Surface enhanced Reman Spectroscopy (SERS), which is a powerful method for detecting tumors and cancers cells in alive body [ 5 , 8 , 9 , 10 , 11 , 12 ]. For the material science applications, the light scattering plays a significant rule to measure the morphology and the characterizations of the materials [ 13 ]. There are many devices uses this technology such as the Light Scattering Spectroscopy (LSS) to measure the spectral power density of the material surface [ 14 ], the Phase Analysis Light Scattering (PALS) measures the motilities of the colloidal particles [ 13 , 15 ], the Laser Doppler Anemometry (LDA) to investigate the dynamic fluid [ 16 ], the Forced Rayleigh Scattering (FRS) to measure the diffusion of the materials [ 17 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

Decay Rates of Plasmonic Elliptical Nanostructures via Effective Medium Theory

et al. 2021

View full text Add to dashboard Cite

This paper investigates the spontaneous decay rate of elliptical plasmonic nanostructures. The refractive index was analyzed using the effective medium theory (EMT). Then, the polarizability, spontaneous radiative, non-radiative decay rate, and electric field enhancement factor were characterized for the targeted elliptical nanostructures at different aspect ratios. All of the optical analyses were analyzed at different distances between the excited fluorescent coupled atom and the plasmonic nanostructure (down to 100 nm). This work is promising in selecting the optimum elliptical nanostructure according to the required decay rates for optical conversion efficiency control in energy harvesting for solar cells and optical sensing applications.

show abstract

Some applications of light scattering in materials science

Cited by 36 publications

References 42 publications

Charge‐based characterization of nanometric cationic bifunctional maghemite/silica core/shell particles by capillary zone electrophoresis

Charge‐based characterization of nanometric cationic bifunctional maghemite/silica core/shell particles by capillary zone electrophoresis

Shape, Size, and Internal Dynamics of Loosely Bound Colloidlike Ionic Clusters in Ternary Solvent Systems

Decay Rates of Plasmonic Elliptical Nanostructures via Effective Medium Theory

Contact Info

Product

Resources

About