scholarly journals Anisotropic silica colloids for light scattering

2021 ◽  
Author(s):  
Gianni Jacucci ◽  
Brooke W. Longbottom ◽  
Christopher C. Parkins ◽  
Stefan A. F. Bon ◽  
Silvia Vignolini
Keyword(s):  
Light Scattering ◽  
Silica Particles ◽  
Silica Colloids

Anisotropic silica particles were used as model scattering enhancers and directly compared to their spherical counterparts. Furthermore, silica rods were assembled into micron-sized scattering particles. This allows for use in pigment formulations.

Light Scattering of Ultrafine Silica Particles by VUV Synchrotron Radiation

Nano Letters ◽  
2005 ◽  
Vol 5 (6) ◽  
pp. 1009-1015 ◽  
Author(s):  
Jinian Shu ◽  
Kevin R. Wilson ◽  
Alan N. Arrowsmith ◽  
Musahid Ahmed ◽  
Stephen R. Leone
Keyword(s):  
Light Scattering ◽  
Synchrotron Radiation ◽  
Silica Particles ◽  
Ultrafine Silica

A Study of Particle Growth Using Light Scattering and Local Sampling in Flame Synthesis of Nano Particles

1999 ◽  
Author(s):  
Jaegeol Cho ◽  
Jeonghoon Lee ◽  
Hyun W. Kim ◽  
Mansoo Choi
Keyword(s):  
Light Scattering ◽  
Gas Flow ◽  
Diffusion Flames ◽  
Particle Growth ◽  
Silica Particles ◽  
Nano Particles ◽  
Spherical Particles ◽  
Carrier Gas ◽  
Radial Heat ◽  
Local Sampling

Abstract The growth of silica particles in coflow diffusion flames has been studied experimentally using light scattering and local thermophoretic sampling techniques. The number densities and volume fractions of both aggregates and spherical particles have been determined calculated by a novel method of using the scattering cross section measured from 90° light scattering with the combination of particle sizes and morphology measured from the localized sampling and TEM image analysis under the assumption of monodisperse distribution of primary particles in an aggregate. Rayleigh-Debye-Gans and Mie theories have been applied to the calculations for fractal aggregates and spherical particles, respectively. Of particular interests are the effects of carrier gas flow rates on the evolution of silica particles and the roles of radial heat and H2O diffusion have been studied when using N2 or O2 as a carrier gas.

Preparation and Processing of Monodisperse Colloidal Silica-Cadmium sulfide nanocomposites

1994 ◽  
Vol 346 ◽  
Author(s):  
Song-Yuan Chang ◽  
Lei Liu ◽  
Sanford A. Asher
Keyword(s):  
Cadmium Sulfide ◽  
Surface Area ◽  
Colloidal Silica ◽  
High Surface ◽  
High Surface Area ◽  
Reaction Medium ◽  
Silica Particles ◽  
Linear Optics ◽  
Silica Colloids ◽  
Monodisperse Colloidal Silica

ABSTRACTA novel synthetic methodology has been developed for preparing monodisperse colloidal silica-cadmium sulfide nanocomposite spheres in the 50 – 300 nm size regime. This methodology uses water-in-oil microemulsions as the reaction medium. Monosize silica colloids are first produced by the controlled hydrolysis of tetraethyl orthosilicate in the micro water droplets of the microemulsion. Cadmium sulfide quantum dots are incorporated into the silica colloids during synthesis by the introductions of Cd2+ and S2- microemulsions. Various morphologies of the nanocomposite are fabricated by controlling the heterogeneous coagulation of CdS and SiO2. Unique high surface area silica particles can be prepared when nitric acid etches out the CdS and leaves behind topologically defined voids. The CdS nanocomposites are new materials useful for non-linear optics, while the high surface area silica particles should have novel applications in areas such as catalysis.

Dynamic light scattering studies of the stability and growth of silica particles

1993 ◽  
Vol 159 (1-2) ◽  
pp. 73-79 ◽  
Author(s):  
Rogelio Rodríguez ◽  
Rubén Arroyo ◽  
Pastora Salinas
Keyword(s):  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Silica Particles ◽  
The Stability
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