(b) the silica particles exhibit a moisture absorption of 0.25 mg/mor less at 50% relative humidity, and a refractive index, as determined through the liquid immersion method, of 1.450 to 1.460; and (c) the silica particles have a mean primary particle size, derived from a specific surface...
The choice of conventional particle-based stationary phases for (bio)chromatography is vast and details cannot be given here. Table IV attempts to group the main types of stationary phases into categories, such as inorganic and organic (polymeric) materials, which may be of natural or (semi)synt...
This paper presents measurements of the refractive index of a hygroscopic silica aerogel block at several wavelengths. The measurements, performed with a monochromator, have been compared with different parameterisations for n(λ), in order to determine the best chromaticity law for the aerogel. Thi...
F doping was effective to decrease both the refractive index and the dispersion. The dependence of refractive index on F content was represented as a formula of Δn/n = -0.31c and the dependence of its dispersion was determined as ΔD/D = -1.47c at 250 nm where c is the concentration...
refractive indexn20/D1.544(lit.) storage temp.2-8°C solubilityinsoluble in H2O, acid solutions; soluble in HF formtablets (~0.5 g each) colorcolorless hexagonal, hexane crystals, crystalline crystal systemsquare Space groupP42212 Lattice constant ...
The fine mesoporous silica particles are obtained by the method described above, and preferably have a particle diameter of 100 nm or less. They can thus be easily incorporated into a device structure requiring a low refractive index (Low-n), low dielectric constant (Low-k) and low thermal ...
Refractive index:1.46Volume resistivity,Ω-cm: 1013 MORPHOLOGY Particle shape:sphericalCrystal structure:amorphousPorosity:non-porous Particle size primary,nm: 5-40Oil absorption, g/100 g: 100-330Appearance:fluffy white powder Density of silanol groups, 1/nm2: 1.5-4.5Aggregate size, μm: 0.2-15...
The average effective density for the range 40–200 nm measured with an aerosol particle mass analyzer (APM) was 1.9 g/cm. The real component of the refractive index measured with an optical particle counter (OPC) was 1.41 at a wavelength of 633 nm. All properties (size, effective density...
'Liquid marbles' on the surface of the water pool immediately disintegrated upon addition of acid to the pool, because the weakly alkaline nature of the particle surface confers pH-responsive behavior. In order to widen the application range of liquid marbles, it is important to develop pH-...
Nanosized silica size standards produced with a sol-gel synthesis process were evaluated for particle size, effective density, and refractive index in this study. Particle size and effective density measurements were conducted following protocol from the National Institute of Advanced Industrial Science an...