This invention provides a method for creating a large-scale of amphiphilic particles. The method includes: adding nanoparticles into a polycarbonate-based solution, adding a surfactant into the solution while performing ultra-sonication to generate polymer precipitation, creating at least one microsphere with the nanoparticles embedded onto it, subjecting the exposed hemisphere of the embedded nanoparticles to a further amphiphilic particles related modification, and dissolving the at least one microsphere in a polycarbonate-based solution in order to free said embedded nanoparticles from the at least one microsphere.

Methods and systems for optical effects in pigments, inks, and on media. One aspect of this disclosure involves a pigment particle which includes a core, having a fluorescent material and having a spherical shape, and a shell surrounding the core; the shell includes a photochromic material which has a first optical property in a first light source and a second optical property in a second light source which includes a set of wavelengths not sufficiently present in the first light source. The second optical property attenuates an emitted radiation from the fluorescent material. Other aspects are also described.

The invention concerns a continuous flow process for manufacturing surface modified metal oxide nanoparticles by supercritical solvothermal synthesis in an reaction medium flowing within a continuous flow chamber, said continuous flow chamber containing a hydrolysis area and a supercritical area, said process comprising the introduction of a flow of metal oxide precursor into the continuous flow chamber at a point P located in the hydrolysis area or in the supercritical area, and the introduction of a flow of is located downstream of P1 with respect to the flow direction, as well as the device for carrying out this process.

A composition for forming a transparent coating film including hollow silica microparticles and a binder is provided. The hollow silica microparticles have an average particle diameter of 5 to 300 nm when measured by the dynamic light scattering method, a specific surface area of 50 to 1500 m.sup.2/g, and an outer shell in which cavities are formed. The microparticles lose weight by 1.0 W % or more at a temperature in the range of from 200° C. to 500° C. when measured by the thermogravimetry (TG). A surface charge (QA) of the hollow silica microparticles contained in the compositions for forming a transparent coating film is in the range from 5 to 20 μeq/g.

A biocompatible hydrogel hybrid material useful in regenerative medicine, in particular in reconstruction of bone tissue.and a method of its preparation is disclosed,

A film for absorbing visible light, including: a plurality of silica nanoparticles, wherein a surface of at least a part of the plurality of silica nanoparticles is functionalized with a plurality of pigment molecules of a Melanin type compound.

Disclosed are surface-treated inorganic particles including inorganic particles and a metal-organic framework bound to the surface of the inorganic particles, wherein catechins form a skeleton of the metal-organic framework, a method of manufacturing the inorganic particles, a dispersion solution in which the inorganic particles are dispersed, and a cosmetic composition including the inorganic particles or the dispersion solution.

The present invention relates to spherical, dense micrometre-sized particles comprising colourants. The invention also relates to a material comprising these particles intended for use in papermaking, paint, agri-food, cosmetics or pharmaceuticals. It also relates to the process for preparing these particles and their incorporation in a matrix.

A coated pigment is used which includes a base of which at least the surface is composed of a light-transmitting material; and a magnetite layer coating the base, and having a crystal lattice constant of not less than 8.35 Å. At least one selected from the group consisting of silica, alumina, glass, mica and a resin is usable as the light-transmitting material.

The invention relates to a novel process for preparing a precipitated silica, in which: a silicate is reacted with an acidifying agent, so as to obtain a suspension of precipitated silica, said suspension of precipitated silica is filtered, so as to obtain a filter cake, said filter cake is subjected to a liquefaction operation comprising the addition of an aluminum compound, after the liquefaction operation, a drying step is performed, characterized in that at least one polycarboxylic acid is added to the filter cake, during or after the liquefaction operation. The invention also relates to novel precipitated silicas and to uses thereof.