摘要:
The disclosure relates to core-shell nanoparticle, the nanoparticle comprising a core being one or more selected from vaterite, proto-vaterite, and amorphous calcium carbonate as determined by X-Ray diffraction, remarkable in that the nanoparticle further comprises a shell of polyphenol, wherein said polyphenol is selected to be insoluble in water, to show a pH ranging from 5 to 9 when measured in a solution of one or more polar solvents and water at a concentration of 10 wt.% based on the total weight of said solution and wherein said polyphenol is at least partially soluble in said one or more polar solvents. A method for forming such nanoparticle as well as their use and the use of polyphenol as shell of shell-core nanoparticle is also described.
摘要:
The invention is directed to a method for producing a gas sensor (2) comprising a step of providing a substrate (4) with two coplanar electrodes (6) and a step of forming a ZnO nanowires network (8) on said two electrodes (6). The step of forming a ZnO nanowires network (8) on said two electrodes (6) is performed as follows: synthesizing ZnO nanowires with a liquid phase sequential growth method; dispersing said synthetized nanowires in a solvent; drop casting the solution containing the solvent and the ZnO nanowires on the electrodes; drying the solution at a temperature inferior to 85°C. The invention is also directed to a gas sensor working at low temperature such as room temperature.
摘要:
The invention is directed to a method for manufacturing a negatively charged supported lipid bilayer. Said method comprises the steps of preparing a formulation comprising at least three lipids (1,2-dioleoyl-sn-glycero-3-phospho-L- serine (DOPS), cholesterol and at least one lipid different from DOPS and cholesterol) dissolved in a first solvent, of evaporating said first solvent, of adding an aqueous formulation of mesoporous silica nanoparticles, of performing an ultra- sonication and of performing a centrifugation. Said method is remarkable in that the number of equivalents of cholesterol relative to one equivalent of DOPS is comprised between 2.30 and 2.70. The invention is further directed to negatively charged supported lipid bilayer on a mesoporous silica nanoparticle comprising cholesterol, 1,2-dioleoyl-sn-glycero-3-phospho-L-serine (DOPS) and at least one lipid different from DOPS and cholesterol.
摘要:
The disclosure relates to lipid-coated calcium carbonate nanoparticles, said nanoparticles comprising an outer layer and a core being calcium carbonate nanoparticle, wherein said core is vaterite, proto-vaterite, or amorphous calcium carbonate as determined by X-Ray diffraction, wherein said core is at least partially coated with one or more amphiphilic compounds eachhaving one hydrophilic head and at least one hydrophobic tail, remarkable in that the hydrophilic heads are negatively charged and form the outer layer of the nanoparticles, in that the nanoparticles have a surface charge having a zeta-potential below 0 mV as determined bymicro-electrophoretic light scattering technology and in that said one or more amphiphilic compounds are PEG-free. The disclosure also relates to methods for forming suchnanoparticles, for modulating the electrical charge of such nanoparticles as well as to the uses of such nanoparticles.
摘要:
The disclosure relates to a method for manufacturing a colloidal dispersion of Kraft lignin (KL) nanoparticles, said method comprising the steps of (a) providing KL; (b) dissolving said KL into a solvent, to obtain a solution having a concentration of Kraft lignin of at least 15 mg/ml; and (c) mixing said solution with an antisolvent under mixing conditions, to provide a colloidal dispersion of nanoparticles. Said method is remarkable in that the solvent used in step (b) of dissolving said KL is one or more organic solvents, and in that step (c) of mixing is performed by the addition of the solution of step (b) into an antisolvent being or comprising water. The disclosure also relates to spherical KL nanoparticles with an average diameter size ranging from 9 nm up to 70 nm. The disclosure further relates to various uses of said spherical KL nanoparticle.
摘要:
The invention is directed to a method for self-assembling a mesoporous silica nanoparticle. Said method comprises the step of condensing a silica precursor, a surfactant and a condensation agent in a solvent. Then, the addition of an organotriethoxysilane is performed. Finally, there is the step of removing said surfactant. Said method is remarkable in that the portion of said organotriethoxysilane to said silica precursor is comprised between 5% and 15%. The invention is further directed to a self-assembled mesoporous silica nanoparticle comprising at least one silica precursor and an organotriethoxysilane.
摘要:
According to the present invention, an implantable device comprising an electrode for carrying an electric signal to or from a biological cell or tissue provided. The electrode material is chosen to exhibit desirable properties in terms of electrical conductivity, biocompatibility and bio-fouling. The invention further provides implantable devices comprising such implantable electrodes.
摘要:
The invention is directed to a method for manufacturing mesoporous silica nanoparticles with encapsulated superparamagnetic clusters, said method comprising the nudeation of superparamagnetic particles and the condensation of silica in order to wrap those superparamagnetic particles. The control of the number of superparamagnetic clusters is regulated by the addition of the cationic surfactant. Methods for encapsulating said nanoparticles with a negatively charged supported lipid bilayer and with an additional outer layer are also described.
摘要:
The invention is directed to a method for manufacturing supported lipid bilayer on a porous silica nanoparticle with a ζ-potential comprised between -10 mV and +10 mV, said method comprising the steps of (a) providing a negatively charged supported lipid bilayer on a porous silica nanoparticle, wherein said negatively charged supported lipid bilayer has a ζ-potential inferior to -15 mV and wherein said negatively charged supported lipid bilayer comprised at least one phospholipid and; (b) adding a formulation of lipids, said lipids being 1,2-dioleoyl-3-trimethylammonium-propane alias DOTAP, cholesterol and at least one lipid different from DOTAP and cholesterol. Said method is remarkable in that it further comprises the step of (c) performing an ultra-sonication for promoting DOTAP incorporation. Said method can be supplemented by the step of addition of alginate and the step of cross-linking said alginate. The invention is also directed to nanocapsule and composition comprising said nanocapsule.
摘要:
According to the present invention, an implantable device is provided, comprising a substrate on which at least one surface portion is provided. The chemical composition of the surface portion selectively enhances the cell-adhesion to the substrate.