Particle coating by atomic layer deposition

A method for producing coated particles by atomic layer deposition, comprising the steps of:

• a) dispersing particles having reactive groups on their surface in an organic solvent,
• b) adding a first reactant in excess to the reactive groups on the surface of the particles,
• c) mixing the dispersion to react the first reactant with reactive groups on the surface of the particles,
• d) removing the excess of the first reactant by vacuum or by distillation or by azeotropic distillation,
• e) adding a second reactant in excess to the reactive groups on the surface obtained in step d),
• f) mixing the dispersion to react the second reactant with the first reactant on the surface of the particles,
• g) removing the excess of the second reactant by vacuum or by distillation or by azeotropic distillation,
• wherein,
• the organic solvent has a boiling point that is both at least 10° C. higher than the boiling point of the first reactant and at least 10° C. higher than the boiling point of the second reactant thus allowing the removal of the excess of the first reactant and the second reactant by vacuum or by distillation or by azeotropic distillation.