title: Tailored surface engineering of pigments by layer-by-layer coating.
abstract: We have evaluated the feasibility of layer-by-layer encapsulation technology for the improvement of dye pigments used for tattoos or permanent make-up. The formation of core-shell structures is possible by coating pigments with thin films of several different polyelectrolytes using this technology. The physicochemical surface properties, such as charge density and chemical functionality, can be reproducibly varied in a wide range. Tailoring the surface properties independently from the pigment core allows one to control the rheological behaviour of pigment suspensions, to prevent aggregation between different pigments, to reduce the cytotoxicity, and to influence the response of phagocytes in order to have similar or the same uptake and bioclearance for all pigments. These properties determine the durability and colour tone stability of tattoos and permanent make-up.
authors.affiliation: Surflay Nanotec GmbH, Berlin, Germany.
authors.forename: Lars
authors.initials: L
authors.lastname: Dähne
authors.forename: Julia
authors.initials: J
authors.lastname: Schneider
authors.forename: Dirk
authors.initials: D
authors.lastname: Lewe
authors.forename: Henrik
authors.initials: H
authors.lastname: Petersen
mesh_terms: D002478:Cells, Cultured; D020099:Coated Materials, Biocompatible; D004396:Coloring Agents / Q000009:adverse effects / Q000138:chemical synthesis* / Q000737:chemistry; D003601:Cytotoxicity Tests, Immunologic; D004573:Electrolytes / Q000737:chemistry*; D006801:Humans; D007281:Ink; D010586:Phagocytes; D011073:Polyamines / Q000737:chemistry; D000071228:Polyelectrolytes; D011108:Polymers / Q000737:chemistry; D011137:Polystyrenes / Q000737:chemistry; D012212:Rheology; D013499:Surface Properties; D013653:Tattooing
chemical_list: D020099:Coated Materials, Biocompatible; D004396:Coloring Agents; D004573:Electrolytes; D011073:Polyamines; D000071228:Polyelectrolytes; D011108:Polymers; D011137:Polystyrenes; C063994:polyallylamine; C003321:polystyrene sulfonic acid