Hair removal with metal nanoparticles in surfactant containing solutions

摘要

Treatment of skin tissue with photoactive materials and light, such as nanoparticles and formulations which are useful for cosmetic, diagnostic and therapeutic applications to mammals such as humans. In particular, embodiments of hair removal with metal nanoparticles in surfactant containing solutions are disclosed.

主权项

1. A method of localizing thermal damage to a hair follicle with a surfactant composition, comprising:
topically applying a composition comprising a surfactant and nanoparticles to a skin surface; wherein the nanoparticles have at least one peak absorption wavelength selected from the group consisting of: 755 nm, 800-810 nm, and 1064 nm, wherein the nanoparticles have a concentration of 109 to 1016 particles per ml of the composition, wherein the nanoparticles comprise a conductive metal portion comprising at least one of gold, silver, and platinum, wherein the nanoparticles comprise a coating that coats the conductive metal portion; wherein the nanoparticles are unassembled, targeting a hair follicle by redistributing a portion of the composition of nanoparticles from the skin surface to the hair follicle while a remaining portion of the composition is left on the skin surface; removing the remaining portion of the composition from the skin surface while leaving the composition localized within the hair follicle; and irradiating the composition of nanoparticles with an energy source to induce a surface plasmon in said nanoparticles, thereby localizing thermal damage to said hair follicle.