A Strategy towards Light-Absorbing Coatings Based on Optically Black Nanoporous Alumina with Tailored Disorder.

ABSTRACT: This work provides a conceptually new way of thinking about the light-absorbing mechanism in additive-free black porous anodic alumina (black PAA, or b-PAA) layers obtained via "burning" anodizing regime. The new insight into the controllable photonic effects in PAA allows the implementation of the optical blackening method based on the deliberate randomization of the initially well-ordered nanopore arrangement. The proposed black coloration mechanism rests solely on the destructive interference of light after its multiple scattering. Similar effects have been earlier considered for some natural or artificially created biomimetic structures (e.g., the so-called "moth eye effect", or the coloration mechanism in the Neurothemis tullia dragonfly wings). Comprehensive analysis confirmed that t

SUBMITTER: Pashchanka M 

PROVIDER: S-EPMC8510353 | biostudies-literature | 2021 Oct

REPOSITORIES: biostudies-literature