Blue photoluminescence from active carboxyl adatoms on nanoporous anodic alumina films.

ABSTRACT: Nanoporous anodic alumina (nPAA) films formed on aluminum in lower aliphatic carboxylic acids exhibit blue self-coloring and characteristic properties such as photoluminescence (PL), electroluminescence, and electron spin resonance. The blue colors are seemingly originated from the adsorbed radicals incorporating into the oxide during the aluminum anodization. However, there is lack of reports revealing the detailed activation mechanism of the adatoms in the complexes. This study investigates the blue PL and its correlation with the atomic and electronic structures of the active aluminum surface using multiple theoretical and experimental methods. The results show that the concentration of carboxylates at the nPAA surface is highly correlated with the blue colorization and manifest that un

SUBMITTER: Cho SY 

PROVIDER: S-EPMC11754588 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature