RT Journal Article
T1 Novel durable broadband absorber with hierarchical nano micro photonic structure
A1 Elshorbagy, Mahmoud H.
A1 Caria, Maria Gil de
A1 Martínez Antón, Juan Carlos
A1 Cuadrado Conde, Alexander
A1 Sánchez Brea, Luis Miguel
A1 Alda Serrano, Javier
AB This study presents an innovative fabrication method that integrates chemical bath etching and anodization to produce a hierarchical nano/micro-structured surface on aluminum substrates. The proposed methodology is simple and uses conventional equipment and chemical components, generating quasi-crystalline nanostructures over a large area of several cm. By successfully anodizing a porous aluminum surface, we combine the beneficial physical properties at both scales: the low density of the rigid porous aluminum structure and the low reflectance of the robust Anodized Aluminum Oxide (AAO) layer. This dual morphology significantly enhances the material’s optical and mechanical performance, resulting in a broadband, highly absorptive, and durable surface. The increase in hardness is linked to the generation of a porous layer through chemical etching, and the reduction in optical reflectivity in the visible and near infrared is mainly caused by the presence of nano-holes produce by anodization. The final sample demonstrates a remarkable improvement in hardness, with a twofold increase in the Vickers hardness number compared to conventional AAO layers, and a threefold increase compared to the porous aluminum layer alone. Additionally, the reflectivity of the fabricated surface is reduced by 25% relative to traditional AAO layers. These findings highlight the potential of this hybrid fabrication technique for applications requiring surfaces with superior light absorption, mechanical durability, and anti-reflective properties, such as in solar energy harvesting, optical devices, and protective coatings.
PB Elsevier
YR 2025
FD 2025-10
LK https://hdl.handle.net/20.500.14352/133379
UL https://hdl.handle.net/20.500.14352/133379
LA eng
NO Elshorbagy, Mahmoud H., et al. «Novel Durable Broadband Absorber with Hierarchical Nano/Micro Photonic Structure». Surfaces and Interfaces, vol. 75, octubre de 2025, p. 107728. DOI.org (Crossref), https://doi.org/10.1016/j.surfin.2025.107728
NO Ministerio de Ciencia e Innovación (España)
DS Docta Complutense
RD 19 mar 2026