Fabrication of antireflective hierarchical TiO2 nanostructures by moth-eye patterning of anodic anodized nanotubes | Zendy

Yunha Ryu | Zendy; Kyoungsik Kim | Zendy

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Fabrication of antireflective hierarchical TiO₂ nanostructures by moth-eye patterning of anodic anodized nanotubes

Author(s) -

Yunha Ryu,

Kyoungsik Kim

Publication year - 2018

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.26.031490

Subject(s) - materials science , fabrication , anodizing , nanostructure , nanotechnology , refractive index , surface plasmon resonance , plasmon , optoelectronics , anti reflective coating , etching (microfabrication) , nanotube , lithography , optics , layer (electronics) , nanoparticle , carbon nanotube , composite material , physics , pathology , medicine , aluminium , alternative medicine

Herein, we report the fabrication and characterization of a hierarchical TiO 2 structure that exhibits reduced surface reflection. The hierarchical structure, which is a moth-eye-shaped array containing nanotubes, was fabricated by dry-etching a TiO 2 nanotube layer, by using colloidal lithography. The fabricated structure shows a reduced reflectance, compared with that of non-patterned TiO 2 nanotubes. This is because of the graded refractive index of the moth-eye pattern. Furthermore, we investigated the optical properties of gold-decorated moth-eye TiO 2 nanotubes and found that the absorption, which was caused by the plasmonic resonance of gold nanostructures, was further enhanced by coupling with the light-trapping effect.

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