LIPSS?Sticks: Laser Induced Double Self Organization Enhances the Broadband Light Absorption of TiO ₂ Nanotube Arrays

Sub-wavelength laser-induced periodic surface structures (LIPSS) created by ultrashort pulsed laser irradiation on the of titanium are used for first time to template electrochemical growth dioxide nanotube arrays, creating a combined structure we term LIPSS-Sticks. This is an example double self-organized process, as both LIPSS formation and anodization involve spontaneous generation order from initially nonordered precursors. LIPSS-Sticks have 2× greater visible near-infrared light (400–1400 nm) collection efficiency compared with flat due enhanced scattering grating-like structures. The nanostructures modeled electrostatically explain features templated process that differ usual surfaces. new method using two complementary fabrication techniques general can also be applied Cu, W, Fe, Al oxide