Anodization of sputtered substoichiometric aluminum oxide thin-films for improved nanorod array fabrication

Plasmonic Biosensor Based on Vertical Arrays of Gold Nanoantennas

“…We propose to use vertically aligned gold nanoantenna arrays with a diameter of 17 nm and a length of 400 nm, fabricated using alumina templates . The method of anodic oxidation of aluminum films itself was already known and used industrially since the beginning of the previous century; however, it was only with the emergence of modern nanoscopic imaging techniques, that its self-ordering properties of nanopores and, thus, the full potential for the upcoming nanotechnology was discovered. − It allows for the production of large scale (up to several cm 2 ), uniform, defect poor, and densely packed nanostructure arrays, even on flexible substrates . Variations in length, diameter, and distance assured, thanks to the diversity of the available templates, a broad tuning of the optical resonance properties.…”