Antireflection film bio-mimicking the corneal nipple array strcuture of moth eye

초록

Antireflection film has been used to reduce the reflectivity at the surface, thus ensuring the increased transmittance of visible light. By reducing the surface reflectivity, the image on the various display units such as TV and computer monitors become clearer and eye fatigue and vision problem can be reduced. The corneal nipple array structure of many moth eyes has been attributed to the main contributing factor for reduced surface reflectivity. The cornea of moth eye is covered with the nano-sized dots (nipples) arranged usually in the hexagonally packed order. Many studies have been carried out to generate nano-sized structure on various surfaces to bio-mimic the cornea of moth eye and reduced surface reflectivity has been observed with those structures. In this work, new process using nano-porous aluminum oxide template has been developed to fabricate the surface nanostructures such as nanodots and nanobrushes on polymer films. The structure parameters can be controlled by tailoring the process conditions. The effect of the nanostructure on the polymer surface on the reflectivity has been tested and the correlation of the detained structure parameters with the surface reflectivity will be discussed. It was found that the surface reflectivity can be minimized by forming nanostructure with the process developed in the work. The experimental observation will be compared with the theoretically calculated results.