Self-assembled nano-heterostructural thin film for optical lens

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  • Self assembled nano heterostructural thin film for optical lens

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<jats:p>The layer-by-layer (LBL) self-assembly method enables the deposition of functional nanoscale multilayer thin films on intricate-shape substrates. The present problem with optical devices is the formation of a uniform coating of a nanoscale heterostructural thin film on both faces of the lens. In this paper, we introduce self-assembled heterostructural optical films with higher- and lower-refractive index layers, which were fabricated using a stable water base titanium complex [titanium(IV) bis(ammonium lactato) dihydroxide (TALH)] and cationic and anionic polyelectrolytes [poly(diallyldimethylammonium chloride) (PDDA)] and [poly(acrylic acid) (PAA)] on a lens via the LBL method. The antireflectance characteristics of (PDDA/TALH)<jats:sub>20</jats:sub>/(PDDA/PAA)<jats:sub>20</jats:sub>showed a maximum transmittance of 99.2% with (PDDA/TALH)<jats:sub>20</jats:sub>(<jats:italic>ca.</jats:italic>1.75, 80 nm) and (PDDA/PAA)<jats:sub>20</jats:sub>(<jats:italic>ca.</jats:italic>1.48, 87 nm) on both faces of the lens. These results demonstrate that we can control the refractive index and film thickness of self-assembled nano-heterostructural films on optical lenses.</jats:p>

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