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    Single-imprint moth-eye anti-reflective and self-cleaning film with enhanced resistance

    Year: 2018

    Journal: Nanoscale, Volume 10, SEP 7, page 15496–15504

    Authors: Navarro-Baena, Ivan; Jacobo-Martin, Alejandra; Hernandez, Jaime J.; Castro Smirnov, Jose R.; Viela, Felipe; Monclus, Miguel A.; Osorio, Manuel R.; Molina-Aldareguia, Jon M.; Rodriguez, Isabel

    Organizations: European Union's Horizon 2020 Research and Innovation Program [646397]; Ministry of Education and Research of the Madrid Community [PEJ15/IND/AI-0626]; European Social Fund (ESF); Severo Ochoa Programme for Centres of Excellence in RD (MINECO) [SEV-2016-0686]

    Antireflective transparent materials are essential for a myriad of applications to allow for clear vision and efficient light transmission. Despite the advances, efficient and low cost solutions to clean antireflective surfaces have remained elusive. Here, we present a practical approach that enables the production of antireflective polymer surfaces based on moth-eye inspired features incorporating photoinduced self-cleaning properties and enhanced mechanical resistance. The methodology involves the fabrication of sub-wavelength moth-eye nanofeatures onto transparent surface composite films in a combined processing step of nanoparticle coating and surface nanoimprinting. The resulting surfaces reduced the optical reflection losses from values of 9% of typical PMMA plastic films to an optimum value of 0.6% in the case of double-sided moth-eye nanoimprinted films. The composite moth-eye topography also showed an improved stiffness and scratch resistance. This technology represents a significant advancement not limited by scale, for the development of antireflective films for low cost application products.
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