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    Bioinspired antireflective flexible films with optimized mechanical resistance fabricated by roll to roll thermal nanoimprint

    Year: 2021

    Journal: Sci Rep, Volume 11, JAN 28

    Authors: Jacobo-Martin, Alejandra; Rueda, Mario; Hernandez, Jaime J.; Navarro-Baena, Ivan; Monclus, Miguel A.; Molina-Aldareguia, Jon M.; Rodriguez, Isabel

    Organizations: project MADRID-PV2-CM [P2018/EMT-4308]; project MAT4.0-CM [S2018/NMT-4381]; government of the Comunidad de Madrid; Spanish Ministry of Science and Innovation through project BiSURE [DPI2017-90058-R]; 'Severo Ochoa' Programme for Centres of Excellence in RD (MINECO) [SEV-2016-0686]; 'Maria de Maeztu' Programme for Groups of Excellence (MINECO) [CEX2018-000800-M]; Regional Ministry of Education and Research of the Madrid Community; European Social Fund (ESF) [PEJ15/IND/AI-0626]

    This work describes the fabrication process of moth eye antireflective poly (methyl methacrylate) transparent films via roll to roll thermal nanoimprint lithography. The process parameters are investigated and adjusted in order to obtain from a single moth-eye structured mold, a range of antireflective topographies that gradually vary their geometry from protruding to intruding nanocones. A correlation between the process parameters with the optical and mechanical properties of the films is established to illustrate the influence of the processing parameters and serve as guideline to produce antireflective flexible films with balanced properties and optimized performance adequate to the application environment. A finite element model is described predicting the mechanical behavior of the moth-eye PMMA imprinted nanostructures.
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