Resilient moth-eye nanoimprinted antireflective and self-cleaning TiO2 sputter-coated PMMA films

Jacobo-Martin, AlejandraCiudad Univ Cantoblanco, Madrid Inst Adv Studies Nanoscience IMDEA Nanosci, C Faraday 9, Madrid 28049, Spain. (författare)

Moth-eye nanostructures are amongst the most remarkable surfaces in nature because of their multi-functionality including antireflection, self-cleaning and bactericidal ability. Moth-eye surfaces consist of subwavelength arrays of tapered nanostructures, which are challenging to reproduce artificially. Nanoimprint lithography is probably one of the most suited technologies for this purpose. However, the poor mechanical resilience and durability of the polymeric nanocones when exposed to the environment, hinders their use in actual applications. To overcome these limitations, this work demonstrates the use of a thin oxide coating over the polymer moth-eye features imprinted on poly methyl methacrylate (PMMA) films. Particularly TiO2 conformal thin film coatings are deposited by unipolar pulsed dc magnetron sputtering over the antireflective nanopatterns acting as encapsulant. The coating, while preserving the antireflective properties, protects the nanostructures against mechanical scratching and improves substantially their thermal stability to over 250 ?. Furthermore, the TiO2 layer provides additional photoinduced self-cleaning functionality and at the same time it protects the matrix from UV photodegradation. The robust and durable antireflective surfaces developed here may find application on solar cells covers, flat panel displays or on optical components.

Hernandez, Jaime J.Ciudad Univ Cantoblanco, Madrid Inst Adv Studies Nanoscience IMDEA Nanosci, C Faraday 9, Madrid 28049, Spain. (författare)
Solano, EduardoALBA Synchrotron, Carrer Llum 2 26, 08290 Cerdanyola Vall, Barcelona, Spain. (författare)
Monclus, Miguel A.Tecnogetafe, IMDEA Mat Inst, C Eric Kandel 2, Getafe 28906, Spain. (författare)
Martinez, Juan CarlosALBA Synchrotron, Carrer Llum 2 26, 08290 Cerdanyola Vall, Barcelona, Spain. (författare)
Fernandes, Daniel Filipe FélixUppsala universitet,Fasta tillståndets elektronik(Swepub:uu)danfe176 (författare)
Pedraz, PatriciaCiudad Univ Cantoblanco, Madrid Inst Adv Studies Nanoscience IMDEA Nanosci, C Faraday 9, Madrid 28049, Spain. (författare)
Molina-Aldareguia, Jon M.Tecnogetafe, IMDEA Mat Inst, C Eric Kandel 2, Getafe 28906, Spain.;Univ Polit prime ecnica Madrid, Dept Mech Engn, Madrid 28006, Spain. (författare)
Kubart, Tomas,1977-Uppsala universitet,Fasta tillståndets elektronik(Swepub:uu)tomku340 (författare)
Rodriguez, IsabelCiudad Univ Cantoblanco, Madrid Inst Adv Studies Nanoscience IMDEA Nanosci, C Faraday 9, Madrid 28049, Spain. (författare)
Ciudad Univ Cantoblanco, Madrid Inst Adv Studies Nanoscience IMDEA Nanosci, C Faraday 9, Madrid 28049, Spain.ALBA Synchrotron, Carrer Llum 2 26, 08290 Cerdanyola Vall, Barcelona, Spain. (creator_code:org_t)

Av författaren/redakt...: Jacobo-Martin, A ...; Hernandez, Jaime ...; Solano, Eduardo; Monclus, Miguel ...; Martinez, Juan C ...; Fernandes, Danie ...; visa fler...; Pedraz, Patricia; Molina-Aldaregui ...; Kubart, Tomas, 1 ...; Rodriguez, Isabe ...; visa färre...

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