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Bioinspired Microstructured Polymer Surfaces with Antireflective Properties
Over the years, different approaches to obtaining antireflective surfaces have been explored, such as using index-matching, interference, or micro- and nanostructures. Structural super black colors are ubiquitous in nature, and biomimicry thus constitutes an interesting way to develop antireflective...
Autores principales: | , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8470586/ https://www.ncbi.nlm.nih.gov/pubmed/34578614 http://dx.doi.org/10.3390/nano11092298 |
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author | Wetzel, Alexandre Emmanuel del Castillo Iniesta, Nuria Engay, Einstom Mandsberg, Nikolaj Kofoed Schou Dinesen, Celine Hanif, Bilal Rashid Berg-Sørensen, Kirstine Bunea, Ada-Ioana Taboryski, Rafael |
author_facet | Wetzel, Alexandre Emmanuel del Castillo Iniesta, Nuria Engay, Einstom Mandsberg, Nikolaj Kofoed Schou Dinesen, Celine Hanif, Bilal Rashid Berg-Sørensen, Kirstine Bunea, Ada-Ioana Taboryski, Rafael |
author_sort | Wetzel, Alexandre Emmanuel |
collection | PubMed |
description | Over the years, different approaches to obtaining antireflective surfaces have been explored, such as using index-matching, interference, or micro- and nanostructures. Structural super black colors are ubiquitous in nature, and biomimicry thus constitutes an interesting way to develop antireflective surfaces. Moth-eye nanostructures, for example, are well known and have been successfully replicated using micro- and nanofabrication. However, other animal species, such as birds of paradise and peacock spiders, have evolved to display larger structures with antireflective features. In peacock spiders, the antireflective properties of their super black patches arise from relatively simple microstructures with lens-like shapes organized in tightly packed hexagonal arrays, which makes them a good candidate for cheap mass replication techniques. In this paper, we present the fabrication and characterization of antireflective microarrays inspired by the peacock spider’s super black structures encountered in nature. Firstly, different microarrays 3D models are generated from a surface equation. Secondly, the arrays are fabricated in a polyacrylate resin by super-resolution 3D printing using two-photon polymerization. Thirdly, the resulting structures are inspected using a scanning electron microscope. Finally, the reflectance and transmittance of the printed structures are characterized at normal incidence with a dedicated optical setup. The bioinspired microlens arrays display excellent antireflective properties, with a measured reflectance as low as 0.042 ± 0.004% for normal incidence, a wavelength of 550 nm, and a collection angle of 14.5°. These values were obtained using a tightly-packed array of slightly pyramidal lenses with a radius of 5 µm and a height of 10 µm. |
format | Online Article Text |
id | pubmed-8470586 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-84705862021-09-27 Bioinspired Microstructured Polymer Surfaces with Antireflective Properties Wetzel, Alexandre Emmanuel del Castillo Iniesta, Nuria Engay, Einstom Mandsberg, Nikolaj Kofoed Schou Dinesen, Celine Hanif, Bilal Rashid Berg-Sørensen, Kirstine Bunea, Ada-Ioana Taboryski, Rafael Nanomaterials (Basel) Article Over the years, different approaches to obtaining antireflective surfaces have been explored, such as using index-matching, interference, or micro- and nanostructures. Structural super black colors are ubiquitous in nature, and biomimicry thus constitutes an interesting way to develop antireflective surfaces. Moth-eye nanostructures, for example, are well known and have been successfully replicated using micro- and nanofabrication. However, other animal species, such as birds of paradise and peacock spiders, have evolved to display larger structures with antireflective features. In peacock spiders, the antireflective properties of their super black patches arise from relatively simple microstructures with lens-like shapes organized in tightly packed hexagonal arrays, which makes them a good candidate for cheap mass replication techniques. In this paper, we present the fabrication and characterization of antireflective microarrays inspired by the peacock spider’s super black structures encountered in nature. Firstly, different microarrays 3D models are generated from a surface equation. Secondly, the arrays are fabricated in a polyacrylate resin by super-resolution 3D printing using two-photon polymerization. Thirdly, the resulting structures are inspected using a scanning electron microscope. Finally, the reflectance and transmittance of the printed structures are characterized at normal incidence with a dedicated optical setup. The bioinspired microlens arrays display excellent antireflective properties, with a measured reflectance as low as 0.042 ± 0.004% for normal incidence, a wavelength of 550 nm, and a collection angle of 14.5°. These values were obtained using a tightly-packed array of slightly pyramidal lenses with a radius of 5 µm and a height of 10 µm. MDPI 2021-09-04 /pmc/articles/PMC8470586/ /pubmed/34578614 http://dx.doi.org/10.3390/nano11092298 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Wetzel, Alexandre Emmanuel del Castillo Iniesta, Nuria Engay, Einstom Mandsberg, Nikolaj Kofoed Schou Dinesen, Celine Hanif, Bilal Rashid Berg-Sørensen, Kirstine Bunea, Ada-Ioana Taboryski, Rafael Bioinspired Microstructured Polymer Surfaces with Antireflective Properties |
title | Bioinspired Microstructured Polymer Surfaces with Antireflective Properties |
title_full | Bioinspired Microstructured Polymer Surfaces with Antireflective Properties |
title_fullStr | Bioinspired Microstructured Polymer Surfaces with Antireflective Properties |
title_full_unstemmed | Bioinspired Microstructured Polymer Surfaces with Antireflective Properties |
title_short | Bioinspired Microstructured Polymer Surfaces with Antireflective Properties |
title_sort | bioinspired microstructured polymer surfaces with antireflective properties |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8470586/ https://www.ncbi.nlm.nih.gov/pubmed/34578614 http://dx.doi.org/10.3390/nano11092298 |
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