Large block copolymer self-assembly for fabrication of subwavelength nanostructures for applications in optics

Show simple item record Mokarian-Tabari, Parvaneh Senthamaraikannan, Ramsankar Glynn, Colm Collins, Timothy W. Cummins, Cian Nugent, David O'Dwyer, Colm Morris, Michael A. 2018-05-09T10:45:04Z 2018-05-09T10:45:04Z 2017-04-05
dc.identifier.citation Mokarian-Tabari, P., Senthamaraikannan, R., Glynn, C., Collins, T. W., Cummins, C., Nugent, D., O’Dwyer, C. and Morris, M. A. (2017) 'Large Block Copolymer Self-Assembly for Fabrication of Subwavelength Nanostructures for Applications in Optics', Nano Letters, 17(5), pp. 2973-2978. doi: 10.1021/acs.nanolett.7b00226 en
dc.identifier.volume 17 en
dc.identifier.startpage 2973 en
dc.identifier.endpage 2978 en
dc.identifier.issn 1530-6984
dc.identifier.issn 1530-6992
dc.identifier.doi 10.1021/acs.nanolett.7b00226
dc.description.abstract Nanostructured surfaces are common in nature and exhibit properties such as antireflectivity (moth eyes), self-cleaning (lotus leaf), iridescent colors (butterfly wings), and water harvesting (desert beetles). We now understand such properties and can mimic some of these natural structures in the laboratory. However, these synthetic structures are limited since they are not easily mass produced over large areas due to the limited scalability of current technologies such as UV-lithography, the high cost of infrastructure, and the difficulty in nonplanar surfaces. Here, we report a solution process based on block copolymer (BCP) self-assembly to fabricate subwavelength structures on large areas of optical and curved surfaces with feature sizes and spacings designed to efficiently scatter visible light. Si nanopillars (SiNPs) with diameters of ∼115 ± 19 nm, periodicity of 180 ± 18 nm, and aspect ratio of 2–15 show a reduction in reflectivity by a factor of 100, <0.16% between 400 and 900 nm at an angle of incidence of 30°. Significantly, the reflectivity remains below 1.75% up to incident angles of 75°. Modeling the efficiency of a SiNP PV suggests a 24.6% increase in efficiency, representing a 3.52% (absolute) or 16.7% (relative) increase in electrical energy output from the PV system compared to AR-coated device. en
dc.description.sponsorship Enterprise Ireland (Commercialisation Fund- CF/2014//4055) en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher American Chemical Society (ACS) en
dc.rights © 2017 American Chemical Society. This document is the Accepted Manuscript version of a Published Work that appeared in final form in Nano Letters, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see en
dc.subject Subwavelength nanostructures en
dc.subject Antireflective surfaces en
dc.subject Reflectivity en
dc.subject Omnidirectional en
dc.subject Graded refractive index en
dc.subject Block copolymers en
dc.subject Optics en
dc.title Large block copolymer self-assembly for fabrication of subwavelength nanostructures for applications in optics en
dc.type Article (preprint) en
dc.internal.authorcontactother Colm O'Dwyer, Chemistry, University College Cork, Cork, Ireland. +353-21-490-3000 Email: en
dc.internal.availability Full text available en 2018-05-03T07:20:57Z
dc.description.version Accepted Version en
dc.internal.rssid 394488776
dc.contributor.funder Enterprise Ireland en
dc.contributor.funder Science Foundation Ireland en
dc.description.status Peer reviewed en
dc.identifier.journaltitle Nano letters en
dc.internal.copyrightchecked Yes en
dc.internal.licenseacceptance Yes en
dc.internal.IRISemailaddress en
dc.relation.project info:eu-repo/grantAgreement/SFI/SFI Research Centres/12/RC/2278/IE/Advanced Materials and BioEngineering Research Centre (AMBER)/ en
dc.relation.project info:eu-repo/grantAgreement/SFI/SFI Technology and Innovation Development Award (TIDA)/15/TIDA/2893/IE/Advanced Battery Materials for High Volumetric Energy Density Li-ion Batteries for Remote Off-Grid Power/ en
dc.relation.project info:eu-repo/grantAgreement/SFI/SFI Investigator Programme/14/IA/2581/IE/Diffractive optics and photonic probes for efficient mouldable 3D printed battery skin materials for portable electronic devices/ en

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