Injection moulding of ultra high aspect ratio nanostructures using coated polymer tooling

Stormonth-Darling, J. M. , Pedersen, R. H., How, C. and Gadegaard, N. (2014) Injection moulding of ultra high aspect ratio nanostructures using coated polymer tooling. Journal of Micromechanics and Microengineering, 24(7), 075019. (doi:10.1088/0960-1317/24/7/075019)

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Replication-based nanofabrication techniques offer rapid, cost effective ways to produce nanostructured devices for a host of applications in engineering, biological research and beyond. In this work we developed a method to replicate ultra high aspect ratio (UHAR) nanopillars by injection molding with failure rates lower than one pillar in a thousand. We provide a review of the literature in which replication of difficult micro- and nanostructures is facilitated through the use of different tooling materials and surface coatings, before describing the non-adhesive surface coatings which we used to translate a previously developed technique from low to high aspect ratios. This development involved a systematic study of nine different surface coatings on polymer tooling initially patterned by nanoimprint lithography. Using this method we were able to produce injection moulded pillar-like nanostructures with aspect ratios of up to 20:1, more than 6 times that reported elsewhere in the literature for this type of feature.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Pedersen, Mr Rasmus and How, Mr Colin and Stormonth-Darling, Mr John and Gadegaard, Professor Nikolaj
Authors: Stormonth-Darling, J. M., Pedersen, R. H., How, C., and Gadegaard, N.
College/School:College of Science and Engineering > School of Engineering > Biomedical Engineering
College of Science and Engineering > School of Physics and Astronomy
Journal Name:Journal of Micromechanics and Microengineering
Publisher:IOP Publishing Ltd.
ISSN (Online):1361-6439
Copyright Holders:Copyright © 2014 IOP Publishing Ltd.
First Published:First published in Journal of Micromechanics and Microengineering 24(7):075019
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
462361Na PANILNikolaj GadegaardEuropean Commission (EC)214249 NAPANILENG - BIOMEDICAL ENGINEERING