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

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Title: Injection moulding of ultra high aspect ratio nanostructures using coated polymer tooling.
Authors: Stormonth-Darling, J M1, Pedersen, R H1, How, C2, Gadegaard, N1 Nikolaj.Gadegaard@glasgow.ac.uk
Source: Journal of Micromechanics & Microengineering. Jul2014, Vol. 24 Issue 7, p1-1. 1p.
Subjects: Injection molding, Nanostructures, Polymers, Coating processes, Nanofabrication, Cost effectiveness
Abstract: 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. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract: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. [ABSTRACT FROM AUTHOR]
ISSN:13616439
DOI:10.1088/0960-1317/24/7/075019