Clarkson, C.G., Johnson, A., Leggett, G.J. orcid.org/0000-0002-4315-9076 et al. (1 more author) (2019) Slow polymer diffusion on brush-patterned surfaces in aqueous solution. Nanoscale, 11 (13). pp. 6052-6061. ISSN 2040-3364
Abstract
A model system for the investigation of diffusional transport in compartmentalized nanosystems is described. Arrays of “corrals” enclosed within poly[oligo(ethylene glycol)methyl ether methacrylate] (POEGMA) “walls” were fabricated using double-exposure interferometric lithography to deprotect aminosilane films protected by a nitrophenyl group. In exposed regions, removal of the nitrophenyl group enabled attachment of an initiator for the atom-transfer radical polymerization of end-grafted POEGMA (brushes). Diffusion coefficients for poly(ethylene glycol) in these corrals were obtained by fluorescence correlation spectroscopy. Two modes of surface diffusion were observed: one which is similar to diffusion on the unpatterned surface and a very slow mode of surface diffusion that becomes increasingly important as confinement increases. Diffusion within the POEGMA brushes does not significantly contribute to the results.
Metadata
Item Type: | Article |
---|---|
Authors/Creators: |
|
Copyright, Publisher and Additional Information: | © The Royal Society of Chemistry 2019. This is an author produced version of a paper subsequently published in Nanoscale. Uploaded in accordance with the publisher's self-archiving policy. |
Dates: |
|
Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > Department of Chemistry (Sheffield) The University of Sheffield > Faculty of Science (Sheffield) > Department of Physics and Astronomy (Sheffield) |
Funding Information: | Funder Grant number ENGINEERING AND PHYSICAL SCIENCE RESEARCH COUNCIL (EPSRC) EP/I012060/1 |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 15 Mar 2019 10:28 |
Last Modified: | 19 Nov 2021 12:33 |
Status: | Published |
Publisher: | Royal Society of Chemistry |
Refereed: | Yes |
Identification Number: | 10.1039/c9nr00341j |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:143696 |