In situ photocontrol of block copolymer morphology during dip-coating of thin films
dc.contributor.author | Vapaavuori, Jaana | |
dc.contributor.author | Grosrenaud, Josué | |
dc.contributor.author | Pellerin, Christian | |
dc.contributor.author | Bazuin, Geraldine | |
dc.date.accessioned | 2021-07-08T14:53:08Z | |
dc.date.available | NO_RESTRICTION | fr |
dc.date.available | 2021-07-08T14:53:08Z | |
dc.date.issued | 2015-09-28 | |
dc.identifier.uri | http://hdl.handle.net/1866/25339 | |
dc.publisher | American Chemical Society | fr |
dc.subject | Thickness | fr |
dc.subject | Morphology | fr |
dc.subject | Thin films | fr |
dc.subject | Solvents | fr |
dc.subject | Irradiation | fr |
dc.title | In situ photocontrol of block copolymer morphology during dip-coating of thin films | fr |
dc.type | Article | fr |
dc.contributor.affiliation | Université de Montréal. Faculté des arts et des sciences. Département de chimie | fr |
dc.identifier.doi | 10.1021/acsmacrolett.5b00483 | |
dcterms.abstract | We demonstrate a unique combination of simultaneous top-down and bottom-up control of the morphology of block copolymer films by application of in situ optical irradiation during dip-coating. A light-addressable and block-selective small molecule, 4-butyl-4′-hydroxyazobenzene (BHAB), is introduced into a diblock copolymer of polystyrene and poly(4-vinylpyridine) (PS-P4VP) of 28.4 wt % P4VP via supramolecular chemistry, notably by hydrogen bonding to P4VP. We show that the spherical morphology of thin films dip-coated from a THF solution at slow withdrawal rates in the dark convert to cylindrical morphology when dip-coated under illumination. This is attributed to volume expansion of the P4VP/BHAB phase due to trans–cis photoisomerization combined with a light-induced increase in BHAB uptake in the film. The demonstrated photocontrol highlights the potential of dip-coating as a scalable film preparation method that can be easily coupled with external stimuli to direct nanostructured self-assembly in the films as solvent evaporates. | fr |
dcterms.isPartOf | urn:ISSN:2161-1653 | fr |
dcterms.language | eng | fr |
UdeM.ReferenceFournieParDeposant | 10.1021/acsmacrolett.5b00483 | fr |
UdeM.VersionRioxx | Version acceptée / Accepted Manuscript | fr |
oaire.citationTitle | ACS Macro letters | fr |
oaire.citationVolume | 4 | fr |
oaire.citationIssue | 10 | fr |
oaire.citationStartPage | 1158 | fr |
oaire.citationEndPage | 1162 | fr |
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