Macrophase Separation Using Block Copolymer Blends

dc.contributor.author Philiph, Rachel
dc.contributor.department Massachusetts Institute of Technology
dc.date 2018-02-14T10:01:14.000
dc.date.accessioned 2020-07-07T05:10:38Z
dc.date.available 2020-07-07T05:10:38Z
dc.date.issued 2014-04-15
dc.description.abstract <p>Diblock copolymers (BCP) have been used in the past to create nano-scale features in thin films. Films of a single BCP have been successfully controlled using templates, but produce features with only one morphology or one size. This limits the complexity of features and range of possible applications. By using blends of BCPs with immiscible blocks, it is hypothesized that macrophase-separated thin films can be created. A blend of poly(styrene-b-dimethylsiloxane) and poly(styrene-b-ferrocenylsilane) (PS-b-PDMS/PS-b-PFS) block copolymer was spin coated on a silicon substrate functionalized with polystyrene. Samples were then annealed by solvents controlled by a mass flow system. Samples were characterized using scanning electron microscopy (SEM). Through experimentation, film thickness, solvents, and annealing times were optimized. A film thickness of about 40 nm, solvents to selectively swell each block, and an annealing time of 12 hours most effectively achieved macrophase separation. In the future, chemical and physical templating will be used to control the placement and morphology of regions. This work could result in complex features that have not previously been possible.</p>
dc.identifier archive/lib.dr.iastate.edu/undergradresearch_symposium/2014/presentations/50/
dc.identifier.articleid 1049
dc.identifier.contextkey 5914609
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath undergradresearch_symposium/2014/presentations/50
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/91615
dc.relation.ispartofseries Symposium on Undergraduate Research and Creative Expression
dc.source.bitstream archive/lib.dr.iastate.edu/undergradresearch_symposium/2014/presentations/50/PhiliphRachel.pdf|||Sat Jan 15 00:40:51 UTC 2022
dc.subject.disciplines Polymer and Organic Materials
dc.title Macrophase Separation Using Block Copolymer Blends
dc.type event
dc.type.genre article
dspace.entity.type Publication
relation.isSeriesOfPublication 6730f354-97b8-4408-bad3-7e5c3b2fca9d
thesis.degree.discipline Materials Engineering
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