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Park, Soojin
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Ordering evolution of block copolymer thin films upon solvent-annealing process

Author(s)
Lee, Dong HyunCho, HeesookYoo, SeungminPark, Soojin
Issued Date
2012-10
DOI
10.1016/j.jcis.2012.06.030
URI
https://scholarworks.unist.ac.kr/handle/201301/3569
Fulltext
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84864100628
Citation
JOURNAL OF COLLOID AND INTERFACE SCIENCE, v.383, no.1, pp.118 - 123
Abstract
Morphologies of polystyrene-block-poly(2-vinylpyridine) copolymer (S2VP) thin films, which are forming poly(2-vinylpyridine) cylinders in bulk phase, were investigated by atomic force microscopy (AFM) and transmission electron microscopy (TEM) to account for their ordering behavior induced by solvent annealing. Initially, when the copolymer was dissolved in toluene, which is selective solvent for majority polystyrene (PS) blocks, and was spin-coated on Si substrates, dimple-type micellar structures of S2VP were formed. After the film was placed in a solvent-annealing chamber covered with a lid under the existence of chloroform, surface morphologies of S2VP were measured as a function of annealing time. In this study, it was found that the morphologies of S2VP thin film repeated the cycle of the creation and extinction of various morphologies on ordering process. Namely, S2VP exhibited the various transformations between different morphologies, including highly disordered state, cylinders normal to the plane, and cylinders parallel to the plane. Each of the morphologies observed here was employed as a template to synthesize gold (Au) nanoparticles or nanowires. The arrays of Au nano-objects were used to tune a surface plasmon resonance.
Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
ISSN
0021-9797
Keyword (Author)
Block copolymersSelf-assemblySolvent annealingSurface morphologyMicrophase separation
Keyword
TRIBLOCK COPOLYMERDIBLOCK COPOLYMERMICRODOMAIN ORIENTATIONELECTRIC-FIELDSARRAYSGRAPHOEPITAXYNANOPARTICLESLITHOGRAPHYTRANSITIONBRUSHES

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