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DC Field | Value | Language |
---|---|---|
dc.citation.endPage | 9279 | - |
dc.citation.number | 22 | - |
dc.citation.startPage | 9275 | - |
dc.citation.title | MACROMOLECULES | - |
dc.citation.volume | 38 | - |
dc.contributor.author | Bae, Sung Chul | - |
dc.contributor.author | Lin, ZQ | - |
dc.contributor.author | Granick, Steve | - |
dc.date.accessioned | 2023-12-22T10:11:40Z | - |
dc.date.available | 2023-12-22T10:11:40Z | - |
dc.date.created | 2014-10-08 | - |
dc.date.issued | 2005-11 | - |
dc.description.abstract | Within a surface forces apparatus newly equipped for spectroscopic measurements, the photoluminescence and absorption spectra were studied of conjugated polymer films confined to less than the random coil dimension. A dilute solution of MEH-PPV, poly(2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene), was exposed to atomically smooth surfaces of muscovite mica and allowed to adsorb from toluene, and then the surface spacing was reduced to approximate to 2 nm, which is less than the unperturbed radius of gyration of the polymer chains. Subsequent unidirectional shear with amplitude; 20 times the surface spacing provided preferential alignment while the solvent evaporated. Chain alignment was quantified from both photoluminescence and absorption spectra. Curiously, a bimodal distribution of chain alignment was observed, parallel to the shear direction in 2/3 of the cases but perpendicular to the shear direction in 1/3 of the cases. On the basis of analysis of the photoluminescence spectra, confinement and shear-induced changes of the electronic structure are also discussed. This is considered to be the first study of polymer absorption and photoluminescence spectra within the contact area of a surface forces apparatus. | - |
dc.identifier.bibliographicCitation | MACROMOLECULES, v.38, no.22, pp.9275 - 9279 | - |
dc.identifier.doi | 10.1021/ma0510035 | - |
dc.identifier.issn | 0024-9297 | - |
dc.identifier.scopusid | 2-s2.0-27744485598 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/7061 | - |
dc.identifier.url | https://pubs.acs.org/doi/10.1021/ma0510035 | - |
dc.identifier.wosid | 000232975900042 | - |
dc.language | 영어 | - |
dc.publisher | AMER CHEMICAL SOC | - |
dc.title | Conjugated polymers confined and sheared: Photoluminescence and absorption dichroism in a surface forces apparatus | - |
dc.type | Article | - |
dc.description.isOpenAccess | FALSE | - |
dc.description.journalRegisteredClass | scopus | - |
dc.subject.keywordPlus | THIN-FILMS | - |
dc.subject.keywordPlus | INTERCHAIN INTERACTIONS | - |
dc.subject.keywordPlus | BLOCK-COPOLYMERS | - |
dc.subject.keywordPlus | ENERGY-TRANSFER | - |
dc.subject.keywordPlus | POLY(DIMETHYLSILOXANE) | - |
dc.subject.keywordPlus | SPECTROSCOPY | - |
dc.subject.keywordPlus | MORPHOLOGY | - |
dc.subject.keywordPlus | DYNAMICS | - |
dc.subject.keywordPlus | FRICTION | - |
dc.subject.keywordPlus | ORDER | - |
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