Coherent acoustic phonon dynamics in chiral copolymers
DC Field | Value | Language |
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dc.contributor.author | Scholz, Mirko | - |
dc.contributor.author | Morgenroth, Marius | - |
dc.contributor.author | Cho, Min Ju | - |
dc.contributor.author | Choi, Dong Hoon | - |
dc.contributor.author | Lenzer, Thomas | - |
dc.contributor.author | Oum, Kawon | - |
dc.date.accessioned | 2021-09-01T01:19:27Z | - |
dc.date.available | 2021-09-01T01:19:27Z | - |
dc.date.created | 2021-06-19 | - |
dc.date.issued | 2019-11 | - |
dc.identifier.issn | 2329-7778 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/62033 | - |
dc.description.abstract | Coherent phonon oscillations in the UV-Vis transient absorption and circular dichroism response of two chiral polyfluorene-based copolymer thin films are investigated. A slow oscillation in the hundred picosecond regime indicates the propagation of a longitudinal acoustic phonon with a frequency in the gigahertz range through cholesteric films of PFPh and PFBT, which allow for the optical determination of the longitudinal sound velocity in these polymers, with values of (2550 +/- 140) and (2490 +/- 150) m s(-1), respectively. The oscillation is induced by a strain wave, resulting in a pressure-induced periodic shift of the electronic absorption bands, as extracted from a Fourier analysis of the transient spectra. The acoustic phonon oscillation is also clearly detected in the transient circular dichroism (TrCD) response of PFPh, indicating a transient pressure-induced shift of the CD spectrum and possibly also phonon-induced chirality changes via pitch length modulation of the cholesteric helical polymer stack. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | AMER INST PHYSICS | - |
dc.subject | LATTICE OSCILLATIONS | - |
dc.subject | GENERATION | - |
dc.subject | SCATTERING | - |
dc.subject | STATES | - |
dc.title | Coherent acoustic phonon dynamics in chiral copolymers | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Choi, Dong Hoon | - |
dc.identifier.doi | 10.1063/1.5124438 | - |
dc.identifier.scopusid | 2-s2.0-85077331221 | - |
dc.identifier.wosid | 000505574600005 | - |
dc.identifier.bibliographicCitation | STRUCTURAL DYNAMICS-US, v.6, no.6 | - |
dc.relation.isPartOf | STRUCTURAL DYNAMICS-US | - |
dc.citation.title | STRUCTURAL DYNAMICS-US | - |
dc.citation.volume | 6 | - |
dc.citation.number | 6 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Chemistry | - |
dc.relation.journalResearchArea | Physics | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Physical | - |
dc.relation.journalWebOfScienceCategory | Physics, Atomic, Molecular & Chemical | - |
dc.subject.keywordPlus | LATTICE OSCILLATIONS | - |
dc.subject.keywordPlus | GENERATION | - |
dc.subject.keywordPlus | SCATTERING | - |
dc.subject.keywordPlus | STATES | - |
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