Relaxation in Thin Polymer Films Mapped across the Film Thickness by Astigmatic Single-Molecule Imaging

Handle URI:
http://hdl.handle.net/10754/599494
Title:
Relaxation in Thin Polymer Films Mapped across the Film Thickness by Astigmatic Single-Molecule Imaging
Authors:
Oba, Tatsuya; Vacha, Martin
Abstract:
We have studied relaxation processes in thin supported films of poly(methyl acrylate) at the temperature corresponding to 13 K above the glass transition by monitoring the reorientation of single perylenediimide molecules doped into the films. The axial position of the dye molecules across the thickness of the film was determined with a resolution of 12 nm by analyzing astigmatic fluorescence images. The average relaxation times of the rotating molecules do not depend on the overall thickness of the film between 20 and 110 nm. The relaxation times also do not show any dependence on the axial position within the films for the film thickness between 70 and 110 nm. In addition to the rotating molecules we observed a fraction of spatially diffusing molecules and completely immobile molecules. These molecules indicate the presence of thin (<5 nm) high-mobility surface layer and low-mobility layer at the interface with the substrate. (Figure presented) © 2012 American Chemical Society.
Citation:
Oba T, Vacha M (2012) Relaxation in Thin Polymer Films Mapped across the Film Thickness by Astigmatic Single-Molecule Imaging. ACS Macro Letters 1: 784–788. Available: http://dx.doi.org/10.1021/mz3002269.
Publisher:
American Chemical Society (ACS)
Journal:
ACS Macro Letters
Issue Date:
19-Jun-2012
DOI:
10.1021/mz3002269
Type:
Article
ISSN:
2161-1653; 2161-1653
Sponsors:
The authors thank Dr. Satoshi Habuchi (currently at KAUST, Saudi Arabia) for many helpful discussions. This work was supported by a Grant-in-Aid for Scientific Research No. 23651107 of the Japan Society for the Promotion of Science and by a Research Grant of Ogasawara Foundation.
Appears in Collections:
Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorOba, Tatsuyaen
dc.contributor.authorVacha, Martinen
dc.date.accessioned2016-02-28T05:52:09Zen
dc.date.available2016-02-28T05:52:09Zen
dc.date.issued2012-06-19en
dc.identifier.citationOba T, Vacha M (2012) Relaxation in Thin Polymer Films Mapped across the Film Thickness by Astigmatic Single-Molecule Imaging. ACS Macro Letters 1: 784–788. Available: http://dx.doi.org/10.1021/mz3002269.en
dc.identifier.issn2161-1653en
dc.identifier.issn2161-1653en
dc.identifier.doi10.1021/mz3002269en
dc.identifier.urihttp://hdl.handle.net/10754/599494en
dc.description.abstractWe have studied relaxation processes in thin supported films of poly(methyl acrylate) at the temperature corresponding to 13 K above the glass transition by monitoring the reorientation of single perylenediimide molecules doped into the films. The axial position of the dye molecules across the thickness of the film was determined with a resolution of 12 nm by analyzing astigmatic fluorescence images. The average relaxation times of the rotating molecules do not depend on the overall thickness of the film between 20 and 110 nm. The relaxation times also do not show any dependence on the axial position within the films for the film thickness between 70 and 110 nm. In addition to the rotating molecules we observed a fraction of spatially diffusing molecules and completely immobile molecules. These molecules indicate the presence of thin (<5 nm) high-mobility surface layer and low-mobility layer at the interface with the substrate. (Figure presented) © 2012 American Chemical Society.en
dc.description.sponsorshipThe authors thank Dr. Satoshi Habuchi (currently at KAUST, Saudi Arabia) for many helpful discussions. This work was supported by a Grant-in-Aid for Scientific Research No. 23651107 of the Japan Society for the Promotion of Science and by a Research Grant of Ogasawara Foundation.en
dc.publisherAmerican Chemical Society (ACS)en
dc.titleRelaxation in Thin Polymer Films Mapped across the Film Thickness by Astigmatic Single-Molecule Imagingen
dc.typeArticleen
dc.identifier.journalACS Macro Lettersen
dc.contributor.institutionTokyo Institute of Technology, Tokyo, Japanen
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