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Choi YY, Kwak K, Seo JW, Park M, Paik H, Lee JY, Hong J, No K. Ferroelectric nanodot formation from spin-coated poly(vinylidene fluoride-co-trifluoroethylene) films and their application to organic solar cells. J Appl Polym Sci 2014. [DOI: 10.1002/app.41230] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yoon-Young Choi
- Department of Materials Science and Engineering; KAIST; Daejeon 305-701 Korea
| | - Kyungwon Kwak
- Department of Chemistry; Chung-Ang University; Seoul 156-756 Korea
| | - Ji-Won Seo
- Graduate School of EEWS; KAIST Institute for the Nano Century, KAIST; Daejeon 305-701 Korea
| | - Moonkyu Park
- Department of Materials Science and Engineering; KAIST; Daejeon 305-701 Korea
| | - Haemin Paik
- Department of Materials Science and Engineering; KAIST; Daejeon 305-701 Korea
| | - Jung-Yong Lee
- Graduate School of EEWS; KAIST Institute for the Nano Century, KAIST; Daejeon 305-701 Korea
| | - Jongin Hong
- Department of Chemistry; Chung-Ang University; Seoul 156-756 Korea
| | - Kwangsoo No
- Department of Materials Science and Engineering; KAIST; Daejeon 305-701 Korea
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Sills S, Overney RM, Chau W, Lee VY, Miller RD, Frommer J. Interfacial glass transition profiles in ultrathin, spin cast polymer films. J Chem Phys 2004; 120:5334-8. [PMID: 15267406 DOI: 10.1063/1.1647047] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Interfacial glass transition temperature (T(g)) profiles in spin cast, ultrathin films of polystyrene and derivatives were investigated using shear-modulated scanning force microscopy. The transitions were measured as a function of film thickness (delta), molecular weight, and crosslinking density. The T(g)(delta) profiles were nonmonotonic and exhibited two regimes: (a) a sublayer extending about 10 nm from the substrate, with T(g) values lowered up to approximately 10 degrees C below the bulk value, and (b) an intermediate regime extending over 200 nm beyond the sublayer, with T(g) values exceeding the bulk value by up to 10 degrees C. Increasing the molecular weight was found to shift the T(g)(delta) profiles further from the substrate interface, on the order of 10 nm/kDa. Crosslinking the precast films elevated the absolute T(g) values, but had no effect on the spatial length scale of the T(g)(delta) profiles. These results are explained in the context of film preparation history and its influence on molecular mobility. Specifically, the observed rheological anisotropy is interpreted based on the combined effects of shear-induced structuring and thermally activated interdiffusion.
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Affiliation(s)
- Scott Sills
- Department of Chemical Engineering, University of Washington, Seattle, Washington 98195, USA
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Bartoš J, Bandžuch P, Šauša O, Krištiaková K, Krištiak J, Kanaya T, Jenninger W. Free Volume Microstructure and Its Relationship to the Chain Dynamics in cis-1,4-Poly(butadiene) As Seen by Positron Annihilation Lifetime Spectroscopy. Macromolecules 1997. [DOI: 10.1021/ma961512u] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- J. Bartoš
- Polymer Institute of the Slovak Academy of Sciences, SK-842 36 Bratislava, Slovak Republic, Institute of Physics of the Slovak Academy of Sciences, SK-842 28 Bratislava, Slovak Republic, Institute for Chemical Research, Kyoto University, Uji 611, Japan, and Deutsches Kunststoff-Institut, Schlossgartenstrasse 6, D-642 89 Darmstadt, Germany
| | - P. Bandžuch
- Polymer Institute of the Slovak Academy of Sciences, SK-842 36 Bratislava, Slovak Republic, Institute of Physics of the Slovak Academy of Sciences, SK-842 28 Bratislava, Slovak Republic, Institute for Chemical Research, Kyoto University, Uji 611, Japan, and Deutsches Kunststoff-Institut, Schlossgartenstrasse 6, D-642 89 Darmstadt, Germany
| | - O. Šauša
- Polymer Institute of the Slovak Academy of Sciences, SK-842 36 Bratislava, Slovak Republic, Institute of Physics of the Slovak Academy of Sciences, SK-842 28 Bratislava, Slovak Republic, Institute for Chemical Research, Kyoto University, Uji 611, Japan, and Deutsches Kunststoff-Institut, Schlossgartenstrasse 6, D-642 89 Darmstadt, Germany
| | - K. Krištiaková
- Polymer Institute of the Slovak Academy of Sciences, SK-842 36 Bratislava, Slovak Republic, Institute of Physics of the Slovak Academy of Sciences, SK-842 28 Bratislava, Slovak Republic, Institute for Chemical Research, Kyoto University, Uji 611, Japan, and Deutsches Kunststoff-Institut, Schlossgartenstrasse 6, D-642 89 Darmstadt, Germany
| | - J. Krištiak
- Polymer Institute of the Slovak Academy of Sciences, SK-842 36 Bratislava, Slovak Republic, Institute of Physics of the Slovak Academy of Sciences, SK-842 28 Bratislava, Slovak Republic, Institute for Chemical Research, Kyoto University, Uji 611, Japan, and Deutsches Kunststoff-Institut, Schlossgartenstrasse 6, D-642 89 Darmstadt, Germany
| | - T. Kanaya
- Polymer Institute of the Slovak Academy of Sciences, SK-842 36 Bratislava, Slovak Republic, Institute of Physics of the Slovak Academy of Sciences, SK-842 28 Bratislava, Slovak Republic, Institute for Chemical Research, Kyoto University, Uji 611, Japan, and Deutsches Kunststoff-Institut, Schlossgartenstrasse 6, D-642 89 Darmstadt, Germany
| | - W. Jenninger
- Polymer Institute of the Slovak Academy of Sciences, SK-842 36 Bratislava, Slovak Republic, Institute of Physics of the Slovak Academy of Sciences, SK-842 28 Bratislava, Slovak Republic, Institute for Chemical Research, Kyoto University, Uji 611, Japan, and Deutsches Kunststoff-Institut, Schlossgartenstrasse 6, D-642 89 Darmstadt, Germany
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