Flow and conductivity properties of comb-shaped self-organized supramolecules

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Mäki-Ontto, Riikka
dc.date.accessioned 2012-02-13T12:31:08Z
dc.date.available 2012-02-13T12:31:08Z
dc.date.issued 2001-11-23
dc.identifier.isbn 951-22-5696-7
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/2364
dc.description.abstract Structures, which are significantly smaller than e.g. in the present day microelectronics, are pursued in nanotechnology. Structures near molecular level can be constructed for example by imitating biological systems where self-organization and molecular recognition are used to form supramolecules. In this work hierarchically self-organized supramolecular nanostructured materials are constructed with peculiar conductivity behavior. The structures are, as such, not macroscopically aligned and therefore the conductivity is isotropic throughout the macroscopic sample. Two types of supramolecular materials are studied under an oscillatory shear flow in order to find routes towards macroscopically oriented hierarchical structures. The first type consists of 20 - 50 Å lamellar structure due to self-organization of comb-shaped supramolecules. The second structure is a hierarchically self-organized, i.e. lamellar-within-lamellar structure, where there are structures at two length scales, i.e. at 20 - 50 Å and 200 - 1000 Å. Shear flow conditions allowing optimal macroscopic order were identified. Finally, macroscopically aligned protonically conducting material is presented, which shows globally tridirectional conductivity with anisotropic hopping conductivity. Asymmetric structures i.e. lamellae-within-cylinders are also briefly studied and a method is found to achieve mesoporous materials with polymer brushes at the walls of emptied cylinders. The brushes can be used to tailor the functionalities of the pores. The results of this work show that materials, which are relatively simple to produce, allow tailored macroscopic properties due to their aligned self-organized nanoscale structures. en
dc.format.extent 27, [45]
dc.format.mimetype application/pdf
dc.language.iso en en
dc.publisher Helsinki University of Technology en
dc.publisher Teknillinen korkeakoulu fi
dc.relation.haspart J. Ruokolainen, R. Mäkinen, M. Torkkeli, R. Serimaa, T. Mäkelä, G. ten Brinke, O. T. Ikkala, Switching Supramolecular Polymeric Materials with Multiple Length Scales, Science 1998, 280, 557-560.
dc.relation.haspart O. Ikkala, J. Ruokolainen, R. Mäkinen, M. Torkkeli, R. Serimaa, T. Mäkelä, and G. ten Brinke, Electrical Switching Based On Dimensionality Transitions in Nanostructured Polymers, Synthetic Metals 1999, 102, 1498-1501. [article2.pdf] © 1999 Elsevier Science. By permission.
dc.relation.haspart R. Mäkinen, J. Ruokolainen, O. Ikkala, K. de Moel, G. ten Brinke, W. De Odorico, and M. Stamm, Orientation of Supramolecular Self-Organized Polymeric Nanostructures by Oscillatory Shear Flow, Macromolecules, 2000, 33, 3441-3446. [article3.pdf] © 2000 American Chemical Society. By permission.
dc.relation.haspart K. de Moel, R. Mäki-Ontto, M. Stamm, G. ten Brinke, and O. Ikkala, Oscillatory Shear Flow Induced Alignment of Lamellar Melts of Hydrogen Bonded Comb Copolymer Supramolecules, Macromolecules 2001, 34, 2892-2900. [article4.pdf] © 2001 American Chemical Society. By permission.
dc.relation.haspart R. Mäki-Ontto, K. de Moel, E. Polushkin, G. Alberda van Ekenstein, G. ten Brinke, and O. Ikkala, Tridirectional protonic conductivity in soft materials, Report TKK-F-A809 2001, submitted to Advanced Materials. [article5.pdf] © 2002 WILEY-VCH Verlag. By permission.
dc.relation.haspart R. Mäki-Ontto, K. de Moel, W. de Odorico, J. Ruokolainen, M. Stamm, G. ten Brinke, and O. Ikkala, "Hairy Tubes": Mesoporous Materials Containing Hollow Self-Organized Cylinders with Polymer Brushes at the Walls, Advanced Materials, 2001, 13, 117-121. [article6.pdf] © 2001 WILEY-VCH Verlag. By permission.
dc.subject.other Physics en
dc.subject.other Biotechnology en
dc.subject.other Materials science en
dc.title Flow and conductivity properties of comb-shaped self-organized supramolecules en
dc.type G5 Artikkeliväitöskirja fi
dc.description.version reviewed en
dc.contributor.department Department of Engineering Physics and Mathematics en
dc.contributor.department Teknillisen fysiikan ja matematiikan osasto fi
dc.subject.keyword oscillatory shear flow en
dc.subject.keyword macroscopic orientation en
dc.subject.keyword protonic conductivity en
dc.subject.keyword mesoporous materials en
dc.subject.keyword hierarchical structures en
dc.identifier.urn urn:nbn:fi:tkk-003094
dc.type.dcmitype text en
dc.type.ontasot Väitöskirja (artikkeli) fi
dc.type.ontasot Doctoral dissertation (article-based) en
dc.contributor.lab Optics and Molecular Materials en
dc.contributor.lab Optiikka ja molekyylimateriaalit fi

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