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3. Phase segregation in thin films of conjugated polyrotaxane-poly(ethylene oxide) blends: A scanning force microscopy study

Author

Sardone, Laura, Williams, Charlotte C., Anderson, Harry L., Marietta, Giovanni, Cacialli, Franco, and Samori, Paolo

Subjects
chemistry.chemical_classification, Materials science, Oxide, Nanoparticle, Polymer, Substrate (electronics), Condensed Matter Physics, Electronic, Optical and Magnetic Materials, Indium tin oxide, Biomaterials, chemistry.chemical_compound, chemistry, Chemical engineering, Phase (matter), Polymer chemistry, Electrochemistry, Polymer blend, Atomic force microscopy, Conjugated polymers, Hydrophilicity, Phase separation, Polyethylene oxides, Surface morphology, Thin film
Abstract

Scanning force microscopy (SFM) is used to study the surface morphology of spin-coated thin films of the ion-transport polymer poly(ethylene oxide) (PEO) blended with either cyclodextrin (CD)-threaded conjugated polyrotaxanes based on poly(4,4′-diphenylene-vinylene) (PDV), β-CD-PDV, or their uninsulated PDV analogues. Both the polyrotaxanes and their blends with PEO are of interest as active materials in light-emitting devices. The SFM analysis of the blended films supported on mica and on indium tin oxide (ITO) reveals in both cases a morphology that reflects the substrate topography on the (sub-)micrometer scale and is characterized by an absence of the surface structure that is usually associated with phase segregation. This observation confirms a good miscibility of the two hydrophilic components, when deposited by using spin-coating, as suggested by the luminescence data on devices and thin films. Clear evidence of phase segregation is instead found when blending PEO with a new organic-soluble conjugated polymer such as a silylated poly(fluorene)-afr-poly(para-phenylene) based polyrotaxane (THS-β-CD-PF- PPP). The results obtained are relevant to the understanding of the factors influencing the interfacial and the intermolecular interactions with a view to optimizing the performance of light-emitting diodes, and light-emitting electrochemical cells based on supramolecularly engineered organic polymers. © 2007 WILEY-VCH Verlag GmbH and Co. KGaA.

Published
2007
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5. Organic Electronics: Non-conventional Processing and Post-processing Methods for the Nanostructuring of Conjugated Materials for Organic Electronics (Adv. Funct. Mater. 7/2011)

Author

De Luca, Giovanna, primary, Pisula, Wojciech, additional, Credgington, Dan, additional, Treossi, Emanuele, additional, Fenwick, Oliver, additional, Lazzerini, Giovanni Mattia, additional, Dabirian, Reza, additional, Orgiu, Emanuele, additional, Liscio, Andrea, additional, Palermo, Vincenzo, additional, Müllen, Klaus, additional, Cacialli, Franco, additional, and Samorì, Paolo, additional

Published
2011
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7. Non-conventional Processing and Post-processing Methods for the Nanostructuring of Conjugated Materials for Organic Electronics

Author

De Luca, Giovanna, primary, Pisula, Wojciech, additional, Credgington, Dan, additional, Treossi, Emanuele, additional, Fenwick, Oliver, additional, Lazzerini, Giovanni Mattia, additional, Dabirian, Reza, additional, Orgiu, Emanuele, additional, Liscio, Andrea, additional, Palermo, Vincenzo, additional, Müllen, Klaus, additional, Cacialli, Franco, additional, and Samorì, Paolo, additional

Published
2011
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8. Self‐Assembled Conjugated Thiophene‐Based Rotaxane Architectures: Structural, Computational, and Spectroscopic Insights into Molecular Aggregation

Author

Zalewski, Leszek, primary, Brovelli, Sergio, additional, Bonini, Massimo, additional, Mativetsky, Jeffrey M., additional, Wykes, Michael, additional, Orgiu, Emanuele, additional, Breiner, Thomas, additional, Kastler, Marcel, additional, Dötz, Florian, additional, Meinardi, Francesco, additional, Anderson, Harry L., additional, Beljonne, David, additional, Cacialli, Franco, additional, and Samorì, Paolo, additional

Published
2010
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11. White Electroluminescence by Supramolecular Control of Energy Transfer in Blends of Organic-Soluble Encapsulated Polyfluorenes

Author

Brovelli, Sergio, primary, Meinardi, Francesco, additional, Winroth, Gustaf, additional, Fenwick, Oliver, additional, Sforazzini, Giuseppe, additional, Frampton, Michael J., additional, Zalewski, Leszek, additional, Levitt, James A., additional, Marinello, Francesco, additional, Schiavuta, Piero, additional, Suhling, Klaus, additional, Anderson, Harry L., additional, and Cacialli, Franco, additional

Published
2010
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13. Synthesis and Optoelectronic Properties of Nonpolar Polyrotaxane Insulated Molecular Wires with High Solubility in Organic Solvents

Author

Frampton, Michael J., primary, Sforazzini, Giuseppe, additional, Brovelli, Sergio, additional, Latini, Gianluca, additional, Townsend, Emily, additional, Williams, Charlotte C., additional, Charas, Ana, additional, Zalewski, Leszek, additional, Kaka, Naeem S., additional, Sirish, Mallena, additional, Parrott, Lisa J., additional, Wilson, Joanne S., additional, Cacialli, Franco, additional, and Anderson, Harry L., additional

Published
2008
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