M. Knaapila

An effect of side chain length on the solution structure of poly(9,9-dialkylfluorene)s in toluene (2008)

Knaapila, M., Almasy, L., Haramus, V.M., Ramos, M.L., Justino, L.L.G., Scherf, U., ...

The effect of side chain length of π-conjugated poly(9,9-dialkylfluorene)s has been studied in semi-dilute (10 mg/mL) toluene solutions using small-angle neutron scattering (SANS) and 1H and 2H NMR...

Control over phase behavior and solution structure of hairy-rod polyfluorene by means of side-chain length and branching (2008)

Knaapila, M., Stepanyan, R., Torkkeli, M., Haramus, V.M., Galbrecht, F., Nehls, B.S., ...

We present guidelines on how the solution structure of pi-conjugated hairy-rod polyfluorenes is controlled by the side-chain length and branching. First, the semiquantitative mean-field theory is...

Polarized optical absorption spectroscopy, NEXAFS, and GIXRD measurements of chain alignment in polyfluorene thin films (2008)

H. Cheun, X. Liu, F.J. Himpsel, M. Knaapila, U. Scherf, ...

Journal article

Evidence for 21-Helicity of Poly[9,9-bis(2-ethylhexyl)fluorene] (2007)

M. Knaapila, M. Torkkeli, A.P. Monkman

Journal article

Interaction between the Conjugated Polyelectrolyte Poly{1,4-phenylene[9,9-bis(4-phenoxybutylsulfonate)]fluorene-2,7-diyl} Copolymer and the Lecithin Mimic 1-O-(L-Arginyl)-2,3-O-dilauroyl-sn-glycerol in Aqueous Solution (2006)

Tapia, MJ, Burrows, D, Knaapila, M, Monkman, AP, Arroyo, A, Pradhan, S, ...

Influence of Star-Like Iridium Complexes in the Graphoepitaxy of Polyfluorene Thin Films (2006)

M. Knaapila, M. Torkkeli, B.P. Lyons, ...

Journal article

Towards General Guidelines for Aligned, Nanoscale Assemblies of Hairy-Rod Polyfluorene (2006)

M. Knaapila, R. Stepanyan, B.P. Lyons, M. Torkkeli, A.P. Monkman

Journal article

Influence of molecular weight on the surface morphology of aligned, branched side-chain polyfluorene. (2005)

Knaapila, M., Lyons, B. P., Hase, T. P. A., Pearson, C., Petty, M. C., Bouchenoire, L., ...

The surface structure of uniaxially aligned poly(9,9-bis(ethylhexyl)-fluorene-2,7-diyl) films on rubbed polyimide has been studied as a function of molecular weight (Mn = 3-150 kg mol-1,...

Influence of molecular weight on the phase behavior and structure formation of branched side-chain hairy-rod polyfluorene in bulk phase. (2005)

Knaapila, M., Stepanyan, R., Torkkeli, M., Lyons, B.P., Ikonen, T.P., Almasy, L., ...

We report on an experimental study of the self-organization and phase behavior of hairy-rod pi-conjugated branched side-chain polyfluorene, poly[9,9-bis(2-ethylhexyl)-fluorene-2,7-diyl]¿i.e.,...

The influence of the molecular weight on the thermotropic alignment and selforganized structure formation of branched side chain hairy-rod polufluorence in thin films (2005)

Knaapila, M., Stepanyan, R., Lyons, B.P., Torkkeli, M., Hase, T.P.A., Serimaa, R., ...

Influence of molecular weight on the phase behavior and structure formation of branched side-chain hairy-rod polyfluorene in bulk phase. (2005)

Knaapila, M., Stepanyan, Dr. R., Torkkeli, M., Lyons, B.P., Ikonen, T.P., Almasy, L., ...

We report on an experimental study of the self-organization and phase behavior of hairy-rod pi-conjugated branched side-chain polyfluorene, poly[9,9-bis(2-ethylhexyl)-fluorene-2,7-diyl]¿i.e.,...

Influence of molecular weight on the phase behavior and structure formation of branched side-chain hairy-rod polyfluorene in bulk phase. (2005)

Knaapila, M., Stepanyan, R., Torkkeli, M., Lyons, B.P., Ikonen, T.P., Almasy, L., ...

We report on an experimental study of the self-organization and phase behavior of hairy-rod pi-conjugated branched side-chain polyfluorene, poly[9,9-bis(2-ethylhexyl)-fluorene-2,7-diyl]¿i.e.,...

Influence of molecular weight on self-organization, uniaxial alignment and surface morphology of hairy-rodlike polyfluorene in thin films (2004)

Knaapila, M., Kisko, K., Lyons, G.M., Stepanyan, R., Foreman, J.P., Seeck, O.H., ...

Influence of Molecular Weight on Self-Organisation, Uniaxial Alignment, and Surface Morphology of Hairy-Rodlike Polyfluorene in Thin Films (2004)

Knaapila, M., Kisko, K., Lyons, B. P., Stepanyan, R., Foreman, J. P., Seeck, O. H., ...

Phase behavior and structure formation of hairy-rod supramolecules (2003)

Subbotin, A., Stepanyan, R., Knaapila, M., Ikkala, O., Brinke, G. Ten

Phase behavior and microstructure formation of rod and coil molecules, which can associate to form hairy-rod polymeric supramolecules, are addressed theoretically. Association induces considerable...

Diffraction analysis of highly ordered smectic supramolecules of conjugated rodlike polymers (2003)

Knaapila, M., Torkkeli, M., Jokela, K., Kisko, K., Horsburgh, L.E., Pålsson, L-O., ...

A small/wide-angle X-ray scattering and grazing incidence diffraction study of comb-shaped supramolecules of conjugated poly(2,5-pyridinediyl), acid dopant and hydrogen bonded amphiphilic side chains...

Self-Organization of Hairy-Rod Polymers (2003)

Stepanyan, R., Subbotin, A., Knaapila, M., Ikkala, O., Brinke, G. Ten

Self-organized structure formation in the melt of hairy-rod polymers is analyzed theoretically. It is shown that the interplay between unfavorable repulsive rod-coil interactions and stretching of...

Processible conducting nanoscale cylinders due to self-organized polyaniline supramolecules (2003)

Kosonen, H., Valkama, S., Ruokolainen, J., Knaapila, M., Torkkeli, M., Serimaa, R., ...

Polyaniline sulphonates contain hydrogen bonding acceptor sites, which allow construction of supramolecules and self-organized structures. Here we have characterized the phase behavior of complexes...

X-ray Diffraction Studies of Multiple Orientation in Poly(9,9-bis(2-ethylhexyl)fluorene-2,7-diyl) Thin Films (2003)

Knaapila, M., Lyons, B. P., Kisko, K., Foreman, J. P., Vainio, U., Mihaylova, M., ...

Diffraction analysis of highly ordered smectic supramolecules of conjugated rodlike polymers (2003)

Knaapila, M., Torkkeli, M., Jokela, K., Kisko, K., Horsburgh, L. E., ...

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Self-assembled structure of hydrophobins HFBI and HFBII (2003)

Ritva, S., Torkkelli, M., Paananen, A., Linder, M., Kisko, K., Knaapila, M., ...

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Polarized luminescence from self-assembled, aligned, and cleaved supramolecules of highly ordered rodlike polymers (2002)

Knaapila, M., Ikkala, O., Torkkeli, M., Jokela, K., Serimaa, R., Dolbnya, I.P., ...

A hierarchical self-assembly in comb-shaped supramolecules of conjugated rodlike polymers is reported. The supramolecules consist of poly(2,5-pyridinediyl), acid dopants, and hydrogen bonded alkyl...

Intermediate Segregation Type Chain Length Dependence of the Long Period of Lamellar Microdomain Structures of Supramolecular Comb-Coil Diblocks (2001)

Polushkin, E., Knaapila, M., Ruokolainen, J., Torkkeli, M., Serimaa, R., ...

A characteristic intermediate segregation type chain length dependence of the long period D of the lamellar microdomain structure of a class of comb-coil supramolecules is reported. The...

Self-organized supramolecules of poly(2,5-pyridinediyl) (2001)

Knaapila, M., Ruokolainen, J., Torkkeli, M., Serimaa, R., Horsburgh, L., Monkman, A.P., ...

Polypyridines are remarkably stable and good charge transport materials having high photoluminescence quantum yield. They form supramolecules that form lamellar self-organized structures due to...

Self-organized supermolecules based on conducting polyaniline and hydrogen bonded amphiphiles (2001)

Kosonen, H., Ruokolainen, J., Knaapila, M., Torkkeli, M., Serimaa, R., Bras, W., ...

We describe a concept to achieve comb-like supermolecules by hydrogen bonding camphor sulphonic acid (CSA) doped polyaniline (PANI) to 4-Hexyl resorcinol (Hres). The supermolecules, in turn,...