In: Materials and Structures, 2014, vol. 47, no. 9, p. 1559-1571
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In: Journal of Fluorescence, 2007, vol. 17, no. 6, p. 759-765
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In: Physical Review Letters, 2014, vol. 112, no. 17, p. 173003
X-ray emission spectra recorded in the off-resonant regime carry information on the density of unoccupied states. It is known that by employing the Kramers-Heisenberg formalism, the high energy resolution off-resonant spectroscopy (HEROS) is equivalent to the x-ray absorption spectroscopy (XAS) technique and provides the same electronic state information. Moreover, in the present Letter we...
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In: Supramolecular Chemistry, 2014, vol. 26, no. 2, p. 125–137
The thermotropic properties and self-assembly of two different series of hexa-peri-hexabenzocoronenes (HBC) bearing either linear or branched perfluoroalkylated side chains, each with a wide range of alkyl spacer and perfluorinated tail lengths, have been studied. Correlations between thermogravimetric analysis, differential scanning calorimetry, polarised optical microscopy and small-angle X-ray...
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In: ACS Nano, 2014, vol. 8, no. 4, p. 3451–3460
A major contemporary concern in developing effective liposome–nanoparticle hybrids is the present inclusion size limitation of nanoparticles between vesicle bilayers, which is considered to be around 6.5 nm in diameter. In this article, we present experimental observations backed by theoretical considerations which show that greater structures can be incorporated within vesicle membranes by...
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Thèse de doctorat : Université de Fribourg, 2011.
This work presents the synthesis of a new perfluorinated sulfonic acid function HBC which car¬ries a sulfonic acid at the end of one perfluorinated side-chain.The aim of the introduction of this sulfonic acid is its ability to form proton channels which could be used as electrolyte in pro¬ton exchange membranes for fuel cells. The channels would be created by the formation of stacks of three...
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In: Synthesis, 2010, vol. 7, p. 1123-1140
Substituted disc-shaped perfluoroalkylated hexa-peri-hexabenzocoronenes (HBC), known to self-assemble into conducting ordered architectures, were synthesized and characterized. A systematic variation of the linear or branched perfluoroalkylated side chains was performed in order to screen the influence of the lateral chain on their one-dimensional self-aggregation.
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In: Macromolecules, 2008, vol. 41, no. 9, p. 3243–3249
This work describes the thermoresponsive transition in polystyrene-block-poly(N-isopropylacrylamide)-block-polystyrene (PS-block-PNIPAM-block-PS) triblock copolymer hydrogels, as observed by both direct and reciprocal space in-situ characterization. The hydrogel morphology was studied in both the dry and wet state, at temperatures below and beyond the coil−globule transition of PNIPAM, using...
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Thèse de doctorat : Université de Fribourg, 2007 ; Nr. 1575.
The possibilities of industry to process and to engineer materials at the nanometer level rapidly increase and products using materials engineered at the nanometer level emerge on the markets. In the long term, it is hardly possible to estimate, from the present point, where the ability to engineer materials on the nano-scale will lead human beings, whether the dream of a molecular nanotechnology...
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Thèse de doctorat : Université de Fribourg, 2004 ; no 1440.
Nanotechnology, a research area that covers many scientific disciplines such as Medicine, Biology, Physics and Chemistry has found a great interest in research institutions and wide applications in industries. This is due to many reasons; from these we note the control down to the molecular level providing thereby a greatest efficiency and an important added value as a reason of the low cost of...
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