Skip to main content
search
All Posts By

Ion Distribution in Quaternary-Ammonium-Functionalized Aromatic Polymers: Effects on the Ionic Clustering and Conductivity of Anion-Exchange Membranes

Weiber, E. Annika; Jannasch, Patric

 Customer publications

Ion Distribution in Quaternary-Ammonium-Functionalized Aromatic Polymers: Effects on the Ionic Clustering and Conductivity of Anion-Exchange Membranes

Weiber, E. Annika; Jannasch, Patric

A series of copoly(arylene ether sulfone)s that have precisely two, three, or four quaternary ammonium (QA) groups clus- tered directly on single phenylene rings along the backbone are studied as anion-exchange membranes. The copolymers are synthesized by condensation polymerizations that involve either di-, tri-, or tetramethylhydroquinone followed by virtual- ly…
Bioinspired Reversibly Cross-linked Hydrogels Comprising Polypeptide Micelles Exhibit Enhanced Mechanical Properties

Ghoorchian, Ali; Simon, Joseph R.; Bharti, Bhuvnesh; Han, Wei; Zhao, Xuanhe; Chilkoti, Ashutosh; López, Gabriel P.

 Customer publications

Bioinspired Reversibly Cross-linked Hydrogels Comprising Polypeptide Micelles Exhibit Enhanced Mechanical Properties

Ghoorchian, Ali; Simon, Joseph R.; Bharti, Bhuvnesh; Han, Wei; Zhao, Xuanhe; Chilkoti, Ashutosh; López, Gabriel P.

Advanced Functional Materials, 2015, DOI:Visit the full articleBack to the overview
Simultaneous Enhancement of Solar Cell Efficiency and Stability by Reducing the Side Chain Density on Fluorinated PCPDTQx Copolymers

Verstappen, Pieter; Kesters, Jurgen; D’Olieslaeger, Lien; Drijkoningen, Jeroen; Cardinaletti, Ilaria; Vangerven, Tim; Bruijnaers, Bardo J.; Willems, Robin EM; D’Haen, Jan; Manca, Jean V.; others

 Customer publications

Simultaneous Enhancement of Solar Cell Efficiency and Stability by Reducing the Side Chain Density on Fluorinated PCPDTQx Copolymers

Verstappen, Pieter; Kesters, Jurgen; D’Olieslaeger, Lien; Drijkoningen, Jeroen; Cardinaletti, Ilaria; Vangerven, Tim; Bruijnaers, Bardo J.; Willems, Robin EM; D’Haen, Jan; Manca, Jean V.; others

The performance of polymer solar cells is strongly dependent on the morphology of the photoactive layer, which can be optimized by tuning the polymer side chain pattern. Whereas most studies focus on length and bulkiness, the side chain density receives much less attention. In this work, the effect of the…
Self-assembly of designed coiled coil peptides studied by small-angle X-ray scattering and analytical ultracentrifugation

Malik, Leila; Nygaard, Jesper; Christensen, Niels J.; Streicher, Werner W.; Thulstrup, Peter W.; Arleth, Lise; Jensen, Knud J.

 Customer publications

Self-assembly of designed coiled coil peptides studied by small-angle X-ray scattering and analytical ultracentrifugation

Malik, Leila; Nygaard, Jesper; Christensen, Niels J.; Streicher, Werner W.; Thulstrup, Peter W.; Arleth, Lise; Jensen, Knud J.

α-Helical coiled coil structures, which are noncovalently associated heptad repeat peptide sequences, are ubiquitous in nature. Similar amphipathic repeat sequences have also been found in helix-containing proteins and have played a central role in de novo design of proteins. In addition, they are promising tools for the construction of nanomaterials.…
Structural disordering of de-alloyed Pt bimetallic nanocatalysts: the effect on oxygen reduction reaction activity and stability

Spanos, Ioannis; Dideriksen, Knud; Kirkensgaard, Jacob J. K.; Jelavic, Stanislav; Arenz, Matthias

 Customer publications

Structural disordering of de-alloyed Pt bimetallic nanocatalysts: the effect on oxygen reduction reaction activity and stability

Spanos, Ioannis; Dideriksen, Knud; Kirkensgaard, Jacob J. K.; Jelavic, Stanislav; Arenz, Matthias

Platinum bimetallic alloys are well-known for their ability to catalyze the oxygen reduction reaction (ORR) in proton exchange membrane fuel cells (PEMFCs). PtxCo1−x colloidal nanoparticles were synthesized with varying initial Pt:Co ratios, but constant size to investigate how the initial metal composition affects their electrocatalytic performance. The results show that…
Core-shell TiO 2@ C: towards alternative supports as replacement for high surface area carbon for PEMFC catalysts

Zana, Alessandro; Ruediger, Celine; Kunze-Liebhaeuser, Julia; Granozzi, Gaetano; Reeler, Nini EA; Vosch, Tom; Kirkensgaard, Jacob JK; Arenz, Matthias

 Customer publications

Core-shell TiO 2@ C: towards alternative supports as replacement for high surface area carbon for PEMFC catalysts

Zana, Alessandro; Ruediger, Celine; Kunze-Liebhaeuser, Julia; Granozzi, Gaetano; Reeler, Nini EA; Vosch, Tom; Kirkensgaard, Jacob JK; Arenz, Matthias

Electrochimica Acta, 2014, vol 139pp. 21–28DOI:Visit the full articleBack to the overview
Surface Chemistry of “Unprotected” Nanoparticles: A Spectroscopic Investigation on Colloidal Particles

Schrader, Imke; Warneke, Jonas; Neumann, Sarah; Grotheer, Sarah; Swane, Andreas Abildgaard; Kirkensgaard, Jacob J. K.; Arenz, Matthias; Kunz, Sebastian

 Customer publications

Surface Chemistry of “Unprotected” Nanoparticles: A Spectroscopic Investigation on Colloidal Particles

Schrader, Imke; Warneke, Jonas; Neumann, Sarah; Grotheer, Sarah; Swane, Andreas Abildgaard; Kirkensgaard, Jacob J. K.; Arenz, Matthias; Kunz, Sebastian

The preparation of colloidal nanoparticles in alkaline ethylene glycol is a powerful approach for the preparation of model catalysts and ligand-functionalized nanoparticles. For these systems the term ?unprotected? nanoparticles has been established because no strongly binding stabilizers are required to achieve stable colloids. Irrespective of this fact, the particles must…
Shear and Rapeseed Oil Addition Affect the Crystal Polymorphic Behavior of Milk Fat

Kaufmann, Niels; Kirkensgaard, Jacob J. K.; Andersen, Ulf; Wiking, Lars

 Customer publications

Shear and Rapeseed Oil Addition Affect the Crystal Polymorphic Behavior of Milk Fat

Kaufmann, Niels; Kirkensgaard, Jacob J. K.; Andersen, Ulf; Wiking, Lars

The effect of shear on the crystallization kinetics of anhydrous milk fat (AMF) and blends with 20 and 30 % w/w added rapeseed oil (RO) was studied. Pulse 1H NMR was used to follow the α to β′ polymorphic transition. The NMR method was confirmed and supported by SAXS/WAXS experiments.…
Close Menu