TY  - JOUR
A1  - Lange, Maik
A1  - Braune, Steffen
A1  - Luetzow, Karola
A1  - Richau, Klaus
A1  - Scharnagl, Nico
A1  - Weinhart, Marie
A1  - Neffe, Axel T.
A1  - Jung, Friedrich
A1  - Haag, Rainer
A1  - Lendlein, Andreas
T1  - Surface functionalization of poly(ether imide) membranes with linear, methylated oligoglycerols for reducing thrombogenicity
JF  - Macromolecular rapid communications
N2  - Materials for biomedical applications are often chosen for their bulk properties. Other requirements such as a hemocompatible surface shall be fulfilled by suitable chemical functionalization. Here we show, that linear, side-chain methylated oligoglycerols (OGMe) are more stable to oxidation than oligo(ethylene glycol) (OEG). Poly(ether imide) (PEI) membranes functionalized with OGMes perform at least as good as, and partially better than, OEG functionalized PEI membranes in view of protein resistance as well as thrombocyte adhesion and activation. Therefore, OGMes are highly potent surface functionalizing molecules for improving the hemocompatibility of polymers.
KW  - hemocompatibility
KW  - poly(ethylene glycol)
KW  - polyglycerol
KW  - polyimides
KW  - surface chemistry
Y1  - 2012
U6  - https://doi.org/10.1002/marc.201200426
SN  - 1022-1336
VL  - 33
IS  - 17
SP  - 1487
EP  - 1492
PB  - Wiley-VCH
CY  - Weinheim
ER  - 
TY  - JOUR
A1  - Füchsel, Gernot
A1  - Tremblay, Jean Christophe
A1  - Klamroth, Tillmann
A1  - Saalfrank, Peter
T1  - Selective excitation of molecule-surface vibrations in H2 and D2 dissociatively adsorbed on Ru(0001)
JF  - Israel journal of chemistry
N2  - In this contribution we report about the selective vibrational excitation of H2 and D2 on Ru(0001) as an example for nonadiabatic coupling of an open quantum system to a dissipative environment. We investigate the possibility of achieving state-selective vibrational excitations of H2 and D2 adsorbed on a Ru(0001) surface using picosecond infrared laser pulses. The systems behavior is explored using pulses that are rationally designed and others that are optimized using a time-local variant of Optimal Control Theory. The effects of dissipation on the laser-driven dynamics are studied using the reduced-density matrix formalism. The non-adiabatic couplings between adsorbate and surface are computed perturbatively, for which our recently introduced state-resolved anharmonic rate model is used. It is shown that mode- and state-selective excitation can be achieved in the absence of dissipation when using optimized laser pulses. The inclusion of dissipation in the model reduces the state selectivity and the population transfer yield to highly excited states. In this case, mode activation is most effectively realized by a rational pulse of carefully chosen duration rather than by a locally optimized pulse.
KW  - dissipative dynamics
KW  - photochemistry
KW  - quantum control
KW  - surface chemistry
Y1  - 2012
U6  - https://doi.org/10.1002/ijch.201100097
SN  - 0021-2148
VL  - 52
IS  - 5
SP  - 438
EP  - 451
PB  - Wiley-VCH
CY  - Weinheim
ER  - 
TY  - JOUR
A1  - Fandrich, Artur
A1  - Buller, Jens
A1  - Wischerhoff, Erik
A1  - Laschewsky, André
A1  - Lisdat, Fred
T1  - Electrochemical detection of the thermally induced phase transition of a thin stimuli-responsive polymer film
JF  - ChemPhysChem : a European journal of chemical physics and physical chemistry
KW  - cyclic voltammetry
KW  - electrochemical impedance spectroscopy
KW  - polymers
KW  - surface chemistry
KW  - surface plasmon resonance
Y1  - 2012
U6  - https://doi.org/10.1002/cphc.201100924
SN  - 1439-4235
VL  - 13
IS  - 8
SP  - 2020
EP  - 2023
PB  - Wiley-VCH
CY  - Weinheim
ER  -