Modeling of polyelectrolytes
- Polyelectrolyte solutions and gels
- Coarse-grained simulations
- Mean-field and Poisson-Boltzmann modeling
- pH-dependent properties
- Collaborators: Christian Holm (Stuttgart)
The Soft Matter Group, headed by Professor Miroslav Štěpánek, is a part of the Department of Physical and Macromolecular Chemistry of the Charles University in Prague. Our interdisciplinary research very much sits at the interface between physics and chemistry of macromolecules and biomacromolecules. It includes study of solutions of both synthetic and biological macromolecules; their thermodynamic and kinetic properties, such as self assembly, aggregation, diffusion, etc.
We also study mechanisms of (surface) plasmon-enhanced optical processes in molecules and of reactions undergone by molecules on surfaces of nanoparticles (NPS) in plasmonic NPs-molecules hybrid systems, with focus on the photochemical and the plasmon-mediated reactions; optimization and utilization of methods of molecular spectroscopy based on (surface) plasmon enhanced optical processes.
For studies of these systems, we use methods, such as light, X-ray and neutron scattering, calorimetry, TEM, AFM, SERS (surface-enhanced Raman scattering), SERRS (surface-enhanced resonance Raman scattering), SEL (surface-enhanced luminescence), SEIRA (surface-enhanced infrared absorption) and computer modelling.
If you are interested in joining our group, as a graduate or undergraduate student, or as a postdoctoral fellow, please see the page open positions
Detection of target adsorbates at ultralow concentrations and/or on a single molecule level. Design and preparation of substrates providing high SERS enhancement.
SERS and SERRS spectral studies of formation, dynamics and decomposition of transition metal-adsorbate complexes on the surface of plasmonic metal nanoparticles. SERS and SERRS spectral monitoring of free-base porphyrin metallation ...
Synthesis and morphological as well as optical characterization of mono-and bi-metallic plasmonic metal (mainly Ag and Au) nanoparticles. Preparation of their hybrid systems with selected molecules, namely porphyrins, phthalocyanines transition ...
Comparison of the mechanisms of SERS, SERRS and SEL. Tayloring of plasmonic metal substrates for SERRS or SEL of a particular chromophore/luminophore.