DESCRIPTION OF THE GROUP

The Laboratory of Surface Physicochemistry conducts research on physicochemical phenomena occurring on interfaces. The main fields of studies include:

  • processes of sorption chemistry and physical adsorption of organic molecules, including biologically important compounds, on surfaces of solids;
  • research on structure and biomimetic properties of lipid layers on solid substrates and on interface between water and air;
  • interactions of molecules of biological importance with model lipid membranes;
  • design of molecular bindings metal-molecule-metal;
  • structure and properties of lipid films and their interactions with antibiotic peptides and lipopeptides.

At the Laboratory of Surface Physicochemistry researchers study structure of lipid layers on solid substrates in nanoscale. They look for correlations between particular properties of lipid films (structure, adhesion, elasticity) and their composition. Studied correlations help to understand functional mechanisms of cellular membranes.


GROUP MEMBERS

Sławomir Sęk D.Sc.

THE LEADER OF THE GROUP

TEAM

Sławomir Sęk D.Sc.
e-mail:slasek@chem.uw.edu.pl
Phone +48 22 55 26661,
room 4.24 CNBCh UW

Joanna Juhaniewicz Ph.D.
Jan Pawłowski M.Sc.

RESEARCH ACTIVITIES

Nowadays, miniaturization of electrical appliances is one of the most important and the quickest to develop branches of nanotechnology. Designing, synthesis and characteristics of new nanostructural biomaterials is crucial for development of new technologies such as molecular wires, diodes, transistors and molecular switches. One of the most promising candidates for construction of the above-listed items are peptide chains. This research group focuses on electrical properties of helical peptides.

The group is equipped with modern research instruments, including STM microscope with spectroscopic modes current-voltage and current-distance, AFM microscopes with modes C-AFM, tapping mode AFM, CS-AFM, EFM, MFM, KFM. Moreover, there is a possibility of work under full electrochemical control.

Research services

Surface analyses with scanning probe microscopy including: scanning tunneling microscopy (STM) with spectroscopic modes (current-voltage, current-distance), conductive sample imaging with high resolution, atomic force microscopy (AFM) – in contact (C-AFM) and non-contact (AC-AFM) modes, with possibility of imaging and thickness measurements of organic layers sorbed on solid substrates, chemical force microscopy (CFM) – work with modified probes possible. Furthermore, there are possibilities of analysing interactions between antibody and antigen or receptor and ligand, work with conductive atomic force microscopy (CS-AFM), and simultaneous measurement of the sample topography and conductivity. Other types of atomic force microscopy can also be used e.g. electrostatic force microscopy (EFM), magnetic force microscopy (MFM) or Kelvin force microscopy (KFM). Prices of services are determined individually after preliminary assessment of analysis and depending on the number of samples. Moreover, prices depend on the type and number of STM/AFM probes necessary for analysis.