Experiments

• AG - astrophysics and geophysics
• BK - biophysics and complex systems
• FM - solid state physics and physics of materials
• KT - nuclear physics and particle physics

BK - biophysics and complex systems

• AG.RBK - Rayleigh-Bénard Convection
• BK.ABB - Analysis of Brownian Motion
• BK.CMF - Computational Microfluidics (Digital Lab)
• BK.MDS - Molecular Dynamics Simulations of Proteins
• BK.MIF - Microfluidics
• BK.NLF - Nd:YAG Laser and Second-harmonic generation
• BK.NSE - Nanostructuring by means of Electron Beam Lithography
• BK.OTM - Assembling an optical tweezers microscope
• BK.PKR - Phase Contrast Radiography
• BK.SLM - X-ray reflectivity study of lipid membranes
• BK.STM - STED Microscopy
• BK.TRS - Total Reflection of X-rays and X-ray Reflectivity of Thin Films
• BK.WFS - Wavefront sensor for laser beam and optics characterization

BK.ABB - Analysis of Brownian Motion

During this experiment you will observe and analyze the Brownian movement of small polystyrene beads in water. Using fluorescence and phase contrast one can visualize these particles close to the resolution limit of the microscope. The working principles of these methods are discussed in theory and used practically. Using both methods you will record movies of the moving particles. Video analysis will then be used to extract the tracks of the particles. From this data one can obtain the diffusion constant of the particles and finally their size.