Binary Mixtures

In the frame work of the DFG-Project BL555-3, we investigate the special properties of binary mixtures in complex plasmas. So far, complex plasma studies concentrated on monodisperse micro-particles which turned out to be an excellent model system for strong coupling. Systems with two different particle species (i.e. with different charge) are called binary mixtures. In complex plasmas all experiments so far show that the two particle species instantaneously demix. Our recent experiments however show that it is possible to create binary mixtures. This opens unique opportunities to study structural and dynamical phenomena in strongly coupled systems. Normal modes, waves, phase transitions, transport processes and heat conduction are just a few examples which can be addressed for the first time in binary mixture experiments. Therefore, this project aims at a systematic characterization of the structural and dynamical properties of binary mixtures in complex plasmas.

  • Frank Wieben and Dietmar Block, Photophoretic force measurement on microparticles in binary complex plasmas, Physics of Plasmas 25, 123705 (2018); https://doi.org/10.1063/1.5078561

  • Frank Wieben, Jan Schablinski, and Dietmar Block, Generation of two-dimensional binary mixtures in complex plasmas, Physics of Plasmas 24, 033707 (2017); https://doi.org/10.1063/1.4977989