Research Interests:
Microfluidics, nanofluidics, lab-on-a-chip, electrokinetics
Short Synopsis:
The laboratory focuses on both fundamental as well as application-oriented research towards the development of novel micro- and nano-fluidic devices, involving primarily electrokinetic actuation. The latter include applications areas such as energy (e.g. micro-heat exchangers), healthcare (e.g. Lab-on-a-chip, On-chip electroporation, Dielectrophoretic sorting) and other (e.g. nanochannel sensors).
Current funded (MOST TASHTYOT) collaboration with Prof. Shulamit Levenberg (Technion) and Prof. Dan Peer (TAU) – “A microfluidic System-On-a-Chip platform for parallel single cell screening and analysis based on dielectrophoresis, nanobeads and nanoliter droplets”.
G. Yossifon and H.-C. Chang, Selection of Non-Equilibrium Over-Limiting Currents: Universal Depletion Layer Formation Dynamics and Vortex Instability, Phys. Rev. Lett. 101, 254501 (2008).
H.-C. Chang and G. Yossifon, Understanding Electrokinetics at the Nanoscale: A Perspective, Biomicrofluidics 3, 012001 (2009).
G. Yossifon, Y.-C. Chang and H.-C. Chang, Rectification, Gating Voltage and Interchannel Communication of Nanoslot Arrays Due to Asymmetric Entrance Space Charge Polarization, Phys. Rev. Lett. 103, 154502 (2009).
G. Yossifon, P. Mushenheim and H.-C. Chang, Eliminating the Limiting-Current Phenomenon by Geometric Field Focusing into Nanopores and Nanoslots, Phys. Rev. E 81 046301 (2010).
G. Yossifon and H.-C. Chang, Changing Nanoslot Ion Flux with a Dynamic Nanocolloid Ion-Selective Filter: Secondary Overlimiting Currents due to Nanocolloid-Nanoslot Interaction, Phys. Rev. E, 81, 066317 (2010).
H.-C. Chang, G. Yossifon, Nano-Scale Electrokinetics and Micro-Vortices: How Micro-Hydrodynamics affects Ion Flux through Nanopores and Membranes, Annual Review of Fluid Mechanics, 44, 401-26 (2012).
J. Schiffbauer and G. Yossifon, The Role of Electro-osmosis in the Impedance Response of Microchannel-Nanochannel Interfaces, Phys. Rev. E, 86, 056309-1-9 (2012).
Y. Green and G. Yossifon, Dynamical Trapping of Colloids at the Stagnation Points of Electro-Osmotic Vortices of the Second Kind, Phys. Rev. E. 87, 033005 (2013).
J. Schiffbauer, S. Park and G. Yossifon, Electrical Impedance Spectroscopy of Microchannel-Nanochannel Interface Devices, Physical Review Letters, in press.
L. Rozitsky, A. Fine, D. Dado, S. N.-B. Shaul, S. Levenberg, G. Yossifon, Quantifying Continuous-Flow Dielectrophoretic Trapping of Cells and Micro-Particles on Micro-Electrode Array, Biomedical Microdevices, in press.