When a low-viscosity fluid displaces into a higher viscosity fluid, the liquid-liquid interface becomes unstable causing finger-like patterns. These patterns are usually observed in two fluids, but here Kim et al. describes the development of fingers in a single polyelectrolyte fluid adjacent to a charge-selective interface under the influence of a potential gradient.
- Jeonghwan Kim
- Joonhyeon Kim
- Rhokyun Kwak
