Search for an Instability on a Quenched-Liquid Interface

We searched for signs of an instability on the interface between the two phases of a binary-liquid mixture, isobutyric acid and water, after the mixture was quenched further into the two-phase region. Such an instability would be the liquid-liquid analog of the Mullins-Sekerka instability seen in quenched alloys. Never is any dramatic growth observed, but under conditions of small dimensionless quench depth (theta\u3c1.5×10−3), the intensity of light scattered from the interface grows for small values of the momentum transfer k