Zheng's paper has been published on Langmuir

We studied the "influence of substrate confinement on the phase-correlation in the capillary breakup of arrays of patterned polymer stripes". For the two extreme cases of viscosity ratios we investigated, in-phase breakup of strongly confined immiscible polymer stripes was always observed, regardless of the specific geometry.This was because the rigid substrate suppressed undulations on the polymer stripes from being developed perpendicularly to the substrate and, therefore, lateral undulations between neighboring stripes became strongly coupled.