  When stretched uniaxially, a thin elastic sheet may exhibit buckling. The
occurrence of buckling depends on the geometrical properties of the sheet and
the magnitude of the applied strain. Here we show that an elastomeric sheet
initially stable under uniaxial stretching can destabilize when exposed to a
solvent that swells the elastomer. We demonstrate experimentally and
computationally that the features of the buckling pattern depend on the
magnitude of stretching, and this observation offers a new way for controlling
the shape of a swollen homogeneous thin sheet.
