  We report the behavior of particle-stabilized bubbles (armored bubbles) when
exposed to various classes and concentrations of surfactants. The bubbles are
non-spherical due to the jamming of the particles on the interface and are
stable to dissolution prior to the addition of surfactant. We find that the
dissolving bubbles exhibit distinct morphological, microstructural, and
lifetime changes, which correlate with the concentration of surfactant
employed. For low concentrations of surfactant an armored bubble remains
non-spherical while dissolving, while for concentrations close to and above the
surfactant CMC a bubble reverts to a spherical shape before dissolving. We
propose a microstructural interpretation, supported by our experimental
observations of particle dynamics on the bubble interface, that recognizes the
role of interfacial jamming and stresses in particle stabilization and
surfactant-mediated destabilization of armored bubbles.
