title: Acoustically bound microfluidic bubble crystals.
abstract: Bubbles confined in microchannels self-organize without directly contacting one another when excited by an external acoustic field. The bubbles tend to form periodic "crystal"-like lattices with a finite interbubble distance. This equilibrium distance can be adjusted by simply tuning the acoustic frequency. This new type of crystal is purely mediated by acoustic surface waves emitted by the pulsating bubbles. Because these waves are reflected at the channel boundaries, the bubbles interact with their own images across the boundary.
authors.affiliation: CNRS & Université de Grenoble, UMR 5588, Laboratoire Interdisciplinaire de Physique, Grenoble, F-38041, France.
authors.forename: David
authors.initials: D
authors.lastname: Rabaud
authors.forename: Pierre
authors.initials: P
authors.lastname: Thibault
authors.forename: Mylène
authors.initials: M
authors.lastname: Mathieu
authors.forename: Philippe
authors.initials: P
authors.lastname: Marmottant