The conference paper “Physiologically relevant microparticles with mechanically tunable properties for acoustophoretic and microfluidic device calibration” from the Darling Lab and collaborators at Draper was recently published in Proceedings of Meetings on Acoustics. This study modified our existing cell mimic particles with lipid nanoparticles that effectively decreased the density of the composite material. This innovation is important for not only matching physiological cell densities but also, from a practical perspective, for keeping the cell mimics suspended in carrier fluids longer without having them settle. Congratulations to lead author Clara Tandar!