ENGINEERING Correction for “Acoustic trapping of microbubbles in complex environments and controlled payload release,” by Diego Baresch and Valeria Garbin, which was first published June 22, 2020; 10.1073/pnas.2003569117 (Proc. Natl. Acad. Sci. U.S.A. 117, 15490–15496).
The authors note that, due to a printer’s error, the article title for reference 39 appeared incorrectly. The corrected reference appears below.
39. B. T. Unger, P. L. Marston, Optical levitation of bubbles in water by the radiation pressure of a laser beam: An acoustically quiet levitator. J. Acoust. Soc. Am. 83, 970 (1988).