image: This image is an overlay of time-lapse optical images showing the unusual particle separation of a self-healing, free-standing liquid membrane. This material relates to a paper that appeared in the Aug. 22, 2018, issue of Science Advances, published by AAAS. The paper, by Birgitt Boschitsch Stogin at Pennsylvania State University, University Park, Pa., and colleagues was titled, "Free-standing liquid membranes as unusual particle separators." view more
Credit: [Credit: Birgitt Boschitsch Stogin and Tak-Sing Wong, Penn State]