Image (IMAGE) The University of Hong Kong Caption Left: Approximately 5,000 microfibers are collected in the container. Right: Coiling of a nonuniform microfiber with axially varied elastic modulus. As the fiber coils in the microfluidic device, it forms a spiral with a varying coiling radius that reflects the local elastic modulus. The higher the local elastic modulus, the larger the coiling radius of that segment. (Pictures are reproduced under the terms of the CC-BY license.) [Proc. Natl. Acad. Sci. U.S.A. 121, e2303679121, 2024] Credit The University of Hong Kong Usage Restrictions n/a License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.