Signals generated using WRAP method (IMAGE) City University of Hong Kong Caption Demonstration of potential of WRAP method in enhancing the sensitivity of biomedical analysis. Without magnetic actuation, some microdroplets randomly coalesce and showed fluorescence signals that were randomly distributed and were barely above noise level (left image). With magnetic actuation, all the microdroplets coalesce to form a lattice pattern, showing strong and regularly distributed fluorescence signals (right image). Credit Jianqiang Zhang et al./DOI number: 10.1038/s41467-021-27503-1 Usage Restrictions Image must be used with appropriate caption and credit. License Licensed 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.