The CPFs. (IMAGE) The Hong Kong Polytechnic University Caption a,b, Schematic diagram of the CPFs. When the CPFs are slowly lifted out of the liquid, the single-rod-connected capturers capture and retain liquid (a), while double-rod-connected releasers release their imbibed liquid (b). c, Liquid can be captured and retained as the capturers are lifted from the liquid. d, The releasers release their liquid when they are lifted from the liquid. e, The 3D liquid array is prepared using a capturer array. f, The 3D releaser array still releases the liquid. The liquid in c–f is blue-dyed water. Scale bars, 2 mm. Credit © 2024 Research and Innovation Office, The Hong Kong Polytechnic University. All Rights Reserved. Usage Restrictions Nil 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.