Affiliation:
1. International Joint Laboratory of Optofluidic Technology and System (LOTS) National Center for International Research on Green Optoelectronics South China Academy of Advanced Optoelectronics South China Normal University Guangzhou 510006 P. R. China
2. Guangdong Basic Research Center of Excellence for Structure and Fundamental Interactions of Matter, Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices School of Information and Optoelectronic Science and Engineering South China Normal University Guangzhou 510006 P. R. China
3. School of Electronic Information University of Electronic Science and Technology of China Zhongshan Institute Zhongshan 528402 P. R. China
4. Key Laboratory of Environmental Medicine and Engineering Ministry of Education Department of Nutrition and Food Hygiene School of Public Health Southeast University Nanjing 210009 P. R. China
Abstract
AbstractThe assembly of colloidal particles into micro‐patterns is essential in optics, informatics, and microelectronics. However, it is still a challenge to achieve quick, reversible, and precise assembly patterns within micro‐scale spaces like droplets. Hereby, a method is presented that utilizes in‐plane dielectrophoresis to precisely manipulate particle assemblies within microscale droplets. The electro–microfluidic particle assembly platform, equipped with ingenious electrode designs, enables the formation of diverse micro‐patterns within a droplet array. The tunability, similarity, stability, and reversibility of this platform are demonstrated. The ability to assemble letters, numbers, and Morse code patterns within the droplet array underscores its potential for information encoding. Furthermore, using an example with four addressing electrodes beneath a droplet, 16 distinct pieces of information through electrical stimuli is successfully encoded. This unique capability facilitates the construction of a dynamic electronic token, indicating promising applications in anti‐counterfeiting technologies.
Funder
Special Project for Marine Economy Development of Guangdong Province