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Massive Electro-Microfluidic Particle Assembly Patterns in Droplet Array for Information Encoding
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DOI：10.1002/smll.202405161.png)
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Abstract
En 中文
The 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. A novel electro-microfluidic assembly colloidal particle droplet array platform is developed, featuring large-scale, rapidly reversible assemblies. This platform encodes precise information within individual droplets via addressable electrodes beneath them. Moreover, it can create dynamic informative droplet arrays and offer significant potential for anti-counterfeiting applications as an advanced electronic token. image
Keywords:
dielectrophoresis
droplet array
electro-microfluidic
information encoding
particle assembly
Journal
IF:
12.1
Papers:
3.0W
Citations:
16.4W