The versatile manipulation of droplets across different scales holds significant promise in various fields, particularly in precision chemistry and biomedical diagnostics. From a practical standpoint, effective droplet manipulation techniques necessitate multi-functional integration and applicability across various scales.
Magnetic excitation has gained widespread adoption in the field of droplet manipulation due to its advantages, such as remote controllability, biocompatibility, insensitivity to environmental factors like substrate charge, and excellent transparency. However, expanding the capabilities of magnetically responsive droplet manipulation and extending the diverse functionalities from microliter to nanoliter scales remain formidable challenges.
In response to this challenge, Professor Hu Yanlei and his research team from the Micro/Nano Engineering Laboratory at the University of Science and Technology of China of the Chinese Academy of Sciences , in collaboration with other researchers, developed a magnetically actuated Janus origami robot using femtosecond laser nanofabrication techniques.
This robot enables effective integration of diverse droplet manipulation functionalities, including three-dimensional droplet transport, merging, splitting, precise dispensing, and on-demand release of daughter droplets, as well as stirring and remote heating.. DOI: 10.1038/s41467-023-41092-1 In addition, this manipulation strategy exhibits remarkable stability and allows for the manipulation of droplets spanning volumes from approximately 3.2 nanoliters to about 51.14 microliters. The results of this research, titled"
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