Researchers at Rice University discovered that magnetic relaxation can be used to precisely control the self-assembly of superparamagnetic beads in materials design. By using alternating magnetic fields, the beads organize into anisotropic structures, which can be tuned for specific properties. The “Pac-Man effect” describes the unique shape formed by the magnetization distribution of the beads, influencing their alignment. This discovery highlights the potential of controlling the interactions between these particles for advanced material applications, with implications for microrobots and targeted drug delivery.
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https://news.rice.edu/news/2024/pac-man-effect-offers-precise-control-advanced-materials-design
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