Nature CommunicationsData-driven concavity engineering for magnetic activation in rigid microspheresChang ZhangLongjun RaoLishan WuRuixuan ZhangJiazhuan QinMeichen WenKe PeiHanwen ChengChongyun LiangWenbin YouRenchao Che2026-06-03Full textDOI https://doi.org/10.1038/s41467-026-74017-9