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Schematic illustration of nanomaterial-based microfluidic chips (nanopillar, nanowire, gold nanoparticle, magnetic nanoparticle, graphene oxide, nanofiber and nanoroughened structure) for the capture and detection of circulating tumor cells (CTCs). Reprinted with permission from ref. 34, 67, 70, 75, 87, 88, 95, 96.
