Micropatterns of cells were generated on a cyclic olefin copolymer (COC) by a combination of aryl‐azide‐based photopatterning of a polymerization initiator and surface‐initiated atom‐transfer radical polymerization of non‐biofouling 3‐(methacryloylamino)propyl)‐dimethyl(3‐sulfopropyl)ammonium hydroxide (MPDSAH). The optical transparency of the COC made it possible to generate the patterns indirectly through a COC slab.
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