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We developed a simple two-step replication method to transfer arrays of high aspect ratio nanopillars into films of poly(l-d,l-lactic acid) (PLLA). Such structures are promising model surfaces for tissue engineering applications. From arrays of 1μm high and 200nm wide pillars produced with e-beam lithography and reactive ion etching negative replicas were first formed by polydimethylsiloxane (PDMS)...
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