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Fig. 6 | Nanoscale Research Letters

Fig. 6

From: Growth of a Novel Nanostructured ZnO Urchin: Control of Cytotoxicity and Dissolution of the ZnO Urchin

Fig. 6

SEM images of MDCK cells after 7-day growth on the substrates. The different substrates presented the following: a Si, b Si + Au, and cf Si + Au + ZnO urchin2. a, b A confluent layer of cells was formed on the surface of both the reference materials (cell growth was not affected). cf Individual cells rather than a confluent layer are present on the Si + Au + ZnO urchin 2 nanostructured substrate. Note: A layer of proteins (either from cell culture medium, or from cell debris) is formed around the individually attached cells

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