Figure 5.

SEM images of hESCs on various substrates. SEM images of (a) cells cultured on PLO exhibiting a flat morphology and two-dimensional axonal connections, (b) cells cultured on silk scaffolds demonstrating three-dimensional structures and cell migration, and (c) cells cultured on silk-CNT scaffolds demonstrating three-dimenstional axonal connections and silk-CNT matrix degradation.

Chen et al. Nanoscale Research Letters 2012 7:126   doi:10.1186/1556-276X-7-126
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