Axonal length on PLO, silk, and silk-CNT composite substrates. Axonal length measurements with β-III tubulin fluorescence images. PLO and silk-CNT substrates demonstrated similar axonal length; however, silk scaffolds induce very limited axonal length growth. Double asterisks, P < 0.001; NS, no statistical significance.
Chen et al. Nanoscale Research Letters 2012 7:126 doi:10.1186/1556-276X-7-126