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. Author manuscript; available in PMC: 2015 Oct 18.
Published in final edited form as: Curr Opin Pharmacol. 2014 Oct 18;0:141–148. doi: 10.1016/j.coph.2014.10.001

Fig. 4.

Fig. 4

a) MTT viability test curves demonstrating the cellular viability after subjecting the MCF-7 cells to increasing concentrations of halloysite nanotubes. Insert: laser scanning confocal microscopy image of FITC-polyelectrolyte coated halloysite nanotubes (green) located near cellular nuclei (blue) of cultured MCF-7 cells. Reproduced with permission from [47]; b) growth curves of native yeast cells, yeast mixed with halloysite nanotubes, yeast coated with PAH/PSS/PAH/PSS and yeast coated with PAH/HNTs/PAH/PSS. Insert: SEM image of yeast cells coated with halloysite-doped polymer shells. Reprinted with permission from [45]. Copyright (2013) The Royal Society of Chemistry.