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Near infrared laser stimulation of human neural stem cells into neurons on graphene nanomesh semiconductors
, Article Colloids and Surfaces B: Biointerfaces ; Volume 126 , 2015 , Pages 313-321 ; 09277765 (ISSN) ; Ghaderi, E ; Shirazian, S. A ; Sharif University of Technology
Abstract
Reduced graphene oxide nanomeshes (rGONMs), as p-type semiconductors with band-gap energy of ~1. eV, were developed and applied in near infrared (NIR) laser stimulation of human neural stem cells (hNSCs) into neurons. The biocompatibility of the rGONMs in growth of hNSCs was found similar to that of the graphene oxide (GO) sheets. Proliferation of the hNSCs on the GONMs was assigned to the excess oxygen functional groups formed on edge defects of the GONMs, resulting in superhydrophilicity of the surface. Under NIR laser stimulation, the graphene layers (especially the rGONMs) exhibited significant cell differentiations, including more elongations of the cells and higher differentiation of...