Fig. 1From: Suppression of Breast Cancer Cell Migration by Small Interfering RNA Delivered by Polyethylenimine-Functionalized Graphene OxideTransmission electron microscopy images of pristine GO and PEI-GO. The surface morphology of pristine GO (a, b) was compared with that of PEI-GO (c, d) by a JEOL 2000FX TEM at different scalesBack to article page