Figure 1From: A Two-Step Hydrothermal Synthesis Approach to Monodispersed Colloidal Carbon SpheresSEM images of colloidal carbon spheres produced by the one-step approach by heating at 180 °C for 4 h under various concentrations:a 1.5 M,b 1.0 M,c 0.6 M,d 0.4 M,e 0.2 M, andf 0.1 MBack to article page