TEM images. (a) Typical Au nanoparticles as building units and (b to d) typical interfacial polygonal patterning via surfactant-mediated self-assembly of Au nanoparticles with different magnifications. Experimental conditions: AuNPs (Au/DDT = 0.1); AuNPs (2STU) + DDT (0.11 M; 22 mL) + PVP (1.25 mM; 0.5 mL), 180°C, 4 h. See Additional file 1: SI-1 for more information on their detailed experimental conditions.
Zhang et al. Nanoscale Research Letters 2013 8:436 doi:10.1186/1556-276X-8-436