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. 2020 Jan 13;5(3):1566–1571. doi: 10.1021/acsomega.9b03519

Figure 1.

Figure 1

Morphology and compositions of nanostructures grown on the substrate. (a) Side-view SEM micrograph of MgAl2O4 substrate after heating at 1100 °C for 60 min with Mn added. (b) HAADF-STEM micrograph of type A nanopillars and type B nanowires. (c) MgAl2O4 truncated pyramid after heating at 1100 °C for 60 min without Mn. (d–f) EDS mappings of Al, Mg, Mn, O, Si, and Au in nanopillar (d), nanowire body (i), and nanowire bottom (f) with corresponding HAADF micrographs. (g) Quantified atom ratios of elements in ∼20 nanowires and nanopillars. Scale bars: 500 nm in panels (a,c), 250 nm in panel (b), and 30 nm in panels (d–f).