Figure 1.

a Schematic diagram of as-obtained carbon-coated SnO2 nanorod array and b XRD of the as-obtained product on alloy substrate; c SEM image of array. Inset is the cross-sectional SEM image of array; the black arrow indicates the present of carbon layer

Ji et al. Nanoscale Research Letters 2010 5:649-653   doi:10.1007/s11671-010-9529-x