Figure 2

Typical SEM images of (a) the hybrid arrays supported on Ni foam, the inset and (b) are the high magnification images of the red box area in (a). (c) Typical TEM image of the hybrid structures, the inset is the SAED pattern of the whole area. (d) A HRTEM image of the hybrid structures. (Urea plus thiourea, Ni:Mn: 0.7:0.35, 90 oC for 4 h + 110 oC for 10 h).