Table 1: Characteristics of Cu2O crystals produced by free dealloying.

Corrosion mediaDealloying timeMorphologyEdge lengthArea percentage (%)

HF4 minCube~90 nm26.5
HCl6 hCuboctahedron~300 nm12.2
8 hTruncated octahedron~150 nm13.9
14 hOctahedron~1.2 μm15.8
20 hHexapods~500 nm14.4
24 hDendrite~1.4 μm (dendrite length)14.3Total 19.8
Octahedron-detached hexapods~1.1 μm5.5