Figure 3
(a) Definition of the characteristic lengths for the w-structured NWires growing along the [0001] axis with a hexagonal cross section and six interfaces, which are shown by translucent black lines. The six isoceles triangles located at the six corners of the cross section present the offset area and offsets of interface lengths which are all constant for all cross sections of this type, applying to even and odd series alike. (b)–(e) Top and side views of the first four members, even series: (b) X12 (i = 1), (c) X48 (i = 2), (d) X108 (i = 3) and (e) X192 (i = 4). The colours of the internal atoms are orange for Ga and grey–blue for N. Red atoms have one interface bond. |