Fig. 3: Elaborate control of organic barcoded heterostructure.

a–c FM and d–i SEM images of organic barcoded microwires prepared with epitaxial growth times of (a, d, and g) 10 min, (b, e, and h) 15 min, and (c, f, and i) 20 min. The scale bars of (a–f) and (h, i) are 20 and 5 μm, respectively. j Plot of the diameter of core and shell parts versus the epitaxial growth time.