Fig. 4: Morphology evolution of epitaxial-growth for forming organic core-shell heterostructure. | Nature Communications

Fig. 4: Morphology evolution of epitaxial-growth for forming organic core-shell heterostructure.

From: Visualizing the interfacial-layer-based epitaxial growth process toward organic core-shell architectures

Fig. 4

a Schematic illustrations of the morphology evolution from barcoded to core-shell heterostructures via increasing the molar ratios between BTB and BTP cocrystals. b–e FM images of organic barcoded microwires excited with the UV band based on the different molar ratios between BTB and BTP: b 8:3, c 8:4, d 8:5 and e 8:6, scale bars are all 50 μm. f, g FM and h SEM images of organic core-shell microwires with an obvious heterojunction between the two shell layers at the center part. The scale bars of (f, g) and (h) are 50 and 20 μm, respectively. i FM and j SEM images of the typical heterojunction between the two shell layers at the center part with a scale bar of 2 μm. k–n FM images of organic core-shell microwires based on different molar ratios between BTB and BTP: k, l 8:8 and (m, n) 8:9. (f, k, and m) and (g, i, l, and n) were excited with the UV and green bands, respectively.

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