Fig. 1 | Nature Communications

Fig. 1

From: Complex assembly from planar and twisted π-conjugated molecules towards alloy helices and core-shell structures

Fig. 1

Molecular design and morphology characterization of BA, BN, and BA/BN helical assemblies. a Schematic showing the molecular structures of BA (green) and BN (pink). b, d, f, and g SEM images of (b) BA tubes, (d) BN tubes, and BA/BN helical ribbons obtained at m/m = 2:1 and v/v = 4:1 at (f) low and (g) high magnification. Scale bars, 10 μm in b, d, g and 30 μm in f. TEM images of single c BA and e BN tubes. Scale bars, 2 μm in c and 200 nm in e. Insets show the selected-area electron diffraction (SAED) patterns of BA and BN tubes, respectively. h SEM and i, j TEM images of single (i) left- and (j) right-handed helical ribbons. Scale bars, 10 μm in h and 30 μm in i, j. k TEM image of single typical helix. Inset shows the corresponding SAED pattern. Scale bar, 2 μm

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