Fig. 4: Growth and characterization of 2D perovskite nanowires with different compositions. | Nature Communications

Fig. 4: Growth and characterization of 2D perovskite nanowires with different compositions.

From: Two-dimensional organic-inorganic hybrid perovskite quantum-well nanowires enabled by directional noncovalent intermolecular interactions

Fig. 4

a Scheme for the growth of NWs with large aspect ratio by introducing nucleation. b, c Comparison of (PMA)2PbI4 NWs grown with (c) and without (b) scratching the substrate. Scale bar in B is 10 μm. Scale bar in C is 30 μm. Inset is scanning electron microscope (SEM) image of a (PMA)2PbI4 NW with flat surface. Scale bar is 5 μm. d Atomic force microscope image of a (PMA)2PbI4 NW. Inset is the height profile extracted along the dashed line. Scale bar is 2 μm. e Statistics of the width and length distributions of (PMA)2PbI4 grown under conditions with and without introducing nucleation. The slope (k) indicates the aspect ratio. f Statistics of the width and thickness distributions of 12 selected (PMA)2PbI4 NWs. g Optical images of 2D perovskite NWs with various spacer cations, metal cations, halide anions, cage cations, and n values. All scale bars are 10 μm. CH2O2PEA+ = 3,4-methylenedioxyphenethylammonium. h SEM image of a (DFPD)2PbI4 NW with a high aspect ratio. Scale bar is 10 μm.

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