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. 2021 Mar 4;12:1440. doi: 10.1038/s41467-021-21564-y

Fig. 2. Characterization of BPs using POM, fiber optic spectrometer, DSC, impedance analysis, SAXS, and electro-optical testing.

Fig. 2

a POM textures of Sample 6 at different temperatures. b Temperature-dependent Bragg reflection of Sample 6. c DSC curves of Samples 3 and 6, phase transition points are marked via black arrows; corresponding temperatures are marked via red dashed lines. d Temperature dependence of relative dielectric constant (εr–T) of Sample 6, corresponding phase transition points from DSC measurement are marked via red dashed lines. e Large BP single crystals obtained via thermal treatment. f POM textures of Sample 8 for SAXS measurement. g Intensity of scattered X-rays in arbitrary units as a function of the magnitude of the scattering vector q (an average value of three measures), corresponding scattered peaks of spacings d1–d4 are marked via red arrows. h Voltage-dependent transmittance (V-T). i Electro-optical response curves of the BP samples.