Fig. 1: Characterization of 1D vdW FRP crystal.
From: Giant anisotropic photonics in the 1D van der Waals semiconductor fibrous red phosphorus
a–c Schematic structural view of 1D vdW FRP crystal along the a (a), b (b) and c (c) directions. DFT-calculated lattice parameters along the a, b, and c directions are 12.37 Å, 13.11 Å, and 7.14 Å, respectively. The angles α (between b and c), β (between a and c), and γ (between a and b) are ~117.07°, 106.13°, and 97.81°, respectively. d The experimentally measured XRD diffractogram (upper panel) and simulated patterns (lower panel). e The low-magnification TEM image of 1D vdW FRP crystal (upper panel) and the corresponding EDS mapping of the phosphorus element (lower panel). f HRTEM image from the [214] zone axis, showing exclusively strands lying parallel to each other. The inset is the corresponding FFT pattern. g Enlarged HRTEM image taken from the area marked by the white outline in f.
