Figure 1: Crystal structure of BP and device structure for the thermal transport experiment. | Nature Communications

Figure 1: Crystal structure of BP and device structure for the thermal transport experiment.

From: Anisotropic in-plane thermal conductivity of black phosphorus nanoribbons at temperatures higher than 100 K

Figure 1: Crystal structure of BP and device structure for the thermal transport experiment.

(a) Illustration of the crystal structure of BP showing the ZZ and AC axes. ZZ and AC axes correspond to the [100] and [001] direction of the orthorhombic unit cell, respectively (Supplementary Fig. 1a). (b) Scanning electron microscopic image of a micro-device consisting of two suspended pads and a bridging BP nanoribbon. Thermal conductivity is measured by transporting heat from the Joule-heated pad to the other pad through the nanoribbon. (c) High-resolution transmission electron microscopy lattice image of a BP flake. (d) Selected area electron diffraction pattern taken from the area shown in c. (e) Micro-Raman spectra of a BP flake with laser polarized in parallel to the ZZ and AC axis, respectively. Scale bars, 50 μm (b); 10 nm (c); 20 nm−1 (d).

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