Anisotropic Thermal Conductivity of Exfoliated Black Phosphorus
Hyejin Jang, Joshua D. Wood, Christopher R. Ryder, Mark C. Hersam, and, David G. Cahill
TL;DR
This study measures the directional thermal conductivity of exfoliated black phosphorus, revealing significant anisotropy with higher conductivity along the zigzag axis compared to the armchair axis, using time-domain thermoreflectance.
Contribution
It provides the first detailed measurement of anisotropic thermal conductivity in exfoliated black phosphorus along different crystalline axes.
Findings
Thermal conductivity along zigzag axis: 86 +/- 8 W/(m*K)
Thermal conductivity along armchair axis: 34 +/- 4 W/(m*K)
Conductivity is approximately 2.5 times higher in zigzag direction.
Abstract
We ascertain the anisotropic thermal conductivity of alumina passivated black phosphorus (BP), a reactive 2D nanomaterial with strong in-plane anisotropy. We measure the room temperature thermal conductivity by time-domain thermoreflectance for the three crystalline axes of exfoliated BP. The thermal conductivity along the zigzag direction (86 +/- 8 W/(m*K)) is ~2.5 times higher than that of the armchair direction (34 +/- 4 W/(m*K)).
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