【Others Papers】Growth and ultralow thermal conductivity of beta-Ga₂O₃ nanowires

      Researchers from the Henan University have published a dissertation titled "Growth and ultralow thermal conductivity of beta-Ga₂O₃ nanowires" in Materials Letters.

Abstract

      β-Ga₂O₃ nanowires were prepared on C-plane sapphire substrates with coated Au serving as a catalyst via chemical vapor deposition. The morphologies, structural properties and elemental composition of the products were characterized by scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, transmission electron microscopy and Raman spectroscopy. The results show that the products are single crystalline β-Ga₂O₃ nanowires with the diameter ranging from 40 to 100 nm and the length ranging from 10 to 50 μm, respectively. In addition, the optical and thermal properties of the β-Ga₂O₃ nanowires have been studied by photoluminescence spectrometer and laser thermal conductivity instrument. These β-Ga₂O₃ nanowires have exhibited a broad blue-green emission with a peak at 487 nm and an ultralow thermal conductivity (0.026 W/m K) in the room-temperature, which is potential application in the future.

DOI：

https://doi.org/10.1016/j.matlet.2025.138425