Alsulami Awsaf, Alharbi Majed, Alsaffar Fadhel, Alolaiyan Olaiyan, Aljalham Ghadeer, Albawardi Shahad, Alsaggaf Sarah, Alamri Faisal, Tabbakh Thamer A, Amer Moh R
Center of Excellence for Green Nanotechnologies, Joint Centers of Excellence Program, King Abdulaziz City for Science and Technology, Riyadh, 11442, Saudi Arabia.
Department of Mechanical and Aerospace Engineering, University of California, Los Angeles, Los Angeles, CA, 90095, USA.
Small. 2023 Mar;19(11):e2205763. doi: 10.1002/smll.202205763. Epub 2022 Dec 30.
Recent reports on thermal and thermoelectric properties of emerging 2D materials have shown promising results. Among these materials are Zirconium-based chalcogenides such as zirconium disulfide (ZrS ), zirconium diselenide (ZrSe ), zirconium trisulfide (ZrS ), and zirconium triselenide (ZrSe ). Here, the thermal properties of these materials are investigated using confocal Raman spectroscopy. Two different and distinctive Raman signatures of exfoliated ZrX (where X = S or Se) are observed. For 2D-ZrX , Raman modes are in alignment with those reported in literature. However, for quasi 1D-ZrX , Raman modes are identical to exfoliated ZrX nanosheets, indicating a major lattice transformation from 2D to quasi-1D. Raman temperature dependence for ZrX are also measured. Most Raman modes exhibit a linear downshift dependence with increasing temperature. However, for 2D-ZrS , a blueshift for A1g mode is detected with increasing temperature. Finally, phonon dynamics under optical heating for ZrX are measured. Based on these measurements, the calculated thermal conductivity and the interfacial thermal conductance indicate lower interfacial thermal conductance for quasi 1D-ZrX compared to 2D-ZrX , which can be attributed to the phonon confinement in 1D. The results demonstrate exceptional thermal properties for Zirconium-based materials, making them ideal for thermoelectric device applications and future thermal management strategies.
近期有关新兴二维材料热学和热电性质的报告显示出了令人鼓舞的结果。这些材料包括锆基硫族化合物，如二硫化锆（ZrS₂）、二硒化锆（ZrSe₂）、三硫化锆（ZrS₃）和三硒化锆（ZrSe₃）。在此，使用共焦拉曼光谱对这些材料的热学性质进行了研究。观察到了剥离的ZrX（其中X = S或Se）的两种不同且独特的拉曼特征。对于二维ZrX，拉曼模式与文献报道的一致。然而，对于准一维ZrX，拉曼模式与剥离的ZrX纳米片相同，表明从二维到准一维发生了主要的晶格转变。还测量了ZrX的拉曼温度依赖性。大多数拉曼模式随温度升高呈现线性下移依赖性。然而，对于二维ZrS₂，随着温度升高检测到A1g模式发生蓝移。最后，测量了ZrX在光热作用下的声子动力学。基于这些测量，计算得到的热导率和界面热导表明，与二维ZrX相比，准一维ZrX的界面热导更低，这可归因于一维中的声子限制。结果表明锆基材料具有优异的热学性质，使其成为热电设备应用和未来热管理策略的理想选择。
