Thermal conductivity anisotropy in molybdenum disulfide thin films

molybdenum disulfide;thermal conductivity;thin film;anisotropy

McLaren, Ryan C. ; King, William P. ; King ; William P.

关键词: molybdenum disulfide;    thermal conductivity;    thin film;    anisotropy;   

Others  :  https://www.ideals.illinois.edu/bitstream/handle/2142/14668/McLaren_Ryan.pdf?sequence=2&isAllowed=y

美国|英语

来源: The Illinois Digital Environment for Access to Learning and Scholarship

【 摘 要 】

This study was completed to determine the anisotropy in molybdenum disulfide, MoS2,thin films. The hexagonal crystal structure of MoS2 and recent results on tungsten diselenide,with a similar structure, lead to the belief that MoS2 may exhibit ultralow thermal conductivity.Thermal conductivities were measured using the time-domain thermoreflectance method. MoS2samples were prepared with different crystallographic orientations relative to the substrate by magnetron sputtering and ion-beam-assisted deposition. The thermal conductivity of MoS2 was measured as low as 0.2 W/m-K, very low for a fully dense solid and 3 times lower than in theamorphous phase. Although thermal conductivity was not strongly dependent on the orientationof the crystal structure, deposition parameters can be used to control thermal conductivity.