论文部分内容阅读
利用0.97 GeV的209Bi离子辐照二硫化钼(MoS_2)晶体,辐照注量范围为1×1010～1×1012ions/cm~2,结合原子力显微镜(AFM)观测和Raman光谱分析研究了快重离子辐照对MoS_2热导率的影响。实验结果显示,快重离子辐照在MoS_2中产生了潜径迹,较高激光功率下的Raman测试使样品局部温度升高,导致E12g和A1g峰随注量增加向低波数方向移动,且峰形展宽。引入了通过改变激光功率测量Raman光谱得到MoS_2热导率的计算方法,获得了不同辐照注量下MoS_2的热导率的定量分析结果,随注量增加,热导率不断降低,从未辐照样品的563 W/m K下降到1×1012ions/cm~2辐照时的132 W/mK。
The MoS_2 crystal was irradiated by 209Bi ion of 0.97 GeV and the irradiation fluence was in the range of 1 × 1010 ~ 1 × 1012 ions / cm ~ 2. The atomic force microscopy (AFM) and Raman spectroscopy were used to study the effect of fast heavy ion Effect of Irradiation on Thermal Conductivity of. The experimental results showed that the fast heavy ion irradiation produced a latent track in MoS_2. The Raman test at higher laser power increased the local temperature of the sample, resulting in the shift of E12g and A1g peaks toward the lower wave number as the fluence increased. Shape wide exhibition. The calculation method of the thermal conductivity of MoS_2 by Raman spectroscopy is introduced. The quantitative analysis of the thermal conductivity of MoS_2 under different irradiation fluences is obtained. The thermal conductivity decreases with the increase of the fluence, The sample’s 563 W / m K drops to 132 W / mK at 1 × 10 12 ions / cm 2.