Jiang Xiaobao, Sheng Hongchao, Xiao Beibei
Department of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, China.
School of Energy and Power Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, China.
Phys Chem Chem Phys. 2023 Nov 1;25(42):29310-29314. doi: 10.1039/d3cp04236g.
Understanding the physical origin of materials exhibiting different properties at the mesoscale is of great significance for the design and fabrication of multifunctional quantum devices. In this work, we proposed a simple model without any adjustable parameters to describe the size () dependence of Debye temperature () of metallic nanocrystals. () drops with the decrease of , which is verified by relevant experimental and simulation results. In addition, we found that the difference in the size dependence of () of different metal elements is determined by the ratio of the solid/liquid interface energy and surface stress , and the smaller the of the nanocrystals, the greater the influence of / on ().
理解材料在介观尺度上表现出不同性质的物理起源对于多功能量子器件的设计和制造具有重要意义。在这项工作中，我们提出了一个没有任何可调参数的简单模型来描述金属纳米晶体的德拜温度（）随尺寸（）的变化关系。（）随着的减小而下降，这一点得到了相关实验和模拟结果的验证。此外，我们发现不同金属元素的（）随尺寸变化关系的差异由固/液界面能和表面应力的比值决定，并且纳米晶体的越小，/对（）的影响就越大。
