Quantitative Nanoscale Mapping of Three-Phase Thermal Conductivities in Filled Skutterudites via Scanning Thermal Microscopy | |
Ehsan Nasr Esfahani; Feiyue Ma; Shanyu Wang; Yun Ou; Jihui Yang; Jiangyu Li | |
刊名 | National Science Review |
2017 | |
文献子类 | 期刊论文 |
英文摘要 | In the last two decades, a nanostructuring paradigm has been successfully applied in a wide range of thermoelectric materials, resulting in significant reduction in thermal conductivity and superior thermoelectric performance. These advances, however, have been accomplished without directly investigating the local thermoelectric properties, even though local electric current can be mapped with high spatial resolution. In fact, there still lacks an effective method that links the macroscopic thermoelectric performance to the local microstructures and properties. Here, we show that local thermal conductivity can be mapped quantitatively with good accuracy, nanometer resolution, and one-to-one correspondence to the microstructure using a three-phase skutterudite as a model system. Scanning thermal microscopy combined with finite element simulations demonstrate close correlation between sample conductivity and probe resistance, enabling us to distinguish thermal conductivities spanning orders of magnitude, yet resolving thermal variation across a phase interface with small contrast. The technique thus provides a powerful tool to correlate local thermal conductivities, microstructures, and macroscopic properties for nanostructured materials in general, and nanostructured thermoelectrics in particular. |
URL标识 | 查看原文 |
语种 | 英语 |
WOS记录号 | WOS:000426048100027 |
内容类型 | 期刊论文 |
源URL | [http://ir.siat.ac.cn:8080/handle/172644/12125] |
专题 | 深圳先进技术研究院_医工所 |
作者单位 | National Science Review |
推荐引用方式 GB/T 7714 | Ehsan Nasr Esfahani,Feiyue Ma,Shanyu Wang,et al. Quantitative Nanoscale Mapping of Three-Phase Thermal Conductivities in Filled Skutterudites via Scanning Thermal Microscopy[J]. National Science Review,2017. |
APA | Ehsan Nasr Esfahani,Feiyue Ma,Shanyu Wang,Yun Ou,Jihui Yang,&Jiangyu Li.(2017).Quantitative Nanoscale Mapping of Three-Phase Thermal Conductivities in Filled Skutterudites via Scanning Thermal Microscopy.National Science Review. |
MLA | Ehsan Nasr Esfahani,et al."Quantitative Nanoscale Mapping of Three-Phase Thermal Conductivities in Filled Skutterudites via Scanning Thermal Microscopy".National Science Review (2017). |
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