1] Department of Materials Science and Engineering, University of California, Berkeley, California 94720, USA [2] National Center for Electron Microscopy, Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
Department of Mechanical Engineering, University of California, Berkeley, California 94720, USA.
Nat Commun. 2014 Oct 13;5:4986. doi: 10.1038/ncomms5986.
Temperature measurement is critical for many technological applications and scientific experiments, and different types of thermometers have been developed to detect temperature at macroscopic length scales. However, quantitative measurement of the temperature of nanostructures remains a challenge. Here, we show a new type of microthermometer based on a vanadium dioxide nanowire. Its mechanism is derived from the metal-insulator transition of vanadium dioxide at 68 °C. As our results demonstrate, this microthermometer can serve as a thermal flow meter to investigate sample heating from the incident electron beam using a transmission electron microscope. Owing to its small size the vanadium dioxide nanowire-based microthermometer has a large measurement range and high sensitivity, making it a good candidate to explore the temperature environment of small spaces or to monitor the temperature of tiny, nanoscale objects.
温度测量对于许多技术应用和科学实验至关重要，已经开发出了不同类型的温度计来检测宏观长度尺度上的温度。然而，纳米结构的温度的定量测量仍然是一个挑战。在这里，我们展示了一种基于二氧化钒纳米线的新型微温度计。其工作原理源自于 68°C 时的二氧化钒的金属-绝缘体相变。正如我们的结果所表明的，这种微温度计可用作热流量计，利用透射电子显微镜研究入射电子束对样品的加热。由于其尺寸小，基于二氧化钒纳米线的微温度计具有较大的测量范围和较高的灵敏度，使其成为探索小空间温度环境或监测微小纳米尺度物体温度的良好候选者。
