Local temperature measurements on nanoscale materials using a movable nanothermocouple assembled in a transmission electron microscope
Local temperature measurements on nanoscale materials using a movable nanothermocouple assembled in a transmission electron microscope
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DOI：
10.1088/0957-4484/22/48/485707
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发表时间：
2011-12
期刊：
影响因子：
3.5
通讯作者：
N. Kawamoto;Ming‐Sheng Wang;Xianlong Wei;Daiming Tang;Y. Murakami;D. Shindo;M. Mitome;D. Golberg
中科院分区：
文献类型：
--
作者：
N. Kawamoto;Ming‐Sheng Wang;Xianlong Wei;Daiming Tang;Y. Murakami;D. Shindo;M. Mitome;D. Golberg
一种由合并的铜和铜 - 镍尖端组成的纳米级热电偶被开发出来，用于在配备双探针扫描隧道显微镜（STM）单元的高分辨率透射电子显微镜（TEM）中通过探测技术对先进纳米材料进行局部温度测量。所制造的纳米热电偶起到所谓的T型热电偶的作用，并显示出快速响应以及高空间分辨率和热分辨率。在金属纳米电极上由电子束强度变化所控制的快速温度变化所产生的热电动势证明了该技术对于高精度局部温度测量的实用性。所开发的方法在测量焦耳加热的多壁碳纳米管（CNT）以及模拟的导电复合纳米系统中的温度变化时也证明了其有效性。
A nanoscale thermocouple consisting of merged Cu and Cu–Ni tips is developed for local temperature measurements on advanced nanomaterials by using a probing technique in a high-resolution transmission electron microscope (TEM) equipped with a double probe scanning tunneling microcopy (STM) unit. The fabricated nanothermocouple works as the so-called T-type thermocouple and displays a quick response and high spatial and thermal resolutions. A generated thermoelectromotive force which reflects rapid temperature changes controlled by electron beam intensity alternations on a metal nanoelectrode proves the technique’s usefulness for high-precision local temperature measurements. The developed method demonstrates the effectiveness while also measuring temperature changes in Joule heated multi-walled carbon nanotubes (CNTs) and in a modeled electrical conductive composite nanosystem.