Direct observation of zipper-like wall-to-wall coalescence of double-wall carbon nanotubes
Direct observation of zipper-like wall-to-wall coalescence of double-wall carbon nanotubes
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DOI：
10.1016/j.carbon.2014.01.024
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发表时间：
2014-05
期刊：
影响因子：
10.9
通讯作者：
Sihan Zhao;Y. Miyata;H. Shinohara;R. Kitaura
中科院分区：
文献类型：
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作者：
Sihan Zhao;Y. Miyata;H. Shinohara;R. Kitaura
电子显微镜原位观察已经成为一种非常强大的表征手段，可以唯一地在纳米尺度上提供物理和化学转变的动力学和动力学的实时信息。在这里，我们报告了一种配备微米级碳纳米管(CNT)网络加热器的高温兼容样品加热架的研制。碳纳米管网络加热器可将样品加热至极高温度，最高可达>；2000℃，同时将加热引起的样品空间漂移降至最低。这直接导致了两个平行排列的双壁碳纳米管(DWCNTs)之间的纯热驱动纳米焊接过程的实时成像，反应后形成了单个较大直径的DWCNT，并确定了反应速度。这项技术基本适用于各种热驱动的固相动力学变化/反应的原位透射电子显微镜研究，并将为纳米科学和纳米热力学提供更有意义的见解。
In situ transmission electron microscope (TEM) observation has become a fairly powerful characterization method to uniquely provide the real-time information on the dynamics and kinetics of physical and chemical transformations at the nanometer scale. Here, we report a development of a high-temperature-compatible specimen heating holder equipped with a micro-sized carbon nanotube (CNT) network heater. The CNT network heater can heat samples up to extremely high temperature, as high as >2000 °C, while minimizing the spatial drift of the samples induced by the heating. This has directly led to a real-time imaging of a purely thermally-driven nano-welding process between two parallel-aligned double-wall carbon nanotubes (DWCNTs) using low-voltage TEM (80 keV); a single larger-diameter DWCNT was formed after the reaction and the reaction rate was determined. This technique developed is basically applicable to the in situ TEM study of various thermal-driven solid-phase dynamical changes/reactions and should provide more significant insight on nanoscience and nanothermodynamics.