Environment-Sensitive Thermal Coarsening of Nanoporous Gold
Environment-Sensitive Thermal Coarsening of Nanoporous Gold
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DOI：
10.2320/matertrans.mf201403
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发表时间：
2015-01-01
影响因子：
1.2
通讯作者：
Chen, Mingwei
中科院分区：
文献类型：
--
作者：
Kuwano-Nakatani, Satoko;Fujita, Takeshi;Chen, Mingwei
为了研究环境对纳米多孔金（NPG）韧带/孔粗化的影响，采用非原位观察方法研究了NPG在空气和真空中的热粗化过程，发现NPG在真空中具有较高的结构稳定性。为了澄清这种现象的性质，我们研究了热粗化的NPG原位环境透射电子显微镜。在升高的温度（400 ℃）下，通过将纯N-2或O-2气体引入透射电子显微镜（TEM）室（但不是通过Ar气体）来触发韧带/孔的粗化。最后，我们讨论了NPG的热粗化机制。
In order to investigate environmental effects on the ligament/pore coarsening of nanoporous gold (NPG), we studied the thermal coarsening of NPG both in air and vacuum by ex situ observation, and found that it has high structural stability against heat treatment in vacuum. To clarify the nature of this phenomenon, we investigated the thermal coarsening of NPG by in situ environmental transmission electron microscopy. At an elevated temperature (400 degrees C), the coarsening of ligaments/pores was triggered by introducing either pure N-2 or O-2 gas into the transmission electron microscopy (TEM) chamber (but not by Ar gas). We thus conclude with a discussion on the mechanism for thermal coarsening of NPG.