Understanding the Impact of Wall Thickness on Thermal Stability of Silver–Gold Nanocages
Understanding the Impact of Wall Thickness on Thermal Stability of Silver–Gold Nanocages
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DOI：
10.1021/acs.jpcc.2c01433
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发表时间：
2022-04
期刊：
影响因子：
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通讯作者：
Shikuan Shao;Xiangyu Zhu;V. Ten;Moon J. Kim;Xiaohu Xia
中科院分区：
文献类型：
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作者：
Shikuan Shao;Xiangyu Zhu;V. Ten;Moon J. Kim;Xiaohu Xia
纳米笼的热稳定性在基础研究和实际应用中都具有重要的研究价值。在我们的研究工作中，通过以银−金(Ag−Au)合金化的纳米笼为模型系统，我们证明了纳米笼的壁厚是决定其热稳定性的关键参数。我们系统地评价了不同壁厚的Ag−Au纳米笼在3.8−13 nm范围内在溶液和固相中的热稳定性。结果表明，在这两个阶段，壁厚的纳米笼表现出更好的稳定性。在足够高的温度下，纳米笼变形为热力学上更稳定的纳米结构。具有不同壁厚的纳米笼的变形过程是不同的，并通过电子显微镜成像进行了仔细的监测和分析。还研究了纳米笼在热致变形过程中等离子体性质的变化。
The thermal stability of nanocages is of great research value in both fundamental studies and practical applications. In our research work, by focusing on silver−gold (Ag−Au) alloyed nanocages as a model system, we demonstrate that the wall thickness of the nanocage is a critical parameter in determining its thermal stability. We systematically evaluated the thermal stabilities of Ag−Au nanocages with different wall thicknesses in the range 3.8−13 nm in both solution and solid phases. The results showed that, in both phases, nanocages with thicker walls displayed better stabilities. At sufficiently high temperatures, the nanocages were deformed to thermodynamically more stable nanostructures. The deformation processes were found to be different for nanocages with various wall thicknesses, which were carefully monitored and analyzed by electron microscopy imaging. Changes in plasmonic properties of the nanocages during heat-induced deformation processes were also investigated.