Longo Elson, Avansi Waldir, Bettini Jefferson, Andrés Juan, Gracia Lourdes
Institute of Chemistry, UNESP-Universidade Estadual Paulista, R. Francisco Degni, 55, Araraquara 14800-900, Brazil.
Department of Physics, UFSCar- Universidade Federal de São Carlos, Rod. Washington Luis, km 235, Sao Carlos 13565-905, Brazil.
Sci Rep. 2016 Mar 16;6:21498. doi: 10.1038/srep21498.
The study of the interaction of electron irradiation with matter and the response of the material to the passage of electrons is a very challenging problem. However, the growth mechanism observed during nanostructural evolution appears to be a broad and promising scientific field in nanotechnology. We report the in situ TEM study of nanostructural evolution of electron-driven silver (Ag) nanocrystals through an additive-free synthetic procedure. Observations revealed the direct effect of the electron beam on the morphological evolution of Ag nanocrystals through different mechanisms, such as mass transport, site-selective coalescence, and an appropriate structural configuration after coalescence leading to a more stable configuration. A fundamental understanding of the growth and formation mechanisms of Ag nanocrystals, which interact with the electron beam, is essential to improve the nanocrystal shape-control mechanisms as well as the future design and study of nanomaterials.
研究电子辐照与物质的相互作用以及材料对电子通过的响应是一个极具挑战性的问题。然而，在纳米结构演化过程中观察到的生长机制似乎是纳米技术中一个广泛且有前景的科学领域。我们报告了通过无添加剂合成程序对电子驱动的银（Ag）纳米晶体纳米结构演化的原位透射电子显微镜研究。观察结果揭示了电子束通过不同机制对Ag纳米晶体形态演化的直接影响，如质量传输、位点选择性聚结以及聚结后形成更稳定构型的适当结构构型。深入了解与电子束相互作用的Ag纳米晶体的生长和形成机制，对于改进纳米晶体形状控制机制以及未来纳米材料的设计和研究至关重要。
