Schnedlitz Martin, Lasserus Maximilian, Knez Daniel, Hauser Andreas W, Hofer Ferdinand, Ernst Wolfgang E
Institute of Experimental Physics, Graz University of Technology, Petersgasse 16, A-8010 Graz, Austria.
Institute for Electron Microscopy and Nanoanalysis & Graz Centre for Electron Microscopy, Graz University of Technology, Steyrergasse 17, A-8010 Graz, Austria.
Phys Chem Chem Phys. 2017 Apr 5;19(14):9402-9408. doi: 10.1039/c7cp00463j.
We present time-resolved transmission electron microscopy studies of the degradation of Au, Ag, Cu and Ni nanowires deposited on a heated support. The wires are grown under fully inert conditions in superfluid helium droplets and deposited onto amorphous carbon. The inherent stability of these pristine metal nanowires with diameters below 10 nm is investigated in the absence of any stabilizers, templates or solvents. The phenomenon of Rayleigh-breakup, a consequence of diffusion processes along the wire surfaces, is analysed in situ via scans over time and support temperature. Our experimental efforts are combined with simulations based on a novel model featuring a cellular automaton to emulate surface diffusion. Based on this model, correlations between the material parameters and actual breakup behaviour are studied.
我们展示了对沉积在加热载体上的金、银、铜和镍纳米线降解的时间分辨透射电子显微镜研究。这些纳米线在超流氦液滴中完全惰性条件下生长，并沉积在非晶碳上。在没有任何稳定剂、模板或溶剂的情况下，研究了这些直径低于10纳米的原始金属纳米线的固有稳定性。通过随时间和载体温度的扫描，原位分析了沿导线表面扩散过程导致的瑞利破裂现象。我们的实验工作与基于一种具有细胞自动机以模拟表面扩散的新模型的模拟相结合。基于该模型，研究了材料参数与实际破裂行为之间的相关性。
