Abstract

The droplet coalescence theory, which implies the refinement and further development of the Frenkel approach, has, for the first time, been used for predicting the characteristic time of coalescence of nanodroplets. The coalescence times obtained for gold nanodroplets agree, in the order of magnitude, with the results of our molecular-dynamics experiments. In addition, the characteristic times of coalescence have been evaluated theoretically for macroscopic droplets of epoxy resin. The results obtained are in good agreement with Geguzin’s experimental data. It has been concluded that the viscous flows arising in coalescing droplets and the corresponding dissipation of the surface free energy underlie the coalescence mechanism of not only macroscopic, but also nanosized droplets. At the same time, the results of our molecular-dynamics calculations and available experimental data indicate that the sintering of crystalline nanoparticles cannot be explained by the Frenkel mechanism of solid body viscous flow.

中文翻译：

---

纳米液滴聚结与固体颗粒烧结的机理研究

摘要

液滴聚结理论首次暗示了纳米液滴聚结的特征时间，这意味着Frenkel方法的改进和进一步发展。金纳米液滴获得的聚结时间在数量级上与我们的分子动力学实验的结果一致。另外，理论上已经对环氧树脂的宏观液滴评估了聚结的特征时间。获得的结果与Geguzin的实验数据非常吻合。已经得出结论，聚结液滴中产生的粘性流动以及表面自由能的相应耗散不仅是宏观液滴的聚结机理，而且也是纳米液滴的聚结机理的基础。同时，