Jollans Thomas, Orrit Michel
Huygens-Kamerlingh Onnes Laboratory, Leiden University, Postbus 9504, 2300 RA Leiden, The Netherlands.
Phys Rev E. 2019 Jun;99(6-1):063110. doi: 10.1103/PhysRevE.99.063110.
We investigate the different boiling regimes around a single continuously laser-heated 80 nm gold nanoparticle and draw parallels to the classical picture of boiling. Initially, nanoscale boiling takes the form of transient, inertia-driven, unsustainable boiling events characteristic of a nanoscale boiling crisis. At higher heating power, nanoscale boiling is continuous, with a vapor film being sustained during heating for at least up to 20μs. Only at high heating powers does a substantial stable vapor nanobubble form. At intermediate heating powers, unstable boiling sometimes takes the form of remarkably stable nanobubble oscillations with frequencies between 40 MHz and 60 MHz, frequencies that are consistent with the relevant size scales according to the Rayleigh-Plesset model of bubble oscillation, though how applicable that model is to plasmonic vapor nanobubbles is not clear.
我们研究了单个连续激光加热的80纳米金纳米颗粒周围不同的沸腾状态，并将其与经典的沸腾图像进行对比。最初，纳米尺度的沸腾表现为瞬态、惯性驱动、不可持续的沸腾事件，这是纳米尺度沸腾危机的特征。在较高的加热功率下，纳米尺度的沸腾是连续的，在加热过程中至少可持续20微秒形成蒸汽膜。只有在高加热功率下才会形成大量稳定的蒸汽纳米气泡。在中等加热功率下，不稳定的沸腾有时会表现为频率在40兆赫至60兆赫之间的显著稳定的纳米气泡振荡，根据气泡振荡的瑞利-普莱斯模型，这些频率与相关尺寸尺度一致，不过该模型对等离子体蒸汽纳米气泡的适用性尚不清楚。
