论文标题
半球气泡的热毛细管波动的近场探针
Near-field probe of thermal capillary fluctuations of a hemispherical bubble
论文作者
论文摘要
我们报告了使用沉积在固体基板上的半气泡获得的半球液体气体界面的共振热毛细管振荡的测量。使用原子力显微镜悬臂研究半球界面的热运动，该原子力显微镜悬臂探测该界面振动的振幅与频率的振动。气泡表面的这种纳米级热振荡的光谱呈现了几个共振峰，并揭示了半球气泡的接触线固定在基板上。这些峰的分析允许测量气泡界面的表面粘度。少量杂质负责改变纯净水面的流变学。
We report measurements of resonant thermal capillary oscillations of a hemispherical liquid gas interface obtained using a half bubble deposited on a solid substrate. The thermal motion of the hemispherical interface is investigated using an atomic force microscope cantilever that probes the amplitude of vibrations of this interface versus frequency. The spectrum of such nanoscale thermal oscillations of the bubble surface presents several resonance peaks and reveals that the contact line of the hemispherical bubble is pinned on the substrate. The analysis of these peaks allows to measure the surface viscosity of the bubble interface. Minute amounts of impurities are responsible for altering the rheology of the pure water surface.
