Time resolved lateral dynamic force microscopy for exploring nanoscopic water bridge

Lateral dynamic force microscopy based on time-resolved scheme is employed for a good understanding of dynamics of nanoscopic water bridge connecting a sharp tip with a flat sample. In its formation and stepped compression at which the tip and the sample in a true non-contact, the nanoscopic water bridge under oscillatory shear stress shows a transient response behavior for a long time ($ \ge 10^{2} $ ms). This observation obviously demonstrates that an inadequate fast measurement in dynamic force microscopy can lead a misunderstanding of dynamic physical properties of the nanoscopic water.