Maali Abdelhamid, Cohen-Bouhacina Touria, Couturier Gérard, Aimé Jean-Pierre
CPMOH, Université Bordeaux1, 351 Cours de la Libération, 33405 Talence, France.
Phys Rev Lett. 2006 Mar 3;96(8):086105. doi: 10.1103/PhysRevLett.96.086105.
We present a sensitive measurement of the dissipation and the effective viscosity of a simple confined liquid (octamethylcyclotetrasiloxane) using an atomic force microscope. The experimental data show that the damping and the effective viscosity increase and present oscillations as the gap between the cantilever tip and the surface is diminished. To our knowledge, the damping and the viscosity modulation are reported here with such good accuracy for the first time. Such an experimental result is different from what has been reported earlier where only a continuous increase of the damping and the viscosity are observed.
我们使用原子力显微镜对一种简单的受限液体（八甲基环四硅氧烷）的耗散和有效粘度进行了灵敏测量。实验数据表明，随着悬臂尖端与表面之间的间隙减小，阻尼和有效粘度会增加并呈现振荡。据我们所知，这里首次如此精确地报道了阻尼和粘度调制情况。这样的实验结果与之前报道的不同，之前仅观察到阻尼和粘度持续增加。
