Physics of Complex Fluids and MESA + Institute for Nanotechnology, Department of Science and Technology, University of Twente, Enschede, The Netherlands.
J Phys Condens Matter. 2011 Mar 23;23(11):112206. doi: 10.1088/0953-8984/23/11/112206. Epub 2011 Mar 3.
We present atomic force microscopy (AFM) measurements of the conservative oscillatory solvation forces and the damping in confined films of octamethylcyclotetrasiloxane using small amplitude modulation with magnetic driving. We find distinct maxima in the interaction damping upon probing the discrete molecular layers, supporting earlier observations of the same phenomenon using AFM with an acoustic driving scheme. The maxima in the damping are located at the same tip-surface separation as the maxima in the conservative oscillatory interaction stiffness.
我们利用小振幅调制和磁驱动展示了八甲基环四硅氧烷（[OMCTS]）受限膜中保守振动溶剂化力和阻尼的原子力显微镜（AFM）测量。在探测离散分子层时，我们发现了相互作用阻尼的明显最大值，这支持了使用具有声驱动方案的 AFM 进行的相同现象的早期观察。阻尼中的最大值位于与保守振动相互作用硬度的最大值相同的尖端-表面分离处。
