Surface Forces Apparatus 3 (SFA 3)

表面力仪（SFA）是一种直接测量表面之间的静态和动态力的研究仪器，用于在分子水平上研究界面和薄膜现象。本提案中要求的3号地面部队设备（SFA 3）是SFA系列中极其稳定和通用的设备。对于基础和应用研究都很有用，SFA 3是一种非常灵敏的仪器，它可以测量蒸汽或液体中两个表面之间的力，灵敏度为10 nN，距离分辨率为1 μ m。它还可以用来测量表面力引起的表面变形，动态相互作用，如粘弹性和摩擦力，以及其他与时间有关的现象在真实的时间等。

Surface Forces Apparatus (SFA) is a research instrument for directly measuring the static and dynamic forces between surfaces, and for studying interfacial and thin film phenomena at the molecular level. The Surface Forces Apparatus 3 (SFA 3) requested in this proposal is the extremely stable and versatile apparatus among the SFA family. Useful for both basic and applied studies, the SFA 3 is an extremely sensitive instrument, and it measures the forces between two surfaces in vapors or liquids with a sensitivity of 10 nN and a distance resolution of 1Å measured in situ. It can also be used to measure surface deformations arising from surface forces, dynamic interactions such as viscoelastic and frictional forces, and other time-dependent phenomena in real time, etc.