A semi-flexible polymer microtensiometer for local surface pressure measurements of Langmuir monolayers is presented. The current device geometry and read-out method via image analysis result in a theoretical accuracy of ±0.02 mN⋅m^− 1 for a dynamic range between 0 and 75 mN⋅m^− 1. The tensiometer sensitivity and dynamic range are easily tunable as they are solely based on the tensiometer spring dimensions. Finite element simulations are used to determine the response time of 20 ms for a subphase viscosity of 1 mPa⋅s. A poroviscomechanical model of the sensor is composed and the subphase viscosity is shown to dominate the transient behavior. The tensiometer performance is verified in a Langmuir trough by applying rapid local surface pressure oscillations. A Wilhelmy plate is used as an independent measurement tool and the results of both techniques correlate well.

提出了一种半柔性聚合物微张力计，用于测量Langmuir单层的局部表面压力。通过图像分析结果在±0.02的理论精度当前设备的几何形状和读出方法 mN⋅m ^{-  1} 0和75之间的动态范围 mN⋅m ^{-  1}。张力计的灵敏度和动态范围很容易调整，因为它们仅基于张力计的弹簧尺寸。有限元模拟用于确定 亚相粘度为1时20ms的响应时间 mPa·s。组成了传感器的黏流力学模型，并显示了亚相黏度支配了瞬态行为。通过应用快速的局部表面压力振荡，可在Langmuir槽中验证张力计的性能。威廉（Wilhelmy）板用作独立的测量工具，并且两种技术的结果都具有很好的相关性。