Hennemeyer Marc, Burghardt Stefan, Stark Robert W
Ludwig-Maximilians-Universität München, Center for NanoScience (CeNS) and Dept. Earth and Environmental Sciences, Theresienstrasse 41, 80333 Munich, Germany.
Sensors (Basel). 2008 Jan 9;8(1):10-22. doi: 10.3390/s8010010.
The volume required for the rheological characterization of fluids can beminimized by using micromechanical cantilevers as viscosity sensors. Here, a simplemeasurement tool for the characterization of sugar solutions is proposed. The sensorconsists of a micromechanical cantilever as used in an atomic force microscopy which isintegrated into a closed fluid handling system. Fluid properties are derived from an analysisof the power spectral density of the fluctuations of the cantilever deflection signal. The dataacquisition system is operated with standard consumer computer components, which limitsthe costs for the hardware. Measurements with different sugar solutions indicate that thesensor system provides reliable viscosity values for sugar concentrations as they occur inbiological systems. The viscosities of the sugar solutions could be evaluated with an errorsmaller than 5 %.
通过使用微机械悬臂作为粘度传感器，可以将流体流变学表征所需的体积降至最低。在此，提出了一种用于表征糖溶液的简单测量工具。该传感器由一个用于原子力显微镜的微机械悬臂组成，该悬臂集成在一个封闭的流体处理系统中。流体特性是通过对悬臂偏转信号波动的功率谱密度进行分析得出的。数据采集系统使用标准的消费级计算机组件运行，这限制了硬件成本。用不同糖溶液进行的测量表明，该传感器系统能够为生物系统中出现的糖浓度提供可靠的粘度值。糖溶液的粘度评估误差小于5%。
