RESEARCH EQUIPMENT GRANT: Light Scattering from Fluid Interfaces with Controlled Tension

小行星9622479 各种基于激光的光学技术可用于探测油-水界面的基本性质（例如波动），以及可能存在于那里的单分子膜的相行为和结构。 依赖于油和水的混合物的技术依赖于对这些特性和用于稳定界面的材料的深入理解。 主要研究人员最近设计了一种薄膜天平，用于操纵油和水之间界面处的不溶性单层（如磷脂），从而控制流体-流体界面的张力。 该薄膜天平将构成激光实验站的中心，该实验站利用不同的光学技术，以受控张力探测界面的静态和动态。 激光源已经获得，一种技术-布鲁斯特角显微镜-已经上线。 一个相关器和必要的光学元件，以建立一个表面动态光散射（SDLS）设备将获得他的赠款。 SDLS提供了界面波动的信息，可用于确定界面张力以及膜流变参数。 该设备将用于研究脂质和脂质/蛋白质膜的相行为和流变学。 ***

9622479 Vanderlick A variety of laser-based optical techniques can be used to probe the fundamental properties of the oil-water interface (such as fluctuations), as well as the phase behavior and structure of mono-molecular films which may be residing there. Technologies which depend on mixtures of oils and water rely on a deep understanding of these properties and the materials used to stabilize the interface. The principal investigator recently designed a film balance to manipulate insoluble monolayers (such as phospholipids) residing at the interface between oil and water, thereby controlling the tension of the fluid-fluid interface. This film balance will form the hub of a laser-based experimental station which implements and takes advantage of different optical techniques to probe the statics and dynamics of interfaces with controlled tension. The laser source has already been acquired, and one technique-Brewster Angle Microscopy-is already on-line. A correlater and the necessary optical components to set-up a surface dynamic light scattering (SDLS) apparatus will be acquired with his grant. SDLS provides information on the fluctuations of interfaces, which can be used to determine interfacial tension as well as film rheological parameters. The equipment will be used to study the phase behavior and rheology of lipid and lipid/protein films. ***