Abstract: Methods for fast fresh surface formation between two fluids as well as a device employing this method to measure dynamic or equilibrium interfacial tension between the fluids.

Abstract: The invention proposes new methods for fast fresh surface formation of a drop or bubble of a test fluid and a device to realize the new methods to determine the dynamic or equilibrium surface/interfacial tension (ST/IFT) of this liquid. The methods are implemented by means of a single device which is used both for dynamic and equilibrium measurements of the ST/IFT. Depending on the method, the determination of the ST/IFT can be performed either by Axisymmetric Drop Shape Analysis (ADSA) or Capillary Pressure Method (CPM) or both. In addition, with this device the Drop Volume Method and Stopped Jet Method can be realized, which has been modified and improved with the proposed invention in comparison with the known methods. The combination of several methods for creating a fresh surface and of two techniques for determining ST/IFT in a single device allows choosing the most suitable method for a given fluid system considering the system properties and desired time range.

Abstract: Method and apparatus for forming a two-dimensional assembly of fine particles on a surface. A wall cell is placed in contact with or near the surface of a solid substrate so as to form a closed surface region on the surface of the solid substrate, a liquid containing fine particles is injected onto the closed surface region in the wall cell, and then the liquid is removed at a controlled rate, thereby causing a two-dimensional assembly of fine particles to form on the solid surface.