Figure 2.

Schematic representation of the microtensiometer adapted from ref (33). A solution well (A) contains the polypeptoid solution. Pressure transducer (B) is used to measure the back pressure, P₁, inside the capillary I and hydrostatic pressure of the constant pressure head (C), and P₂ is determined based on the volume and density of the fluid above the tip of the capillary (F). A peristaltic pump (D) is used to exchange the contents of the solution well to process the interfaces.