Figure 4.
(A) Schematic representation of one method to form a self-sealing closed sac. A sample of the denser negatively charged biopolymer solution is dropped onto a positively charged peptide amphiphile solution. (B) Open and (C) closed sac formed by injection of a fluorescently tagged hyaluronic acid solution into a PA solution. (D) Self-assembled sacs of varying sizes. (E) PA-HA membranes of different shapes created by interfacing the large- and small-molecule solutions in a very shallow template (~1 mm thick). (F) Continuous strings pulled from the interface between the PA and HA solutions45.