Transferring Micellar Changes to Bulk Properties via Tunable Self-Assembly and Hierarchical Ordering
Lisa Thomson, Daniel McDowall, Libby J. Marshall, Olivia Marshall, Henry C.-H. Ng, W. Joseph A. Homer, Dipankar Ghosh, Wanli Liu, Adam M. Squires, Eirini Theodosiou, Paul D. Topham, Louise C. Serpell, Robert J. Poole, Annela M. Seddon, Dave J. Adams
Abstract
Hierarchical self-assembly is an effective means of preparing useful materials. However, control over assembly across length scales is a difficult challenge, often confounded by the perceived need to redesign the molecular building blocks when new material properties are needed. Here, we show that we can treat a simple dipeptide building block as a polyelectrolyte and use polymer physics approaches to explain the self-assembly over a wide concentration range. This allows us to determine how entangled the system is and therefore how it might be best processed, enabling us to prepare interesting analogues to threads and webs, as well as films that lose order on heating and "noodles" which change dimensions on heating, showing that we can transfer micellar-level changes to bulk properties all from a single building block.