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Bio-Inspired Metal-Coordination Crosslinking: Easy Access to Broad Dynamics When Engineering Polymer Gel Mechanics: Nano Seminar Series

Seminar | September 7 | 2-3 p.m. | 390 Hearst Memorial Mining Building

Prof. Niels Holten-Andersen, MIT, Materials Science & Engineering

Berkeley Nanosciences and Nanoengineering Institute

Efforts to engineer polymer material mechanics are increasingly coupled to the design of transient crosslink dynamics. We have sought to gain a deeper understanding of how polymer gel mechanical properties can be controlled over multiple hierarchical time-scales via design of bioinspired metal-coordinate crosslink structure on multiple length-scales.

By utilizing metal ion coordination complexes and metal nanoparticle-coordination junctions as supra-molecular crosslink structures, we have gained unique access to network dynamics on the microscopic scale, and thereby opportunities to broadly shape the distribution of network stress relaxation on the macroscopic scale.

Our findings offer deeper insights on how to engineer gel stress relaxation mechanics directly via design of supramolecular crosslink structure dynamics, and could help improve our understanding of spatio-temporal molecular hierarchy in loadbearing biological materials.

Niels Holten-Andersen did his PhD in BioE at UC Santa Barbara and postdoc at Chicago. He joined MIT in 2012. Awards include the ONR Young Investigator and the 3M Non-Tenured Faculty.