Sungjin Kim1, Abigail U Regitsky1, Jake Song1, Jan Ilavsky2, Gareth H McKinley3, Niels Holten-Andersen4. 1. Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA. 2. X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Lemont, IL, USA. 3. Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA. 4. Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA. holten@mit.edu.
Abstract
Biological organic-inorganic materials remain a popular source of inspiration for bioinspired materials design and engineering. Inspired by the self-assembling metal-reinforced mussel holdfast threads, we tested if metal-coordinate polymer networks can be utilized as simple composite scaffolds for direct in situ crosslink mineralization. Starting with aqueous solutions of polymers end-functionalized with metal-coordinating ligands of catechol or histidine, here we show that inter-molecular metal-ion coordination complexes can serve as mineral nucleation sites, whereby significant mechanical reinforcement is achieved upon nanoscale particle growth directly at the metal-coordinate network crosslink sites.
Biological organic-inorganic materials remain a popular source of inspiration for bioinspired materials design and engineering. Inspired by the self-assembling metal-reinforced mussel holdfast threads, we tested if pan class="Chemical">metal-coordinate polymer networks can be utilized as simple composite scaffolds for direct in situ crosslink mineralization. Starting with aqueous solutions of polymers end-functionalized with metal-coordinating ligands of catechol or histidine, here we show that inter-molecular metal-ion coordination complexes can serve as mineral nucleation sites, whereby significant mechanical reinforcement is achieved upon nanoscale particle growth directly at the metal-coordinate network crosslink sites.
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