title: Silver nanoparticles assemblies mediated by functionalized biomimetic oligomers.
abstract: The interaction between biopolymers and metal nanoparticles (AgNPs) is a key element in the development of biomimetic nanomaterials with applications in catalysis, delivery, and recognition. Here we report a facile method for the functionalization of AgNPs by N-substituted glycine oligomers, "peptoids." Based on the established affinity between phenanthroline ligand and Ag(0), we synthesized a peptoid bearing 1,10-phenanthroline at the N-terminus (PHP). Treatment of AgNPs that were pre-stabilized by citrate ions, with PHP, leads to the formation of aggregates as suggested by UV-vis spectroscopy. Transmission electron microscopy (TEM) revealed that the replacement of citrate ions by PHP yields spherical assemblies of AgNPs. These peptoids/AgNPs hybrids, as well as the ability of functional biomimetic oligomers to mediate the assembly of metal nanoparticles, hold potential for applications in sensor materials, biology, and catalysis.
authors.affiliation: Department of Chemistry and Molecular Design Institute, New York University, 100 Washington Square East, New York, NY 10003-6688, USA. gm92@ufl.edu
authors.forename: Galia
authors.initials: G
authors.lastname: Maayan
authors.forename: Li-Kai
authors.initials: LK
authors.lastname: Liu
mesh_terms: D032701:Biomimetics; D006863:Hydrogen-Ion Concentration; D053768:Metal Nanoparticles / Q000737:chemistry*; D015394:Molecular Structure; D034444:Peptoids / Q000138:chemical synthesis / Q000737:chemistry*; D012834:Silver / Q000737:chemistry*
chemical_list: D034444:Peptoids; D012834:Silver