(274h) Imprinting of Metal Receptors into Layer-By-Layer Polyelectrolyte Films for Antifouling Applications

Authors: 
Puniredd, S. R., Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 3 Research Link
Janczewski, D., Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 3 Research Link
Go, D. P., Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 3 Research Link
Zhu, X., Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 3 Research Link
Guo, S., Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 3 Research Link
Serena, T. L. M., Tropical Marine Science Institute, National University of Singapore,
Serina, L. S. C., Tropical Marine Science Institute, National University of Singapore,
Sing, L. C., Tropical Marine Science Institute, National University of Singapore,
Vancso, G. J., MESA+ Institute for Nanotechnology, Materials Science and Technology of Polymers, University of Twente, P.O. Box 217

Imprinting of Cu2+ selective layer-by-layer (LbL) films have been investigated and their antifouling performance has been evaluated. Adsorption of polycation having histidne grafted poly (allylamine) (PAH) and methyl ester containing polyanions yields polymer films with histidine ligands that bind metal ions. Ester groups within the polyanion are favorable for covalent cross linking with the histidine grafted polycation. Two methods of LbL film formation have been demonstrated alternate deposition poly anion with high density methyl esters and poly cation with histidine ligand (non-imprinted LbLA), PAH-Histidine is coordinated with Cu2+ ions in solution and then assembled into multilayer films with poly anion containing high density of methyl esters (imprinted LbLB). In the end, both the LbL films are cross linked at mild temperature to yield the covalent bridging of the layers. Comparative study of the non- imprinted LbLA films and imprinted LbLB films for the Cu2+ ions binding capacity, leaching rate and stability of the films have been investigated and demonstrated that the imprinted films are better than the non-imprintedfilms; thereby the processing method of LbL assembly template is vital for imprinting of metals.