title: Surface-enhanced Raman scattering on molecular self-assembly in nanoparticle-hydrogel composite.
abstract: Surface-enhanced Raman scattering has been applied to study weak intermolecular interactions between small organic gelling molecules involved in the silver nanoparticle-hydrogel composite formation. Assembly and disassembly of the gelator molecules in close vicinity to embedded silver nanoparticles were followed by changes in Raman intensity of the amide II and carboxyl vibrational bands, whereas the strength of the bands related to benzene modes remained constant. This implied that the gelator molecules were strongly attached to the silver particles through the benzene units, while participating in gel structure organization by intermolecular hydrogen bonding between oxalyl amide and carboxyl groups.
authors.affiliation: Laboratory of Analytical Chemistry, Faculty of Science, University of Zagreb, Horvatovac 102a, 10000 Zagreb, Croatia. miljanic@rudjer.irb.hr
authors.forename: Snezana
authors.initials: S
authors.lastname: Miljanić
authors.forename: Leo
authors.initials: L
authors.lastname: Frkanec
authors.forename: Tomislav
authors.initials: T
authors.lastname: Biljan
authors.forename: Zlatko
authors.initials: Z
authors.lastname: Meić
authors.forename: Mladen
authors.initials: M
authors.lastname: Zinić
mesh_terms: D000577:Amides / Q000737:chemistry; D020136:Hydrogel, Polyethylene Glycol Dimethacrylate / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission; D015394:Molecular Structure; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D010649:Phenylalanine / Q000737:chemistry; D013059:Spectrum Analysis, Raman; D013499:Surface Properties; D013696:Temperature
chemical_list: D000577:Amides; D020136:Hydrogel, Polyethylene Glycol Dimethacrylate; D010649:Phenylalanine