title: Illustrating the processability of magnetic layered double hydroxides: layer-by-layer assembly of magnetic ultrathin films.
abstract: We report the preparation of single-layer layered double hydroxide (LDH) two-dimensional (2D) nanosheets by exfoliation of highly crystalline NiAl-NO3 LDH. Next, these unilamellar moieties have been incorporated layer-by-layer (LbL) into a poly(sodium 4-styrenesulfonate)/LDH nanosheet multilayer ultrathin film (UTF). Fourier transform infrared spectroscopy (FT-IR), ultraviolet-visible light (UV-vis), and X-ray diffraction (XRD) profiles have been used to follow the uniform growth of the UTF. The use of a magnetic LDH as the cationic component of the multilayered architecture enables study of the resulting magnetic properties of the UTFs. Our magnetic data show the appearance of spontaneous magnetization at ∼5 K, thus confirming the effective transfer of the magnetic properties of the bulk LDH to the self-assembled film that displays glassy-like ferromagnetic behavior. The high number of bilayers accessible-more than 80-opens the door for the preparation of more-complex hybrid multifunctional materials that combine magnetism with the physical properties provided by other exfoliable layered inorganic hosts.
authors.affiliation: Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, Catedrático José Beltrán 2, 46890 Paterna, Spain.
authors.forename: E
authors.initials: E
authors.lastname: Coronado
authors.forename: C
authors.initials: C
authors.lastname: Martí-Gastaldo
authors.forename: E
authors.initials: E
authors.lastname: Navarro-Moratalla
authors.forename: A
authors.initials: A
authors.lastname: Ribera
authors.forename: S
authors.initials: S
authors.lastname: Tatay
mesh_terms: D006878:Hydroxides / Q000138:chemical synthesis / Q000737:chemistry*; D060526:Magnetic Fields; D049329:Nanostructures / Q000737:chemistry*; D010316:Particle Size; D011108:Polymers / Q000737:chemistry*; D013451:Sulfonic Acids / Q000737:chemistry*; D013499:Surface Properties; D014961:X-Ray Diffraction
chemical_list: D006878:Hydroxides; D011108:Polymers; D013451:Sulfonic Acids; C077114:styrenesulfonic acid polymer