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    Bending of Layer-by-Layer Films Driven by an External Magnetic Field

    Year: 2013

    Journal: INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES, Vol. 14, p 12953-12969, 20150703

    Authors: Miyazaki, Celina M.; Riul, Antonio, Jr.; Dos Santos, David S., Jr.; Ferreira, Mariselma; Constantino, Carlos J. L.; Pereira-da-Silva, Marcelo A.; Paupitz, Ricardo; Galvao, Douglas S.; Oliveira, Osvaldo N., Jr.

    Organizations: Fed Univ ABC, Ctr Nat & Human Sci, BR-09210170 Santo Andre, SP, Brazil; Univ Estadual Campinas, UNICAMP, Gleb Wataghin Inst Phys, Dept Appl Phys, BR-13083970 Campinas, SP, Brazil; Univ Sao Paulo, Sao Carlos Inst Phys, BR-13560970 Sao Carlos, SP, Brazil; Sao Paulo State Univ, UNESP, Fac Sci & Technol, BR-19060900 Presidente Prudente, SP, Brazil; UNICEP, Paulista Univ Ctr, BR-13563470 Sao Carlos, SP, Brazil; Sao Paulo State Univ, UNESP, Dept Phys, IGCE, BR-13506900 Rio Claro, SP, Brazil

    We report on optimized architectures containing layer-by-layer (LbL) films of natural rubber latex (NRL), carboxymethyl-chitosan (CMC) and magnetite (Fe3O4) nanoparticles (MNPs) deposited on flexible substrates, which could be easily bent by an external magnetic field. The mechanical response depended on the number of deposited layers and was explained semi-quantitatively with a fully atomistic model, where the LbL film was represented as superposing layers of hexagonal graphene-like atomic arrangements deposited on a stiffer substrate. The bending with no direct current or voltage being applied to a supramolecular structure containing biocompatible and antimicrobial materials represents a proof-of-principle experiment that is promising for tissue engineering applications in biomedicine.