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Bending of layer-by-layer films driven by an external magnetic field

Grant number: 13/06992-5
Support type:Regular Research Grants - Publications - Scientific article
Duration: June 01, 2013 - November 30, 2013
Field of knowledge:Interdisciplinary Subjects
Principal Investigator:Antonio Riul Júnior
Grantee:Antonio Riul Júnior
Home Institution: Instituto de Física Gleb Wataghin (IFGW). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil

Abstract

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 (AU)