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The Effectof Film Microtexture and Magnetic Field on Transparency of Fe3O4-PDMS Nanocomposite Films

By: Li, D.; Peng, B.; Zhang, Q.; Liu, Y.; Yang, Y.;

2014 / IEEE


This item from - IEEE Letter - Engineered Materials, Dielectrics and Plasmas - This letter reports the feasibility of tuning the transmittance of Fe3O4-polydimethylsiloxane nanocomposite films via film microtexture and external magnetic field. Anisotropic and isotropic films with Fe3O4 nanoparticle weight fractions ranging from 1 wt% to 13 wt% were fabricated in the presence and absence of an external magnetic field, respectively, during the film fabrication process. UV-vis transmission spectra of the films indicate that the anisotropic films demonstrate higher transparency than the isotropic counterparts with the same weight fraction of Fe3O4 nanoparticles. Furthermore, it was observed that the transmittance of the films can be tuned by applying an external magnetic field, which might be due to changes in the Fe3O4 interparticle distance induced by magnetostrictive effect. In the case of an anisotropic film with Fe3O4 nanoparticle weight fraction of 10 wt%, the transmittance decreases by 8.61% at the wavelength of 600 nm under a magnetic field of B (=˜ 800) G.