Electro and magneto dual response of TiO2@Fe3O4 core–shell composite nanoparticle

In this study, electro and magneto dual response of TiO 2 @Fe 3 O 4 composite nanoparticles is realized by situ-generating Fe 3 O 4 , which was synthesized by FeCl 3 and FeSO 4 , on rose-like TiO 2 pore in virtue of facile hydrothermal reaction. Morphology, structure and physical properties, such as dielectric constant and magnetic conductivity, of the TiO 2 @Fe 3 O 4 composite particles were characterized. The particles were dispersed in hydrous elastomer to measure their electro and magneto responsive property by the scanning electron microscopy of micro structure of hydrous elastomer and dynamic mechanical analysis that reflected by the sensitivity of the increase in storage modulus ( f  = ∆ G / G ) of the hydrous elastomer cured in the absence/presence of external field. The one of the TiO 2 @Fe 3 O 4 particles consisting of the ratio of TiO 2 :Fe 3 O 4 to 2:1 has the highest electro and magneto dual responsive effect that reaches 62%, which is far higher than TiO 2 with only 15%. This work provides a new substance shows the excellent performance of electro and magneto dual response to applied in smart material field.