Fig. 3
From: Construction of magnetic nanochains to achieve magnetic energy coupling in scaffold
a Magnetic field distribution around a Fe3O4 nanoparticle. The attractive (b) dipole–dipole forces between two adjacent nanoparticles drive the formation of nanochains along the magnetic field (c). d Magnetization curves, (e) XPS spectra of Fe3O4@SiO2 nanochains. (e1) XPS survey spectrum along with the spectra of (e2) Fe2p, (e3) Si2p and (e4) O1s. (f) XRD patterns, (g) FTIR spectra