Magnetophoretic induced convective capture of highly diffusive superparamagnetic nanoparticles

• DOI: 10.1039/c7sm02324c
• Publication Date: 2018-03-13T09:34:20Z
• Authors: M. Fratzl; S. Delshadi; T. Devillers; F. Bruckert; O. Cugat; N. M. Dempsey; G. Blaire
• Keywords: [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]; 02 engineering and technology; 0210 nano-technology

Micro-magnets producing magnetic field gradients as high as 106 T m−1 have been used to efficiently trap nanoparticles with a magnetic core of just 12 nm in diameter. The presented effect is based on the often-neglected particle–fluid two-way coupling leading to magnetophoretic convection.