Strong orientational coupling in two-component suspensions of rod-like nanoparticles

作者：Kredentser Sergey; Buluy Oleksandr; Davidson Patrick; Dozov Ivan; Malynych Sergiy; Reshetnyak Victor; Slyusarenko Kostyantyn; Reznikov Yuriy^*

来源：Soft Matter, 2013, 9(20): 5061-5066.

DOI：10.1039/c3sm27881f

We consider two-component suspensions of non-magnetic and magnetic rods and show that alignment of the magnetic component by a magnetic field orients the non-magnetic one. We studied suspensions of non-magnetic V2O5 rods doped with magnetic Fe3O4 nanoparticles. In the isotropic phase, the field-induced orientation of Fe3O4 particle chains aligns the V2O5 rods. Moreover, the nematic phase reorients towards the field at approximate to 50 Oe, much less than the approximate to 5 kOe needed for pure V2O5 suspensions. Such effects should exist in any suspension of two kinds of rods, one of which is sensitive to an external field.

• 出版日期2013