[RSC Advances] Controlled evaporative self-assembly of Fe3O4 nanoparticles assisted by external magnetic field
writer：Yonghong Men, Wenqin Wang, Peng Xiao, Jincui Gu, Aihua Sun, Youju Huang, Jiawei Zhang and Tao Chen*
keywords：controlled evaporative self-assembly, magnetic field, Fe3O4 nanoparticles, Polymer brushes
source：期刊
specific source：RSC Advances, 2015, 5, 31519-3152
Issue time：2015年
High
fidelity and regularity structures of nanoscale materials opened up new
opportunities for developing miniaturized devices. A simple yet robust approach
of magnetic field assisted controlled evaporative self-assembly (CESA) is
developed to achieve Fe3O4 nanoparticles (NPs) micro- and
nano-patterns in two dimensional (2D) direction. In magnetic field assisted
CESA process, the self-assembly morphology can be well controlled by varying
extrinsic and intrinsic variables such as temperature, external magnetic field,
and concentration of Fe3O4 NPs. Under the optimized
magnetic field rotation frequency and temperature, 2D self-assembly of Fe3O4 NPs can be well realized. In addition, as photoactive sites, double bonds on
the surface of Fe3O4 NPs allow the growth of polymer
brushes by self-initiated photografting and photopolymerization (SIPGP), and
the further achievement of free-standing magnetic composite film with well-defined
patterns.