Rod-shaped assemblies of FePt-PtTe2 through dynamic templating
Date of Original Version
The synthesis of rod-shaped assemblies of FePt-PtTe2 composites through co-precipitation of the two inorganic phases using a simple polyol process in the presence of sucrose and trioctylphosphine oxide (TOPO), has been demonstrated. The formation of plate-shaped PtTe2 crystals offers the framework for the nanorod assembly through heterogeneous nucleation of FePt on the PtTe2 surfaces and inter-plate ligation through sucrose binding. The FePt-PtTe2 nanorod assemblies exhibit high coercivity upon annealing and can be rendered thermally stable and amenable to biofunctionalization by coating a thin silica shell, making the assemblies useful for magnetically-stimulated cell manipulation. Such a synthesis approach can be adapted to encourage new applications in other multi-component/phase systems where shape control can be otherwise difficult.
Yan, Qingyu, Makala S. Raghuveer, Huafang Li, Binay Singh, Taegyun Kim, Mutsuhiro Shima, Arijit Bose, and Ganapathiraman Ramanath. "Rod-shaped assemblies of FePt-PtTe2 through dynamic templating." Advanced Materials 19, 24 (2007): 4358-4363. doi:10.1002/adma.200602130.