One-dimensional Ni/Ni 3 C core-shell nanoball chains with an average diameter by around 30 nm were synthesized by means of a mild chemical solution method using a soft template of trioctylphosphineoxide (TOPO). It was revealed that the uniform Ni nanochains were capped with Ni 3 C thin shells by about 1~4 nm in thickness and each Ni core consists of polygrains. The coercivity of the core-shell nanochains is much enhanced (600 Oe at 5 K) and comparable with single Ni nanowires due 2 to the one-dimensional shape anisotropy. Deriving from the distinctive structure of Ni core and Ni 3 C shell, this architecture may possess a possible bi-functionality. This unique architecture is also useful for the study on the magnetization reversal mechanism of one-dimensional magnetic nanostructure.

High shear vortex fluidics coupled with NIR affords luminescent carbon dots as a scalable process.