Ternary Cobalt–Iron Phosphide Nanocrystals with Controlled Compositions, Properties, and Morphologies from Nanorods and Nanorice to Split Nanostructures

Abstract

Structural phase-controlled formation of binary Co(2)P and CoP nanocrystals is achieved by reacting cobalt(II) oleate with trioctylphosphine. In the absence of oleylamine, Co(2)P nanowires are formed at both 290 and 320 °C. In the presence of oleylamine, Co(2)P nanorods are formed at 290 °C, and CoP nanorods are formed at 320 °C. With the simultaneous reaction of iron(III) oleate and cobalt(II) oleate with trioctylphosphine in the presence of oleylamine, ternary Co(2)P-type cobalt-iron phosphide nanostructures are produced at both 290 and 320 °C, corresponding to rice-shaped Co(1.5)Fe(0.5)P nanorods and split Co(1.7)Fe(0.3)P nanostructures, respectively. The controlled incorporation of iron into cobalt phosphide can alter the magnetic properties from paramagnetic binary Co(2)P to ferromagnetic Co(2)P-type ternary cobalt-iron phosphide nanostructures. Meanwhile, the time-dependent morphological evolution from small nanodots/nanorods, through seeded growth to unique split nanostructures is demonstrated in one-pot reaction at 320 °C.

Mechanochemical Synthesis and Characterization of CuInS2/ZnS Nanocrystals

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Designing Nanoparticles and Nanoalloys with Controlled Surface and Reactivity

“…Nowadays, the bulk of the research still deals with optimizing nanoparticles morphology, crystal structure and composition, with an effort on including light elements in metals (eg. phosphorus,, carbon,, boron,). In this purpose, synthetic routes have been diversified: reaction triggers include microwave and sonochemistry and reaction media expanded from aqueous and organic solutions to ionic liquids and molten salts …”

Core-Shell Structures of Upconversion Nanocrystals Coated with Silica for Near Infrared Light Enabled Optical Imaging of Cancer Cells

“…Synthesis of monodispersed, single crystal, high quality nanocrystals (NC) with pure crystal phase and well-defined shapes is of utmost importance for successful biomedical applications such as bioimaging, drug delivery, photodynamic therapy, biosensing, etc. [ 19 , 31 , 32 , 33 , 34 , 35 , 36 ]. Most of the commonly used UCNC synthesis procedures, such as thermal decomposition [ 37 ], high temperature co-precipitation [ 38 , 39 ], solvo/hydrothermal [ 40 ], co-precipitation [ 41 ], sol-gel methods [ 42 ], combustion synthesis [ 43 ], microemulsion [ 44 ], electrospinning [ 45 ], flaming synthesis [ 46 ], and microwave synthesis [ 47 ], produce hydrophobic surfaced nanostructures.…”