This paper illustrates a novel route for the synthesis of nanostructured transition metal arsenides including those of FeAs, CoAs, MnAs, and CrAs through a generalized protocol. The key feature of the method is the use of one-step hot-injection and the clever use of a combination of precursors which are low-melting and highly reactive such as metal carbonyls and triphenylarsine in a solventless setup. This method also facilitates the formation of one-dimensional nanostructures as we move across the periodic table from CrAs to CoAs. The chemical basis of this reaction is simple redox chemistry between the transition metals, wherein the transition metal is oxidized from elemental state (E0) to E3+ in lieu of reduction of As3+ to As3-. While the thermodynamic analysis reveals that all these conversions are spontaneous, it is the kinetics of the process that influences morphology of the product nanostructures, which varies from extremely small nanoparticles to nanorods. Transition metal pnictides show interesting magnetic properties and these nanostructures can serve as model systems for the exploration of their intricate magnetism as well as their applications and can also function as starting materials for the arsenide based nanosuperconductors.



Keywords and Phrases

Arsenic compounds; Carbonylation; Corrosion resistant alloys; Manganese; Metals; Nanorods; Synthesis (chemical); Thermoanalysis; Transition metals; Metal carbonyl; Morphology evolution; Nano-structured; One-dimensional nanostructure; Redox chemistry; Thermo dynamic analysis; Transition metal Pnictides; Triphenylarsine; Nanostructures

International Standard Serial Number (ISSN)


Document Type

Article - Journal

Document Version

Final Version

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Publication Date

01 Sep 2015

Included in

Chemistry Commons