Abstract
In this study, for the first time, high-yield chain-like one-dimensional (1D) Co nanostructures without any impurity have been produced by means of a solution dispersion approach under permanent-magnet. Size, morphology, component, and structure of the as-made samples have been confirmed by several techniques, and nanochains (NCs) with diameter of approximately 60 nm consisting of single-crystalline Co and amorphous Co-capped layer (about 3 nm) have been materialized. The as-synthesized Co samples do not include any other adulterants. The high-quality NC growth mechanism is proposed to be driven by magnetostatic interaction because NC can be reorganized under a weak magnetic field. Room-temperature-enhanced coercivity of NCs was observed, which is considered to have potential applications in spin filtering, high density magnetic recording, and nanosensors. PACS: 61.46.Df; 75.50; 81.07.Vb; 81.07.
Highlights
Diverse technological applications of magnetic nanostructures in magnetofluid, recording tape, flexible disk recording media, permanent magnets, microwave oscillators as well as biomedical materials, and catalysts have provided an impetus for extensive research in nanometer scale magnets [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17]
In this article, based on our earlier study [17], we report for the first time a wet chemical synthesis of high-pure Co nanochains (NCs) without any oxide shells and templates
A high-resolution scanning electron microscopy (SEM) image is demonstrated in the inset of Figure 1a where a nanoparticle array, taken from a single NC, is clearly seen
Summary
Diverse technological applications of magnetic nanostructures in magnetofluid, recording tape, flexible disk recording media, permanent magnets, microwave oscillators as well as biomedical materials, and catalysts have provided an impetus for extensive research in nanometer scale magnets [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17]. In this article, based on our earlier study [17], we report for the first time a wet chemical synthesis of high-pure Co nanochains (NCs) without any oxide shells and templates.
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