Synthesis and Self-Assembly of Ultrathin Ni x Fe1−x (OH)2 Nanodiscs via a Wet-Chemistry Method

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Abstract:

Self-assembled ultrathin Ni x Fe1−x (OH)2 nanodiscs have been synthesized by using a wet-chemistry method. The uniformity and the assembly of Ni x Fe1−x (OH)2 nanostructures are sensitive to the iron ion concentration in the precursor. An optimum iron concentration of 10% results in the formation of uniform ultrathin Ni x Fe1−x (OH)2 nanodiscs with a typical side length of 50 nm and a thickness of 10 nm. They are also self-assembled by connecting their (001) facets with in-plane orientation and form a chain-like microstructure. Lattice relaxation is present within several atomic layers at the interfaces between two adjacent nanodiscs, which introduces about 6 misalignment of these nanocrystals. Analytical electron microscopy analysis reveals that the iron additive atoms distribute uniformly in the nanodiscs and they are substitution atoms of Ni atoms. It has been found that the iron species is critical to the formation and assembly of the hexagonal nanodiscs.

Keywords: ELECTRON MICROSCOPY; NANOCRYSTAL; NI X FE1-X (OH)2; SELF-ASSEMBLY

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2011.4013

Publication date: December 1, 2011

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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