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Perpendicular Magnetization in Self-Assembled Films of Citrate-Capped -Fe2O3 Nanocrystals on Si(100) Surfaces

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-Fe2O3 nanocrystals capped with citrate and octylamine have been chemically prepared. The octylamine-capped nanocrystals exhibit a tendency to form ordered lattices. Films of nanocrystals of varying thickness (454, 720, and 1400 g/cm2 in the case ofcitrate-capped nanocrystals and 300 g/cm2 in the case of octylamine-capped nanocrystals) have been prepared on Si(100) substrates by drop casting and have been characterized by X-ray diffraction, scanning electron microscopy, and atomic force microscopy. Magnetic measurementshave been carried out on the films as well as on nanocrystal powders. The films of citrate-capped -Fe2O3 nanocrystals exhibit enhanced perpendicular magnetization, with the anisotropy depending on the film thickness.
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Keywords: IRON OXIDE NANOPARTICLES; MAGNETIC NANOCRYSTALS; MESOSCALAR ASSEMBLY; PERPENDICULAR MAGNETIZATION; SELF-ASSEMBLY

Document Type: Research Article

Publication date: 2005-04-01

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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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