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Journal ArticleDOI

Template assisted self-assembly of iron oxide nanoparticles: An x-ray structural analysis

06 Feb 2014-Journal of Applied Physics (American Institute of Physics)-Vol. 115, Iss: 5, pp 054104
TL;DR: In this paper, the authors have fabricated by e-beam lithography periodic arrays of rectangular shaped trenches of different widths into Si substrates and filled them with iron oxide nanoparticles by spin-coating them onto the Si substrate.
Abstract: We have fabricated by e-beam lithography periodic arrays of rectangular shaped trenches of different widths into Si substrates. The trenches were filled with iron oxide nanoparticles, 20 nm in diameter, by spin-coating them onto the Si substrate. The trenches have the purpose to assist the self-assembly of the iron oxide nanoparticles. Using x-ray scattering techniques, we have analyzed the structure factor of the trenches before and after filling in order to determine the filling factor. We present a theoretical analysis of the x-ray scattering function within the distorted-wave Born approximation and we present a quantitative comparison between theory and experiment.
Citations
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Journal ArticleDOI
TL;DR: The applications of exchange coupled bi-magnetic hard/soft and soft/hard ferromagnetic core/shell nanoparticles are reviewed in this paper, where the main synthesis approaches and the structural-morphological characterization are presented.
Abstract: The applications of exchange coupled bi-magnetic hard/soft and soft/hard ferromagnetic core/shell nanoparticles are reviewed. After a brief description of the main synthesis approaches and the core/shell structural-morphological characterization, the basic static and dynamic magnetic properties are presented. Five different types of perspective applications, based on diverse patents and research articles, are described: permanent magnets, recording media, microwave absorption, biomedical applications and other applications. Both the advantages of the core/shell morphology and some of the remaining challenges are discussed.

349 citations

Journal ArticleDOI
TL;DR: The applications of exchange coupled bi-magnetic hard/soft and soft/hard ferromagnetic core/shell nanoparticles are reviewed in this article, with a brief description of the main synthesis approaches and the structural-morphological characterization.

306 citations

Journal ArticleDOI
TL;DR: In this article, Daphne mezereum extract was used as reducing and stabilizing agent for the synthesis of iron oxide nanoparticles (IONPs) for dye removal.
Abstract: Green synthetic method is an important process that can be used for the synthesis of iron nanoparticles in the field of nanotechnology because of its characteristics of low cost and high efficiency for industrial large-scale production. In this study, iron oxide nanoparticles (IONPs) were synthesized by a simple bio-reduction method. Aqueous leaf extract of Daphne mezereum was used as a reducing and stabilizing agent. Ultraviolet–visible (UV–vis) absorption spectroscopy was used to monitor the dye removing ability of IONPs. Also, IONPs were characterized by transmission electron microscopy (TEM), particle size analysis (PSA), Fourier transform infrared (FT-IR) spectroscopy, X-ray diffractometer (XRD), vibrating sample magnetometer (VSM), and thermo gravimetric analysis (TGA). The average diameter of the prepared NPs ranged from 6.5 to 14.9 nm with a mean particle size of 9.2 nm. In addition, the synthesized iron nanoparticles were tested for dye removing activities. The decoloration efficiency of INPs catalyzed reaction was about 81% after 6 h. Thus, it could be concluded that D. mezereum aqueous leaf extract can be used efficiently in the production of iron oxide NPs for commercial applications in environmental fields.

185 citations

References
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Journal ArticleDOI
TL;DR: It is shown how various well-known asymptotic power laws in S(q) are obtained from the above theory, and the theory is compared with experimental results on x-ray scattering from a polished Pyrex glass surface.
Abstract: The scattering of x rays and neutrons from rough surfaces is calculated. It is split into specular reflection and diffuse scattering terms. These are calculated in the first Born approximation, and explicit expressions are given for surfaces whose roughness can be described as self-affine over finite length scales. Expressions are also given for scattering from liquid surfaces, where it is shown that ``specular'' reflections only exist by virtue of a finite length cutoff to the mean-square height fluctuations. Expressions are also given for the scattering from randomly oriented surfaces, as studied in a typical small-angle scattering experiment. It is shown how various well-known asymptotic power laws in S(q) are obtained from the above theory. The distorted-wave Born approximation is next used to treat the case where the scattering is large (e.g., near the critical angle for total external reflection), and its limits of validity are discussed. Finally, the theory is compared with experimental results on x-ray scattering from a polished Pyrex glass surface.

2,031 citations

Journal ArticleDOI
22 Jun 2010-ACS Nano
TL;DR: The present review critically investigates to what extent self-assembly can be directed, enhanced, or controlled by either changing the energy or entropy landscapes, using templates or applying external fields.
Abstract: Within the field of nanotechnology, nanoparticles are one of the most prominent and promising candidates for technological applications. Self-assembly of nanoparticles has been identified as an important process where the building blocks spontaneously organize into ordered structures by thermodynamic and other constraints. However, in order to successfully exploit nanoparticle self-assembly in technological applications and to ensure efficient scale-up, a high level of direction and control is required. The present review critically investigates to what extent self-assembly can be directed, enhanced, or controlled by either changing the energy or entropy landscapes, using templates or applying external fields.

1,938 citations

Journal ArticleDOI
TL;DR: The self-asembly of block copolymers is a promising platform for the "bottom-up" fabrication of nanostructured materials and devices.
Abstract: The self-asembly of block copolymers is a promising platform for the "bottom-up" fabrication of nanostructured materials and devices. This review covers some of the advances made in this field from the laboratory setting to applications where block copolymers are in use.

666 citations

Journal ArticleDOI
TL;DR: The large-scale preparation of FeCo nanoparticles boosts the potential of magnetic nanoparticles for data storage and medicinal imaging applications.
Abstract: Magnetic nanoparticles are useful for a wide range of applications from data storage to medicinal imaging The large-scale preparation of FeCo nanoparticles boosts this potential

474 citations

BookDOI
01 Jan 2004
TL;DR: The first € price and the £ and $ price are net prices, subject to local VAT as discussed by the authors, and the first £ and £ price is net price subject to the local VAT.
Abstract: The first € price and the £ and $ price are net prices, subject to local VAT. Prices indicated with * include VAT for books; the €(D) includes 7% for Germany, the €(A) includes 10% for Austria. Prices indicated with ** include VAT for electronic products; 19% for Germany, 20% for Austria. All prices exclusive of carriage charges. Prices and other details are subject to change without notice. All errors and omissions excepted. U. Pietsch, V. Holy, T. Baumbach High-Resolution X-Ray Scattering

391 citations