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2 article(s) from Sewald, Norbert

Oriented attachment explains cobalt ferrite nanoparticle growth in bioinspired syntheses

Annalena Wolff,
Walid Hetaba,
Marco Wißbrock,
Stefan Löffler,
Nadine Mill,
Katrin Eckstädt,
Axel Dreyer,
Inga Ennen,
Norbert Sewald,
Peter Schattschneider and
Andreas Hütten

Beilstein J. Nanotechnol. 2014, 5, 210–218, doi:10.3762/bjnano.5.23

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Figure 1: Schematic of the oriented attachment process that occurs in the presence of organic additives. (a) ...

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Figure 2: (a)–(c) Change in the electron diffraction pattern (shown with inverted intensity for better visibi...

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Figure 3: Top: Change in the electron diffraction pattern of diamond shaped particles with time. The inverted...

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Figure 4: Change in the average disc diameter with time. The data is fitted with the kinetic model for an ori...

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Figure 5: Schematic of nanoparticle formation during the biomimetic growth process. (a) Crystallites are form...

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Figure 6: Geometry used for the calculation of the inner surface reduction, with z as the particle thickness ...

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Supp Info

Full Research Paper

Published 28 Feb 2014

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Review and outlook: from single nanoparticles to self-assembled monolayers and granular GMR sensors

Alexander Weddemann,
Inga Ennen,
Anna Regtmeier,
Camelia Albon,
Annalena Wolff,
Katrin Eckstädt,
Nadine Mill,
Michael K.-H. Peter,
Jochen Mattay,
Carolin Plattner,
Norbert Sewald and
Andreas Hütten

Beilstein J. Nanotechnol. 2010, 1, 75–93, doi:10.3762/bjnano.1.10

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Figure 1: Schematic representation of the precursor concentration according to the LaMer model. The blue line...

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Figure 2: Interaction of different ligands with the surface of a metallic nanoparticle. There is only a singl...

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Figure 3: Transmission electron microscopy (TEM) images of Co particles of various sizes and morphologies syn...

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Figure 4: (a) Nanoparticles synthesized by micro emulsion approach and (b) by employment of the synthetic pro...

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Figure 5: Hypothesized particle formation during the biomineralization process in magnetotactic bacteria (in ...

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Figure 6: Dynamic evolution of different concentrations for the decay rates k₁ = 0.00753 s⁻¹ and k₂ = 0.0136 s...

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Figure 7: Co particles with a diameter of 4.9 and 10 nm measured at room temperature shortly after the prepar...

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Figure 8: Self-assembled FeCo nanoparticles with different dimensions: (a) The 2D-monolayer of 4.6 nm sized s...

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Figure 9: (a) Scheme of two particles with a metallic core of radius R surrounded by a ligand shell of the th...

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Figure 10: Images of self-assembled spherical Co nanoparticles: (a) TEM image of a bimodal distribution; large...

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Figure 11: TEM images of self-assembled Co particles with different morphologies. Nanodisks exhibit a typical ...

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Figure 12: Schematic representation of the tunnel magnetoresistance (TMR) sensor setup for the detection of mu...

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Figure 13: Properties of the magnetoresistive sensors. (a) Comparison between experimental and numerical data....

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Figure 14: GMR response of a monolayer consisting of 8 nm Co particles covered by a thin Cu film. Measurements...

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Figure 15: Magnetoresistance measurements at room temperature on a granular system consisting of Co nanopartic...

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Figure 16: Magnetization evolution of four interacting magnetic dipoles arranged in the corners of a square wi...

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Figure 17: Equilibrium states of 10 × 10-particle arrays with cubic and hexagonal symmetry. Magnetic moments i...

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Figure 18: Direction dependent responses of different small particle assemblies to an external magnetic field....

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Figure 19: Response maps of a 10 × 10-hexagonal gGMR sensor for a probe particle with R_p = 50 nm and M_p = 500 ...

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Figure 20: Comparison between free (dotted) and hysteretic (line) sensor behavior for cubic and hexagonal symm...

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Review

Published 22 Nov 2010

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