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Nanoparticles
Items for "Nanoparticles"
Air-stable Co-, Fe-, and Fe/Co-Nanoparticles and Ferrofluids
Air-stable Co, Fe, and Fe/Co nanoparticles are accessible by thermolysis of the metal carbonyl precursors in the presence of aluminium alkyls and subsequent “smooth oxidation”...
Keywords: Nanoparticles, Magnetic Fluids, Positioning Systems, Magnetohydrostatic Bearings
01/2006 | Zeitschrift für Physikalische Chemie, Oldenbourg WissenschaftsverlagPrecipitated Iron Oxide Particles by Cyclic Growth
Magnetic fluids show heating effects in ac-magnetic fields which may be useful for application in magnetic hyperthermia proposed as a tumour therapy...
Keywords: Iron Oxide, Nanoparticles, Precipitation, Magnetic Losses, Heating
01/2006 | Zeitschrift für Physikalische Chemie, Oldenbourg WissenschaftsverlagProduction and Characterisation of Ferromagnetic Nanoscale Metal Powders Produced by Laser Evaporation
Ferromagnetic metallic nanoscale particles were produced by laser evaporation of Co, Fe and Fe3Al targets with vapour condensation in nitrogen, argon or air...
Keywords: Laser Evaporation, Nanoparticles, Saturation Magnetisation, Ferrofluids, Co
01/2006 | Zeitschrift für Physikalische Chemie, Oldenbourg WissenschaftsverlagMagnetic Nanoparticles for Biomedical Heating Applications
In the past, magnetic nanoparticles have found increasing interest in different biomedical applications, e.g. the magnetic hyperthermia of tumor cells or the remote controlled drug delivery to the gut...
Keywords: Hysteresis, Magnetic Losses, Magnetite, Nanoparticles, Specific Heating Power
02/2006 | Zeitschrift für Physikalische Chemie, Oldenbourg WissenschaftsverlagStructural and Magnetic Properties of Ni/NiOxide- and Co/CoOxide Core/Shell Nanoparticles and their possible Use for Ferrofluids
Ni- and Co-nanoparticles of average sizes of about 4 to 10 nm were produced by “physical” means with the cluster source LUCAS based upon laser evaporation into seeding gas and adiabatic expansion into an UHV experimentation chamber...
Keywords: Nanoparticles, Ferrofluids, Magnetic Properties, Oxide Nanoparticles, Core/Shell Nanoparticles
02/2006 | Zeitschrift für Physikalische Chemie, Oldenbourg WissenschaftsverlagSynthesis of Monodisperse PbS Nanoparticles and Their Assembly into Highly Ordered 3D Colloidal Crystals
We describe the synthesis of highly monodisperse PbS nanocrystals using an organometalic approach, whereby oleic acid and tri-n-octylphosphine serve as stabilizing ligands...
Keywords: Nanoparticles, Self-Assembly, Colloidal Crystals
03/2007 | Zeitschrift für Physikalische Chemie, Oldenbourg WissenschaftsverlagProcessing of High Density Manganese Zinc Nanoferrites by Co-Precipitation Method
Nanoparticles of spinel ferrites MnxZn1-xFe2O4 with x = 0.0 to 1.0 were prepared by co-precipitation method...
Keywords: Nanoparticles, Direct Current Resistivity, activation energy, Porosity, X-ray diffraction
07/2007 | Zeitschrift für Physikalische Chemie, Oldenbourg WissenschaftsverlagTheoretical Trends in Particle Size Effects for the Oxygen Reduction Reaction
A simple, first principles-based model of the oxygen reduction reaction (ORR) is used to determine ORR kinetics on the (111), (100), and (211) facets of eleven transition metals (Au, Ag, Pt, Pd, Ir, Cu, Rh, Ni, Ru, Co, Fe)...
Keywords: Density functional theory, Oxygen Reduction Reaction, Structure Sensitivity, Nanoparticles, Size effect
09/2007 | Zeitschrift für Physikalische Chemie, Oldenbourg WissenschaftsverlagSolving the 3D structure of metal nanoparticles
We discuss methods of Extended X-ray Absorption Fine-Structure (EXAFS) analysis that provide three-dimensional structural characterization of metal nanoparticles, both mono- and bi-metallic...
Keywords: Nanoparticles, Nanoalloys, EXAFS, Structure analysis, Short range order
11/2007 | Zeitschrift für Kristallographie, Oldenbourg WissenschaftsverlagVibrational properties of metallic nanoparticles
This brief overview discusses the structure and vibrational dynamics of metallic nanoparticles. The theoretical results are derived from molecular dynamics simulations using empirical tight-binding potentials...
Keywords: Nanoparticles, Vibrational density of states, Molecular dynamics simulations, Empirical tight-binding potentials
11/2007 | Zeitschrift für Kristallographie, Oldenbourg WissenschaftsverlagSynthesis of Zirconium Nanoparticles by Ultrafast Laser Ablation
We report the results of the ablation of a zirconium rod in isopropyl alcohol employing a titanium sapphire femtosecond laser system operated at sub-800nm wavelengths with a fluence of 2mJ/pulse and a 10Hz pulse rate...
Keywords: laser ablation, Transition Metals, Nanoparticles, Zirconium, Colloids
11/2007 | Zeitschrift für Physikalische Chemie, Oldenbourg WissenschaftsverlagThe formation and characterization of three-dimensional gold nanocrystal superlattices
Highly-ordered, three-dimensional superlattices were self-assembled from dodecanethiol-ligated gold nanocrystals using a simple drop-drying technique...
Keywords: Nanocrystals, Nanoparticles, Self-Assembly, GISAXS, Supercrystals
11/2007 | Zeitschrift für Kristallographie, Oldenbourg Wissenschaftsverlag