Facile syntheses of monodisperse ultrasmall Au clusters

Article Abstract:

A report that monodisperse [Au.sub.11] clusters and bimodal distributions of [Au.sub.8] and [Au.sub.10] could be produced by reducing a Au(I) precursor in the presence of bidentate phosphine ligands is presented. Results reveal that the cluster size could be varied by simply varying the length of the spacer separating the P atoms in the ligand and that certain diphosphine ligands could be extremely size-selective.

Industrial Gas Manufacturing, Industrial gases, Analytical Laboratory Instrument Manufacturing, Analytical instruments, Gold Compounds, Phosphine, Ion Mass Spectroscopy, Mass spectrometry

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Analyzing the structure of CoFe-Fe(sub 3)O(sub 4)-shell nanoparticles by electron imaging

Article Abstract:

The step-by-step techniques used for identifying the structure of the CoFe-Fe(sub 3)O(sub 4) nanoparticles, which are composed of ~4-nm CoFe cores and covered with ~3-nm Fe(sub 3)O(sub 4) polynanocrystallites are demonstrated. The techniques demonstrated are general and can be adopted for analysis of any nanoparticles of interest in physical chemistry.

Cobalt Compounds, Iron compounds, Transmission electron microscopes

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Bio-functionalization of monodisperse magnetic nanoparticles and their use as biomolecular labels in a magnetic tunnel junction based sensor

Article Abstract:

The bio-functionalization and detection of 12-nm manganese ferrite nanoparticles (NPs) is reported. A novel method of detecting either protein binding or DNA hybridization at room temperature using the NPs and magnetic tunnel junction (MTJ) biosensor situated in orthogonal magnetic fields is demonstrated.

Electrometallurgical products, Electrometallurgical Ferroalloy Product Manufacturing, Ferromanganese, Analysis, Biosensors, Protein binding

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