Metal cobalt nanoclusters

Kem and coworkers have also explored controllable, uniform metal deposition by employing TMV as a biotemplate. In their studies, the addressable amino acid side chains that function as metal nncleation sites are first activated with a metal complex, followed by incubation with the desired metal for metallization and its subsequent chemical reduction to form metal nanoparticles. By employing this approach of electroless deposition, discrete nickel, silver, and cobalt nanoclusters were selectively formed on the interior or exterior of the virus by controlling the pH and the activation complex used in the reaction. In addition... 

The issue whether the true catalyst is the metal(O) nanoparticles or their aggregated form bulk metal has not been address in that report. However, the sole stabilizer present in the system for all of the precursors used [162] is the weakly coordinating chloride anion which cannot provide enough stabilization for the metal(O) nanoclusters, not imexpectedly, based on a previous study ranking the anions in the order of their abilities to stabilize the metal(O) nanoparticles, whereby the chloride anion has been found to be the weakest stabilizer for the iridium(O) nanopartides [163]. Consequently, ruthenium(O), rhodiiun(0), cobalt(O), and pal-ladium(0) nanoparticles putatively generated could not be stabilized by chloride anions and... 

Metallic species such as iron, nickel and cobalt are known to catalyze the growth of CNTs in the CVD process [168-170]. Because of the ready thermal curability of the hb-PYs, spin-coated films of organometallic polymers 81 and 82 are expected to restrict the agglomeration of the metallic nanoclusters in the CVD process and hence to provide nanoscopic catalyst seeds for the... 

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