Gold nano-clusters

Choudhary TV, Goodman DW. 2002. Oxidation catalysis by supported gold nano-clusters. Top... 

Ohyama J, Esaki A, Yamamoto Y, Arai S, Satsuma A (2013) Selective hydrogenation of 2-hydrox5onethyl-5-furfural to 2,5-bis(hydroxymethyl)furan over gold sub-nano clusters RSC Adv 3 1033-1036... 

NanO Element Category (Saturated Shell, JHlJtype) (Gold Metal, Nano-clusters)... 

The first introduction of gold and silver colloid staining methods dates back into the mid 20th century. Following decades of simple bio-assays based on deposition and aggregation of nano particles the signal transduction by metal nano clusters has... 

Distinct color changes results fi om the formation of aggregates of the nano clusters out of individual colloidal particles and further precipitation of the aggregated nano clusters. A gold sol will turn from red to violet on aggregation and ftirther on to blue on coalescence and precipitation (Figure 13). This color change can be followed by eye or spectroscopically. 

Recently, various sol-gel based recipes incorporating metal colloids have been shown to result in successful SERS substrates (49, 50, 52-57). Large Raman enhancements have been found for nano-sized metal particles dispersed in the resulting gel structure, in part, due to the large stabilized metal surface areas available to molecular-sized scatterers. In contrast, the sol-gel derived SiOa SERS substrate produced by the procedure described here is covered by immobilized clustered aggregates of monodispersed sized gold nano-particles that have been grown in-situ. 

Schwerdtfeger, P. (2003) Gold Goes Nano - From Small Clusters to Low-Dimensional Assemblies. Angewandte Chemie International Edition, 42, 1892-1895. 

Habeeb Muhammed MA, Ramesh S, Sinha SS et al (2008) Two distinct fluorescent quantum clusters of gold starting from metallic nanoparticles by pH-dependent ligand etching. Nano Res 1 333-340... 

The formation-growth of gold clusters was monitored by UV-Vis spectroscopy, by looking at the very intensive surface plasmon absorption characterizing nano-sized gold. Optical spectra were recorded at different reaction... 

Wang G, Murray RW (2004) Controlled assembly of monolayer-protected gold clusters by dissolved DNA. Nano Lett 4 95-101... 

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