In this work, we have investigated the interaction of a high-power Ar+ laser beam, in a continuous multi-line regime, with Ag+-doped glass samples. The samples were subjected to the irradiation after the ion-exchange step. As a result of the irradiation, a peak appears in the absorption spectrum; its evolution depends on both the exposure time and the laser beam power. Interaction of the beam w...

The physical, chemical and optical properties of nano-scale colloids depend on their material composition, size and shape. There is a great interest in using nano-colloids for photo-thermal ablation, drug delivery and many other biomedical applications. Gold is particularly used because of its low toxicity. A property of metal nano-colloids is that they can have a strong surface plasmon resonan...

TA prospect of new development by PetaFLOPS computing is discussed for the industrial research and application in the field of materials sciences based on the TeraFLOPS computing in the Earth Simulator. Two examples of simulations for nano-scale materials are presented for metal clusters by the first principles calculation and water droplets by the classical molecular dynamics. A new possibilit...

The early growth stage and growth evolution to a unique gold (Au) honeycomb nano-network on Si(111)7×7 at room temperature have been studied by direct filled-state and empty-state imaging by scanning tunneling microscopy (STM). The gold honeycomb structure is made up of six triangular gold clusters around the corner hole interconnected to one another in the dimer rows of the Si(111)7×7 substrate.

Fabrication of nano-structured materials has been developed by performing pulsed laser ablation of copper, gold, and silver plates in supercritical CO2. The metal nano-structured particles were successfully generated with allowing the selective generation of clusters. Laser ablation was performed with an excitation wavelength of 532 nm. On the basis of the experimental result, both surface of a...

The Mo(13) clusters we previously reported were derived from MoS(2) flakes prepared from bulk MoS(2), although the nature of the precursor species was not fully understood. The existence of the clusters in the condensed phase was a question. Here we report the preparation of MoS(2) nanoflakes from elemental precursors using the sonochemical method and study the gas-phase clusters derived from t...

Several micrometer long nano-ribbons of sodium etidronate linked Zr4O24 clusters are formed in decimolar concentration. Extraction Na+ leads to stripping into filaments which adopt a hexagonal order and persist after neutralization with ammonia.