1. INTRODUCTION Detection of chemical and biological agents plays a fundamental role in
biomedical, forensic and environmental sciences 1− 4 as well as in anti bioterrorism …

A new class of materials for catalysis have been intensively investigated, that is,'bimetallic
nanoparticles'. Extensive studies of non-supported bimetallic nanoparticle dispersions …

If a metal particle with bulk properties is reducedto a size of a few dozen or a few hundred
atoms, the density of states in the valence band and the conductivity band, respectively …

The word “colloid” was introduced for the first time by Graham in 18611 to describe the very
slow sedimentation and noncrystalline state, two characteristic appearances of aqueous …

Water is one of the essential enablers of life on earth. Beginning with the origin of the
earliest form of life in seawater, it has been central to the evolution of human civilizations …

Au colloids have been prepared by reduction of metal salt with UV irradiation in the
presence of dendrimers. Poly (amidoamine) dendrimers with surface amino groups for …

Stabilized concentrated citrate-reduced silver nanocolloids for use as pigments in ink-jet
inks were prepared. Carboxymethyl cellulose was used as a polymeric stabilizer providing …

A modification of the polyol process has enabled the direct synthesis of nm-sized Ag
particles with narrow size distribution and controlled average dimension embedded in a …

Colloidal silver catalysts protected by poly (N-vinyl-2-pyrrolidone)(PVP) were prepared by
an ethanol reduction method of silver perchlorate in the presence of PVP. Transmission …

Colloidal gold has been prepared by UV irradiation (X= 253.7 nm) of some water-insoluble
complexes formed between AuCLf and cationic surfactants dodecylpyridinium chloride …