Irizarry R. – TechConnect Briefs

Growth Kinetics of Gold Nanoparticles in Reverse Micelles

Herrera A.P., Vicuña E., Rinaldi C., Castro M.E., Irizarry R., Briano J.G., University of Puerto Rico, US

Gold nanoparticles were formed from the reduction of gold (III) in reverse micelles and monitored with a stopped flow analyzer. The gold and the reducing agent micelles were formed in isooctane and AOT (as surfactant). [...]

A New Wet Chemical Approach to the Selective Synthesis of Silver Nanowires

Hernandez E.A., Posada B., Irizarry R., Castro M.E., The University of Puerto Rico, US

A new wet chemical approach is presented for the selective synthesis of silver nanowires based on the assembly of silver nanoparticles covered with a bi-functional thiol. The particles are formed spontaneously upon the addition of [...]

Polydisperse Mixture of Gold Nano-Particles

Vicuña E., Viera O., Briano J.G., Castro M., Irizarry R., University of Puerto Rico, US

Colloids synthesized in water media, usually from direct reduction of a salt, always exhibit a size distribution, which may be characterized by TEM or SEM measurements. These are in essence polydisperse systems with a dispersion [...]

Raman Spectroscopy Study of SOx Species Adsorbed on Au Nanocluster Surfaces

Posada B., Mercado L., Hernandez S., Castro M., Castro W., Murillo L., Briano J., Irizarry R., Ishikawa Y., Castro M., Castro W., The University of Puerto Rico at Mayaguez, US

The reduction of Au3+ with SO3-2 is known to lead to the formation of gold nanoculsters and SO4-2 : n Au3+ + SO3-2 à + Aun + SO4-2 equation 1 This reaction is fundamental in [...]

Real Time Kinetic Measurements of Silver Nanocluster Growth

Mercado L., Castro M.E., Castro W., Vicuña E., Briano J.G., Ishikawa Y., Irizarry R., Solá L., Castro M.E., Castro W., University of Puerto Rico, US

Metallic clusters of noble metals are of tremendous technological importance due to their conduction properties, size, low reactivity and optical properties. Clusters containing as few as two and four silver atoms have been prepared in [...]

Growth Kinetics of Gold Nanoparticles

Murillo L.E., Viera O., Vicuña E., Briano J.G., Castro M.E., Ishikawa Y., Irizarry R., Solá L., University of Puerto Rico, US

We have measured the growth kinetics of gold nanoparticles in real time. Gold nanoparticles were formed from the reduction of gold (III) in aqueous solution and monitored with a stopped-flow reactor equipped with a diode [...]