"Thanks for the 10x45nm Au-nanorods... They are very precise. Our EM pictures indeed show nanorods great in size monodispersity and shape uniformity."

Dr. Periklis Pantazis
California Institute of Technology
Beckman Institute

"We were previously making our own gold nanoparticles using the commonly used technique of citrate reduction of Au(III). The colloids generated are broadly polydisperse, and we were concerned that our application of these particles in immuno-gold labeling of cells for optical coherence microscopy (OCM) would be utilizing only the large diameter tail of the distribution. We purchased the sampler package of NanoPartz gold spheres (30 nm, 50 nm, 70 nm, 90 nm) and examined each size carefully with dynamic light scattering, OCM, and spectrophotometry. Our measurements indicated diameters a couple nanometers larger than specifications (a result of measurements on the fully hydrated state?), and remarkable monodispersity - within specs. It is clear to us now that our early immuno-gold results were dominated by the largest diameter spheres of our early colloids. We are delighted by the NanoPartz monodisperse preparations and recommend them strongly!"

Dr. Richard C. Haskell
Professor of Physics & Director of Physics Clinic
Physics Department
Harvey Mudd College

"The scientists at Nanopartz have developed a line of colloidal gold nanorods with extremely high monodispersity in size, shape, and mass. The surfactant layer is highly stable and readily displaced for biofunctionalization. In every test, in vitro and in vivo, these materials have exceeded our expectations."

Geoffrey A. von Maltzahn

NSF and Whitaker Graduate Fellow

Harvard-MIT Division of Health Sciences and Technology

Laboratory for Multiscale Regenerative Technologies

"Nanopartz has developed excellent colloidal nanoparticle samples with high stability and dispersity, suitable for a range of applications including SERS. We have had a very positive experience using the material provided by Nanopartz."

Arash Jamshidi
Graduate Student Researcher
University of California, Berkeley