Nanopartz^TM has developed a brand new material – Microgold^TM - the largest monodisperse gold particles available.  Microgold^TM are hundreds of nanometers in the transverse dimension and up to 1 micron in lengths.  Microgold^TM are the largest known "nanoparticles" available - and the largest that can still be considered nanoparticles.  These particles match the wavelength of light in the longitudinal dimension providing single particle detection under white light microscopy or dark field microscopy with simple instrumentation.  They have approximately 100 times the scattering cross section as a 100 nm spherical gold nanoparticle, 100,000 to 1,000,000 times the scattering of a 1.4 nm gold nanoparticle. As with all of  Nanopartz^TM products, they are highly monodisperse.

 

Two sizes are available, 150x800nm and 200x1000nm. 

 

Features

• Largest known gold nanomaterial

• Single particles can be seen in white light microscopy

• Many conjugation options

Benefits

• Perfect for microscopy labeling without silver growth

• Applications in tribological additives

• Large size enables use as labels in electron microscopy

 

SEM of 150x800nm GMRs

Composition

The bare Microgold^TM are shipped in  DI water with < 0.1% ascorbic acid and < 0.1% CTAB surfactant capping agent.  The conjugated Microgold^TM are shipped n DI water at pH=7.0 and have the CTAB reduced to < 0.0001%.

Custom Formulation

The transverse size is 30 nm with two initial standard lengths of 150 and 1000 nm.  All orders come with a Certificate of Analysis.  Other sizes are special order.  Please contact us.

Products

 

For larger quantities, or for orders amounting over 1 L per annum, please contact sales for quantity pricing.

 

Delivery

All shipments are made Fed Ex Standard Overnight delivery. No shipments on Fridays.

Conjugation

Unlike spherical gold nanoparticles where the net surface charge is negative thereby affording passive antibody adsorption, Microgold^TM have a net positive surface charge.  Consequently, it is strongly recommended that for conjugating you purchase our custom conjugation services.

Conjugation Part Number Description

70-XXX-YYY are the bare Microgold^TM where XXX is the transverse diameter (either 150 or 200 nm) and YYY are the lengths (800 or 1000nm).  70-P(A,B,C,M,N)-XXXX are the conjugated nanorods where A, B, C, M, and N stand for amine, biotin, carboxyl, methyl and neutravidin, respectively, and YYY are the lengths in (nm) (either 800 or 1000nm).