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Colloidal gold

Ultra high quality gold nanoparticles

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Colloidal Gold

Innova Biosciences colloidal gold nanoparticles are developed using specialized techniques that enable the production of extremely uniform spherical particles with a very narrow size distribution, minimizing variability within your assay.

Using our proprietary production protocols we can very quickly produce large quantities of gold nanoparticles, without compromising on quality. Get in touch for more information on bulk orders.

Features and Benefits

Features Benefits
Different nanoparticle sizes and concentrations available Flexible
Fully scalable - available at high concentration (>20 OD) and large volume (litres) Easy transfer from R&D to manufacturing
Can be used in a wide range of applications Flexible
Stringently QC tested Consistent high quality, excellent batch-to-batch reproducibility
Fully scalable (10ug to 1g or more) Easy transfer from R&D to manufacturing
Uniform spherical shape and narrow size distribution Batch-to-batch consistency
Competitively priced Cost-effective

 Please do not hesitate to Contact us to find out more!

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Bulk Quantities

We use specialized techniques that enable the quick and easy production of large quantities of gold nanoparticles, without compromising on quality. To request pricing on large quantities please get in touch


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gold nanoparticles

Figure 1. Comparison of Innova Biosciences gold nanoparticles with those of a leading competitor in a lateral flow assay test for CRP. Two different monoclonal antibodies (clones C5 and C7) were conjugated to gold using identical techniques. Innova's gold colloid shows higher signal intensity than competitor gold with both antibodies, under identical conditions. 

gold nanoparticles

Figure 2. Electron microscopy images of different 40nm gold particles demonstrating consistency of size and shape. Note the consistent size and shape of our gold nanoparticles (middle) compared to market leading competitor A (presence of hexagons and triangles) and market leading competitor B (highly inconsistent sized particles).

Innova Biosciences’ gold nanoparticles are available in many sizes, please select the option that best fits your needs:

1 OD 10nm gold nanoparticles [More info]

1 OD 40nm gold nanoparticles [More info]

10 OD 10nm gold nanoparticles [More info]

10 OD 40nm gold nanoparticles [More info]

15 OD 40nm gold nanoparticles [More info]

20 OD 40nm gold nanoparticles [More info]

Can’t find what you were looking for? Contact us for a to find out more about our custom services.

Related Products

innovacoat gold kit components

Gold nanoparticle conjugation kits

InnovaCoat® GOLD is a one-step gold nano-particle conjugation kit for antibodies, proteins and peptides or any other biomolecule with an amine group. Read more

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Purification kits for nanoparticles

Commercially available antibodies often contain substances (e.g. BSA, glycine, tris, and azide) that interfere in labeling reactions. We have developed a range of purification kits which allow for easy and rapid purification of antibodies from any buffer formulation. All products are easy to use and are fully compatible with our nanoparticle kits. Read More

1. What is the shelf life of Innova Biosciences Colloidal gold?

Our colloidal gold is guaranteed to be stable for up to two years from manufacturing in an unopened bottle stored at 4⁰C. It is recommended to use the colloidal gold within six months from opening.

2. What is the best storage condition?

It is recommended to store the colloidal gold at 4⁰C and use them at room temperature. Freezing must be avoided as it leads to irreversible particle aggregation and the formation of a black precipitate.

3. Is it normal for nanoparticles to settle out of solution?

Yes, this can happen especially with larger size gold nanoparticles (40-80nm). The particles might settle at the bottom of the bottle, leaving a clear solution. This process is reversible: the particles can be resuspended by gently inverting the bottle a few times.

4. In which buffer are the nanoparticles provided?

Our colloidal gold nanoparticles undergo a buffer exchange to remove any residual manufacturing products and are suspended in citrate buffer.

5. How are the gold nanoparticles characterized?

Each batch of colloidal gold, both 10nm and 40nm sizes, is analysed by TEM and UV-Visible spectroscopy to ensure high quality standards. Particles specifications, such as mean size, standard deviation and coefficient of variation, are based on more than 100 single nanoparticle measurements.

6. What if I need more concentrated gold nanoparticles for my applications?

Colloidal gold can be centrifuged, but this might lead to aggregation and impossibility to resuspend the nanoparticles. Our range includes gold nanoparticles concentrated up to 20 OD, but upon request we can also manufacture colloidal gold at a higher OD.

Please get in touch for further information.

7. What is your production scale?

We are able to manufacture colloidal gold in bulk quantities to support any scale of operation, still keeping consistent our quality standards.

Please get in touch with us for further information and to request a quote.


10 40
Lateral Flow     ● Sphere
Western Blots     ● Sphere
Dot Blots     ● Sphere
Dark Field microscopy     ● Sphere
Electron microscopy   ● Sphere
Metal enhanced fluorescence     ● Sphere/flat surface
SERS     ● Not spherical
FRET quench   ●   ● Sphere
Infrared phototermal therapy     ● Rod/hollow sphere
Radiofrequency ablation   ● Sphere
Drug delivery   ●   ● Rod/sphere

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