❮ Spherical

BioReady Gold Nanospheres – Streptavidin·

Streptavidin tetramer is covalently bound to the particle surface via an amide bond. 40 nm streptavidin gold conjugates can be used for convenient conjugation of any biotinylated antibody, protein or oligonucleotide.

BioReady products are specially formulated for the attachment of a molecular recognition element such as an antibody for lateral flow and biodiagnostics. Learn more ❯

Provided at 10 OD in an aqueous conjugation buffer composed of 1× PBS, 0.5% BSA, and 0.05% azide.


Don’t see the size you’re looking for? Please consult our Last Call list or contact us about custom and semi-custom ordering.

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Bulk purchasing options are available – please contact us if you are interested

Product number: AUIR40-200U

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  Last Call – Discontinued and premium one-off products offered at reduced prices

Specifications & CoA

TEM Diameter Size Distribution (CV) Example Certificate of Analysis
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40 nm ± 4 nm ≤ 15% Download Example CoA

Note: approximate ranges below are dependent on diameter

  • Hydrodynamic diameter (DLS): 50 to 70 nm
  • Zeta potential: < –10 mV
  • pH of solution: 6.8 to 8.2
  • Particle surface: streptavidin
  • Solvent: 1× PBS, 0.5% BSA, and 0.05% azide
  • Peak wavelength (λmax): 520 to 530 nm

More Info & Documentation


nanoComposix University

AUIR 40nm

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