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BioPure Gold Nanospheres – Bare (Citrate)

Citrate is one of our most popular surface options; the “bare” surface is ideal for displacement with other molecules or ligands. Learn more ❯

BioPure materials are high quality, unagglomerated, and monodisperse nanoparticles. Extensively purified and provided with low endotoxin. Ideal for in-vivo and in-vitro research applications. Learn more ❯

5–40 nm diameter particles provided at 1 mg/mL in water; 50–100 nm diameter particles provided at 1 mg/mL in aqueous .2 mM sodium citrate.

Need particles for conjugation? See BioReady Gold.

Don’t see the size you’re looking for? Please contact us about custom and semi-custom ordering.

Select Diameter
Concentration & Solvent
Select Volume

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

Typically ships within 5 business days

Product number: AUCB5-1M

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Specifications & CoA

TEM Diameter Size Distribution (CV) Example Certificate of Analysis
(How do I read this?)
5 nm ± 1 nm ≤ 18% Download Example CoA
10 nm ± 2 nm ≤ 12% Download Example CoA
20 nm ± 3 nm ≤ 15% Download Example CoA
30 nm ± 3 nm ≤ 15% Download Example CoA
40 nm ± 4 nm ≤ 15% Download Example CoA
50 nm ± 4 nm ≤ 15% Download Example CoA
60 nm ± 4 nm ≤ 15% Download Example CoA
80 nm ± 5 nm ≤ 15% Download Example CoA
100 nm ± 5 nm ≤ 15% Download Example CoA

Note: approximate ranges below are dependent on diameter

  • Endotoxin Concentration: < 2.5 EU/mL (< 5. EU/mL for ≤ 20 nm sizes)
  • Hydrodynamic diameter (DLS): TEM diameter plus 2 to 12 nm
  • Zeta potential: –15 to –60 mV
  • pH of solution: 5.5 to 8.0
  • Particle surface: Sodium citrate
  • Solvent: USP purified water or .2 mM sodium citrate solution
  • Peak wavelength (λmax): 515 to 560 nm

Molarity and particle concentration table ❯


More Info & Documentation

nanoComposix University

Peer-Reviewed Papers

AUCB 5nm 10nm 15nm 20nm 30nm 40nm 50nm 60nm 80nm 100nm



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