10 nm Gold Nanoparticles - Spherical, Citrate-Coated

Overview:

These 10 nm citrate‑coated gold nanospheres provide a well‑defined, monodisperse platform for optical assays, bioconjugation, and method development in diagnostics and bioanalytical research. Their controlled size, surface chemistry, and optical response make them a robust starting point for reproducible nanoparticle‑based experiments.

Key Specifications:

Core diameter 10 nm, narrow size distribution:

- CoV (Coefficient of variation) ≤ 5%, Polydispersity index (PdI) ≤ 0.1. Learn Why is Monodispersity Important.

Morphology:

- spherical gold nanoparticles (nanospheres), no other shapes. 

Surface:

- citrate‑coated for electrostatic stabilization, negative surface charge. Discover What is True Citrate Surface.

Matrix: 

- reactant-free, in Milli-Q water (18.2 MΩ-cm). Find out Why should Stabilizing agents be Avoided.

Supplied with:

- Lot-specific Certificate of Analysis including TEM images, size distribution, UV-vis spectra, PdI, hydrodynamic diameter, Zeta-potential, etc.

Consult a typical CoA for 10 nm Gold Nanoparticles, Citrate Surface.

Surface Chemistry and Conjugation

The citrate layer provides a negatively charged, weakly bound capping that can be readily displaced or over‑coated for protein, peptide, or oligonucleotide attachment. This controllable surface chemistry supports both passive adsorption and covalent coupling strategies, enabling predictable ligand loading and assay‑to‑assay consistency. Discover Why is Surface Chemistry a real "product" for Gold Nanoparticles.

Optical Properties

These gold nanospheres exhibit characteristic plasmonic absorption and scattering suitable for colorimetric and spectroscopic readouts. Their optical density and extinction profile are optimized for applications such as lateral flow test visualization, microplate assays, and microscopy‑based detection.

Applications

Citrate‑coated 10 nm gold nanospheres are suited for antibody and aptamer conjugates, biosensing platforms, and imaging probes. They can be integrated into lateral flow formats, ELISA‑type assays, and proof‑of‑concept drug delivery or cell interaction studies where well‑characterized colloidal gold is required. Please visit Biocompatible Nano-Gold for more applications details.

Quality Control and Batch Reproducibility

Each lot is manufactured using controlled synthesis protocols and is characterized for core size, size distribution, plasmon peak position, and colloidal stability. Tight lot‑to‑lot reproducibility reduces re‑optimization effort and helps maintain consistent performance across development and production runs. See Comparison of Three Independent NanoBrand Gold Nanoparticles Lots. 

Eco-friendly synthesis:

Our Green chemistry approach minimizes the use of harsh reagents and reduces the environmental impact of nanoparticle production, aligning with sustainable research practices.

Storage and Expiration:

The nanoparticles are supplied ready‑to‑use in liquid form, with recommended storage conditions indicated on the Certificate of Analysis. To maintain colloidal stability, avoid freeze‑thaw cycles and follow the guidelines for dilution, mixing, and conjugate preparation. Products can be used for at least one year. If kept longer, measurement of UV-vis spectra is recommended to confirm products stability. Storage at lower temperatures is preferable for increasing the shelf life - DO NOT FREEZE.

Safety and Handling:

NanoBrand does not guarantee the suitability of its products for any particular application. It is the customer’s sole responsibility, prior to use, to determine that the product is suitable and permitted for the customer’s intended use and application. Please consult our Terms of Service. 

Go back to Gold Nanoparticles - Spherical, Citrate Surface.

Discover Gold Nanoparticles for Lateral Flow Assays and Gold Nanostars.