Superuniform spherical gold nanoparticles
Shanghai Kinbio Tech. Co., Ltd.
We are engaged in the promotion of lateral flow technology, related equipment & consumables for R&D work and production.
Introduction
Gold nanoparticles, with their excellent conductivity, stability, biocompatibility, and surface optical properties, have irreplaceable roles in optics,catalysis,electronics, immunodiagnosis, biosensors, biological imaging, and drug delivery. At present, sodium citrate reduction method is a classic method for preparing gold nanoparticles, but the prepared gold nanoparticles have irregular shapes, and their uniformity and stability are not ideal. Therefore, the preparation of gold nanoparticles with different particle sizes that have regular shapes, uniform particle sizes, good dispersibility, and stable properties is an urgent problem to be solved in current production. We first used chemical reduction method to prepare 5-15 nm small diameter super uniform spherical gold nanoparticles. Using small diameter spherical gold nanoparticles as seeds, we used seed growth method to prepare 20-200 nm super uniform spherical gold nanoparticles. The spherical gold nanoparticles prepared by this method have uniform particle sizes, regular shapes, and uniform dispersion; Depending on the particle size, it presents different colors in aqueous solution, such as orange, red, magenta, and brick red.
Preparation of gold nanoparticles with different particle diameters
Methods: Prepare 5 to 15 nm super uniform spherical gold nanoparticles with chemical reduction method. Using 15 nm gold nanoparticles as seeds, prepare 20 to 200 nm super uniform spherical gold nanoparticles with seed growth method.Then characterize the prepared gold nanoparticles.
Results：
Conclusion：
Uniform particle diameters, regular shape, small coefficient of variation.
Stable quality, stored at 4 ℃ for 2 years.
The production capacity is sufficient, with a batch capacity of up to 2000L,
ensuring a stable batch capacity of up to one million liters per year.
Customizable according to user needs.
The colloidal gold solution can be ordered with particles diameter from 10 to 80 nm, with minimum order of 20 ml.