Breakthrough in Silver Nanoparticle Production: Improved Stability and Size Control

Strategic Insights -

Researchers at NOBEL/Noble Elements/LLC have made a significant advancement in the production of silver nanoparticles, achieving highly stable and concentrated dispersions with precise control over particle size. This innovation is poised to impact a wide range of applications, from medical devices and cosmetics to antimicrobial and antiviral agents.

Key Takeaways:

  • The patent, filed on March 1, 2022, and published on June 10, 2025, describes a method for producing highly stable concentrated dispersions of silver nanoparticles using synergistic dispersing agents.
  • The method involves dissolving a combination of a reducing dispersant and a co-dispersant in deionized water, adding silver oxide, and mixing the slurry with a basic solution to form an alkaline basic slurry.
  • The resulting silver nanoparticles are highly uniform, with sizes ranging from 5-25 nm, making them suitable for various applications, including medical devices, cosmetics, and antimicrobial and antiviral agents.
  • The use of Arabic gum as the reducing dispersant and sodium alginate as the co-dispersant was found to be particularly effective in producing silver nanoparticles with sizes between 5-15 nm.
  • In preferred embodiments, the method yields silver nanoparticles that are all less than or equal to 25 nanometers (nm) in size, or all less than or equal to 15 nm in size, with an optimum size range of 10 nm.
  • The patent also describes the use of the highly stable concentrated dispersions of silver nanoparticles as antimicrobial, antiviral, anti-inflammatory, and anti-cancer agents, making them a promising tool in the fight against infectious diseases and cancer.

Statistics:

  • The patent describes a method for producing silver nanoparticles with sizes ranging from 5-25 nm.
  • The method yields highly uniform silver nanoparticles with a FWHM (Full Width at Half Maximum) less than 0.1 nm.
  • The optimum size range for the silver nanoparticles is between 5-15 nm.
  • The use of Arabic gum as the reducing dispersant and sodium alginate as the co-dispersant results in silver nanoparticles with sizes between 5-15 nm.
  • The patent also describes the use of the highly stable concentrated dispersions of silver nanoparticles as antimicrobial, antiviral, anti-inflammatory, and anti-cancer agents.

Sources:

  • Goia, D., "Preparation of highly stable concentrated dispersions of silver nanoparticles using synergistic dispersing agents." U.S. Patent Number 12324815, filed March 1, 2022, and published online on June 10, 2025.
  • Goia, D. V., Balantrapu, K., "Journal of Materials Research 24, 9 (2009) 2828-2836."
  • U.S. Pat. No. 7,842,274.