Silver (Ag) Nanopowder / Nanoparticles

Purity: 99.95%, Size: 28-48 nm, w/~0.25 PVP

Silver (Ag) Nanopowder/Nanoparticles (Purity: 99.95%, Size: 28-48 nm, w/~0.25% PVP) are advanced metallic nanomaterials engineered for enhanced stability and functionality. While silver nanoparticles are already well known for their antimicrobial, catalytic, and optical properties, the addition of a thin PVP (polyvinylpyrrolidone) coating provides critical improvements. PVP acts as a steric stabilizer, preventing particle aggregation and sedimentation, while also improving dispersibility in aqueous and organic solvents. This makes the nanoparticles more suitable for integration into diverse matrices such as polymers, coatings, and biomedical formulations. The combination of high purity, nanoscale dimensions, and surface modification ensures consistent performance in demanding applications ranging from healthcare to electronics.

Technical Properties 

Applications

• Biomedical and Pharmaceutical: PVP-coated silver nanoparticles are highly effective against pathogenic microorganisms such as E. coli and Staphylococcus aureus. Their enhanced stability ensures long-lasting antimicrobial activity, making them suitable for disinfectants, wound healing materials, and drug delivery systems. They are also explored in antiviral and antifungal treatments, with potential roles in advanced therapies including AIDS-related drugs.
• Catalysis: The high surface area and improved dispersibility of PVP-coated silver nanoparticles make them efficient catalysts in chemical reactions. They significantly enhance reaction rates and selectivity, with notable applications in processes such as ethylene oxidation. The PVP layer ensures uniform distribution in catalytic systems, improving reproducibility and durability.
• Electronics and Photonics: Thanks to their electrical conductivity and plasmonic properties, silver nanoparticles are integrated into sensors, conductive inks, and photonic devices. The PVP coating improves compatibility with different solvents and substrates, enabling reliable performance in printed electronics and optical coatings.
• Biological and Scientific Research: In genetic diagnostics and molecular biology, PVP-coated silver nanoparticles provide stable dispersions that enhance detection sensitivity. Their controlled size and surface chemistry make them valuable in bioimaging, biosensing, and targeted research applications.
• Consumer and Household Products: Manufacturers incorporate silver nanoparticles into washing machines, refrigerators, air conditioners, clothing, food containers, and detergents to provide durable antibacterial protection. The PVP coating ensures better dispersion in polymer and textile matrices, extending the functional lifetime of consumer goods.
• Construction and Coatings: Applied in paints and coatings, silver nanoparticles impart antibacterial and corrosion-resistant properties to building materials. The PVP modification improves uniform distribution in coatings, resulting in more consistent protective layers for modern architectural applications.

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