Zero-valent copper nanoparticles (Cu⁰ NPs), which consist of metallic copper in its zero oxidation state, are a class of metallic nanomaterials with exceptional physical, chemical, and electrical properties. Thanks to their unique capabilities, they find extensive applications across various industries including electronics, catalysis, environmental remediation, and medicine. Their ultra-small size (1–100 nm) significantly increases the surface-to-volume ratio, greatly enhancing their surface reactivity and functional properties.
| Feature | Description |
| Metallic copper with FCC crystalline structure at the nanoscale | Metallic and Crystalline Structure |
| Excellent electrical and thermal conductivity, comparable to silver in some applications | High Conductivity |
| Strong catalytic activity in redox reactions, organic synthesis, and pollutant degradation | Catalytic Activity |
| Significant antibacterial and antiviral effects, especially in medical and sanitizing uses | Antimicrobial Properties |
| Dispersible and stabilizable via polymer or surfactant coatings to prevent oxidation | Dispersibility and Stability |
Cu⁰ nanoparticles serve as highly effective catalysts in various chemical reactions such as hydrogenation, coupling reactions, and oxidations. They improve reaction efficiency and lower energy consumption.
Due to their excellent conductivity and lower cost compared to silver and gold, Cu NPs are used in conductive inks, printed circuit boards, biosensors, and flexible electronic devices.
They are employed in advanced oxidation processes for the removal of pollutants, heavy metals, and toxic organic compounds from water through catalytic and adsorption mechanisms.
Cu⁰ nanoparticles are incorporated into antimicrobial coatings, medical devices, wound dressings, and disinfectant products due to their strong bactericidal and virucidal properties with controlled toxicity.
The incorporation of Cu NPs into polymers and ceramics enhances mechanical strength, conductivity, and corrosion resistance, with applications in automotive, aerospace, and packaging industries.
