Gold Nanoparticles

Product Overview
Gold nanoparticles, also known as colloidal gold, are a system where gold nanoparticles are dispersed in a solution. Common preparation methods include the sodium citrate reduction of chloroauric acid (seed-growth method) and electrochemical synthesis. The color of the gold nanoparticle solution changes with the particle size. Larger particles shift the absorption wavelength of the solution toward longer wavelengths, displaying complementary colors.

Features

• Optical Properties: Exhibits surface plasmon resonance, showing specific absorption and scattering spectra. This makes it widely used in biomedical detection, optical imaging, and other fields.
• Color Change: The color of colloidal gold changes depending on the particle size.
• Stability: High chemical stability.
• Biocompatibility: Low toxicity to biological systems, making it suitable for drug delivery and biological labeling in medical applications.
• Catalytic Properties: Acts as a catalyst in certain chemical reactions, demonstrating excellent catalytic performance.

Applications

• Biomedical Field: Utilized for immunoassays, sensor detection, and disease diagnosis through surface plasmon resonance; also used for targeted drug delivery.
• Chemical and Materials Science: Serves as a catalyst in chemical reactions; can be used as a base material for nanomaterial preparation.
• Optical Field: Used to make optical sensors, filters, and other optical devices; enhances Raman signals for analytical testing.
• Electronics Field: Applied in the production of nanoelectronic devices.
• Environmental Monitoring: Used for pollutant detection with high sensitivity.