Colloidal Gold Nanoparticles

Product Overview
Colloidal gold nanoparticles are formed by dispersing gold nanoparticles in a solution. They are commonly prepared using methods like sodium citrate reduction of chloroauric acid (seed-growth method) or electrochemical synthesis. The size of the gold nanoparticles directly influences the color of the solution. Larger particle sizes cause the absorption wavelength to shift toward longer wavelengths, resulting in distinct color characteristics.

Features

• Optical Properties: Gold nanoparticles exhibit surface plasmon resonance, showing unique absorption and scattering spectra. This makes them widely used in biological detection and optical imaging.
• Stability: Chemically stable and adaptable to various environmental conditions.
• Biocompatibility: Low toxicity to biological systems, making them suitable for biomedical applications such as drug delivery and biological labeling.
• Catalytic Properties: Act as catalysts in certain chemical reactions, showing significant catalytic activity.

Applications

• Disease Diagnosis: Used in immunoassays and biosensors to detect diseases based on surface plasmon resonance.
• Medical Imaging: Can be used as a contrast agent for imaging techniques like MRI (Magnetic Resonance Imaging).
• Drug Delivery: Capable of loading drugs and delivering them to specific targets in the body.
• Catalyst: Demonstrates excellent catalytic activity in various chemical reactions.
• Nanomaterial Preparation: Serves as a foundational material for constructing other nanostructures.
• Optical Devices: Used in the manufacture of advanced optical sensors, filters, and other devices.
• Surface-Enhanced Raman Scattering (SERS): Significantly enhances Raman signals, useful for analysis and detection.
• Electronic Components: Used in the production of nanoelectronic devices.
• Pollutant Detection: Provides high sensitivity in detecting specific pollutants.