Physiochemical methods for gold particles|Physical and Chemical methods
Channel: NanoTech
Date: 2024-04-08

In this video, we shall discuss about the physiochemical methods for gold particles.  
#goldnanoparticles #physio 

There are several physiochemical methods for synthesizing gold nanoparticles, including:

1. **Chemical reduction**: Gold ions are reduced by a chemical agent, such as sodium borohydride or citrate, in the presence of a stabilizing agent to prevent aggregation.

2. **Microemulsion**: Gold nanoparticles can be synthesized in water-in-oil microemulsions, where gold ions are reduced within the water droplets, leading to nanoparticle formation.

3. **Photochemical reduction**: UV light or laser irradiation is used to reduce gold ions to nanoparticles in the presence of a reducing agent.

4. **Electrochemical synthesis**: Gold nanoparticles can be synthesized by applying an electrical potential to a solution containing gold ions, leading to their reduction and subsequent nanoparticle formation on an electrode surface.

5. **Green synthesis**: Biological entities, such as plant extracts or microorganisms, are used as reducing agents to synthesize gold nanoparticles in an environmentally friendly manner.

Each method has its own advantages and limitations, and the choice depends on factors such as desired nanoparticle size, shape, and surface properties, as well as scalability and cost considerations.


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