Synthesis of Precision Gold Nanoparticles Using Turkevich Method.

Area of Science:

• Nanotechnology
• Materials Science
• Chemical Synthesis

Background:

• Gold nanoparticles (AuNPs) possess unique size-dependent properties, driving diverse applications.
• Large-scale production of precision AuNPs with narrow size distributions remains a challenge.
• Accurate and reliable performance of AuNPs necessitates precise control over size and morphology.

Purpose of the Study:

• To synthesize precision gold nanoparticles (AuNPs) using the Turkevich method.
• To evaluate the advantages and limitations of the Turkevich method for AuNP synthesis.
• To investigate the impact of synthesis parameters on AuNP characteristics.

Main Methods:

• Synthesis of colloidal AuNPs (15-50 nm) via the Turkevich method.
• Systematic study of reagent molar ratios, batch size, gold chloride concentration, and reaction temperature.
• Comprehensive characterization of AuNP morphology, optical properties, surface chemistry, and chemical composition.

Main Results:

• AuNPs synthesized between 15 nm and 30 nm demonstrated well-defined size, shape, and narrow size distribution (polydispersity index [PDI] < 0.20).
• Increasing particle size beyond 30 nm led to more polydispersed and less spherical AuNPs.
• The Turkevich method's effectiveness is size-dependent, with optimal results for smaller AuNPs.

Conclusions:

• The Turkevich method is effective for producing precision AuNPs in the 15-30 nm range.
• Scaling up AuNP synthesis and increasing particle size with this method can compromise monodispersity and shape.
• Further optimization is needed for large-scale, precise synthesis of larger AuNPs.