Synthesis of gold nanoparticles dispersion in toluene using immiscible fluid flow in microfluidic device

Abstract

A synthesis of gold nanoparticles dispersion in toluene by mixing immiscible solutions in a microchannel was proposed. The visualization test using red and blue ink aqueous solutions as a substitute for gold ion and reducing agent confirmed that the fluid showed the slug flow at below the flow rate of 0.3 mL/min. The synthesis results found that gold nanoparticles with diameter from 3.0 to 4.1 nm was prepared at slug flow in the microchannel, and size control of gold nanoparticle enable by changing the flow rate.

Mixing Characteristic and High-Throughput Synthesis of Cadmium Sulfide Nanoparticles with Cubic Hexagonal Phase Junctions in a Chaotic Millireactor

“…However, the shape and size of the droplets (or slugs) are closely affected by the two-phase flow rates, and the ordered segment flow patterns might be destroyed to produce laminated flow or disordered flow at large flow rates . Furthermore, it has been demonstrated that the flow rates affect the droplet size, causing differences in the size and dispersibility of the synthesized NPs . Scrupulous control of flow rates is retain the size and shape of droplets (or slugs), and as expected, such control is hard to achieve, especially at high throughput.…”

Functional-Group Effect of Ligand Molecules on the Aggregation of Gold Nanoparticles: A Molecular Dynamics Simulation Study

“…Therefore, determining the factors affecting the aggregation/dispersion behaviors of gold NPs and controlling these behaviors are crucial. Many experimental − and molecular dynamics (MD) simulation studies − have been performed to understand the aggregation/dispersion behaviors of functionalized gold NPs. In these simulation studies, the coarse-grained (CG) model − and realistic atomistic model − are widely used.…”