Experiment Research on the Sequence and Mechanism of Gold and Silver Composite Nanocrystal Synthesis

TL;DR

This paper investigates the synthesis mechanisms of gold-silver composite nanocrystals, comparing different sequences of synthesis and characterizing the resulting nanocrystals using various techniques.

Contribution

It proposes two possible synthesis mechanisms for gold-silver nanocrystals and analyzes how synthesis sequence affects their formation.

Findings

Different synthesis sequences lead to distinct nanocrystal structures

Characterization techniques reveal differences in size and morphology

Exotic phenomena observed during synthesis are discussed

Abstract

In this experiment, the authors reviewed the principles and methods for the synthesis and characterization of gold-silver nanocrystals and proposed two possible synthesis mechanisms for Gold and Silver Composite Nanocrystals. Gold nanocrystals, silver nanocrystals, and Gold and Silver Composite Nanocrystals were prepared by the "Sodium citrate seedless method"(Turkevich Method). The products were characterized by dynamic light scattering (DLS), ultraviolet-visible light spectroscopy (UV), and scanning electron microscopy (SEM). Through comparative experiments, synthesis mechanisms behind different synthesis sequences of gold-silver nanocrystals are analyzed. Observed exotic phenomena are discussed.