In situ Study of Au Nanoparticle Growth in a Mechanochemical-Aging-Based Synthesis

22 September 2022, Version 2
This content is a preprint and has not undergone peer review at the time of posting.


As we strive to perform chemical transformations in a more sustainable fashion, inducing reactions through the absorption of mechanical energy has emerged as a highly successful approach. Due to the wide-ranging applications of gold nanoparticles (AuNPs), mechanochemical strategies have already been employed for their synthesis. However, we do not yet fully understand the underlying processes surrounding the gold salt reduction, nucleation and growth of AuNPs in the solid state. Herein, we present a mechanically activated aging synthesis of AuNPs, through a solid-state Turkevich reaction. Solid reactants are only briefly exposed to mechanical energy before being aged statically for a period of six weeks at different temperatures. The aging step grants a greater period of time to analyze the initial reduction and subsequent nanoparticle formation processes. During the aging period the reaction was monitored using a combination of X-ray photoelectron spectroscopy (XPS), diffuse reflectance spectroscopy (DRS), powder X-ray diffraction (PXRD) and transmission electron microscopy (TEM) to gain meaningful insights into the solid-state formation of gold nanoparticles.


In situ
Variable temperature
Growth mechanism

Supplementary materials

Supporting Information In situ Study of Au Nanoparticle Growth in a Mechanochemical-Aging-Based Synthesis
1) Analytical Methods 2) Results and Discussion a. Visual inspection b. X-ray photoelectron spectroscopy c. Diffuse reflectance spectroscopy d. Powder X-ray diffraction e. Transmission electron microscopy f. Activation energy of gold nanoparticle growth


Comments are not moderated before they are posted, but they can be removed by the site moderators if they are found to be in contravention of our Commenting Policy [opens in a new tab] - please read this policy before you post. Comments should be used for scholarly discussion of the content in question. You can find more information about how to use the commenting feature here [opens in a new tab] .
This site is protected by reCAPTCHA and the Google Privacy Policy [opens in a new tab] and Terms of Service [opens in a new tab] apply.