Time-Resolved Ex Situ Kinetics of Au Nanoparticles by Alternating Voltage-Induced Electrochemical Synthesis.

ABSTRACT: The kinetic and formation mechanism of gold nanoparticles obtained by an electrochemical method of alternating voltage and ascorbic acid as a supporting reductant is described. The reaction was monitored ex situ through UV-vis spectroscopy and high-resolution electronic microscopy. The UV-vis spectroscopy revealed an increase in the localized surface plasmon resonance at 540 nm, accompanied by a progressive decrease in the characteristic peak of ascorbic acid. Kinetic analyses derived from absorbance at 540 nm, concentration, and reaction rate indicated first-order kinetics. Additionally, morphological and size distribution monitoring by HR-TEM showed an increase in nanoparticle size from 5 to 35 nm as a function of reaction time, as well as the appearance of unusual anisotropies in

SUBMITTER: Salvador-Carlos J 

PROVIDER: S-EPMC12355278 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature