Dr. Paige Hall
College of Arts & Sciences
In this study, we use cyclic voltammetry to measure how nanoparticles would affect the redox potential of various electron transfer mediators (ETMs). The main class of ETMs tested was quinones, and the working electrode was decorated with gold nanoparticles. ETMs are major players in regulating redox processes in aquatic environments, and contamination of these aquatic systems with nanoparticles could drastically change these redox processes. To see if there is a difference in redox potential, we compared redox potentials between bare glassy carbon electrode, indium tin oxide (ITO) electrodes with a polycyclic aromatic hydrocarbon (PAH) layer, which was used to attach nanoparticles, and indium tin oxide electrodes with both PAH and gold nanoparticles. We find that on bare glassy carbon electrode, the redox potential was -0.005 V, ITO electrode with PAH surface had a redox potential of -0.004 V and an ITO electrode with PAH and gold nanoparticles had a redox potential of -0.067 V. As each layer is added, electrocatalysis increases and redox processes become more reversible, showing that gold nanoparticles have an electrocatalytic effect on ETMs.
Semiconductor nanoparticles; Nanoparticle dynamics; Voltammetry; Oxidation-reduction reaction; Charge exchange
Citation: Pilot Scholars Version (Modified MLA Style)
Tran, Brandon, "Redox Properties of Silver Nanoparticles" (2019). Chemistry Undergraduate Publications, Presentations and Projects. 5.