New Frontiers in Semiconductor Electrochemistry: Materials Synthesis and Analysis of Heterogeneous Charge-Transfer Rates

Department of Chemical & Environmental Engineering Seminar Series - Fall 2018

"New Frontiers in Semiconductor Electrochemistry: Materials Synthesis and Analysis of Heterogeneous Charge-Transfer Rates"

Steve Maldonado
Associate Professor 
Department of Chemistry
University of Michigan

This talk will highlight and summarize two separate efforts in my group in the area of semiconductor electrochemistry. First, I will describe a hybrid synthetic method developed by my lab to prepare crystalline inorganic materials. Combining elements of electrodeposition and melt crystal growths, the electrochemical liquid-liquid-solid (ec-LLS) process uses electrochemistry to drive solutes of interest into liquid metals where nucleation and crystal growth can occur. I will highlight our understanding of the process and our ability to control it for materials synthesis at the nanoscale (nanowires, nanoparticles) and the macroscale (epitaxial films). Second, I will discuss a new effort in my lab to make electrochemical measurements of heterogeneous charge transfer at semiconductor/liquid interfaces. Specifically, we have identified semiconductor ultramicroelectrodes useful in this regard. This talk will describe their relative response characteristics and then summarize our findings to date in the context of develop- ing photoelectrochemical energy conversion/storage systems.

Wednesday, November 7, 2018 at 10:30AM
Becton Seminar Room
MC 035

Refreshments at 10:00AM