Mechanical and Aerospace Engineering Colloquium

September 11, 2019
September 11, 2019
 
Speaker: Michael V. Mirkin, PhD
                Queens College, City University of New York     
Title: Electrochemical Imaging and Reactivity Mapping on the Nanoscale
Location: Easton Hub Auditorium
                 Fiber Optics Building
Time: 3:30 p.m. to 4:30 p.m.
 
Abstract: Probing electrocatalytic reactions at specific active sites with a nanoscale resolution is critically important because the activity of electrocatalysts depends strongly on their local atomic structures, particularly those found at defect sites, edges and corners.  Scanning electrochemical microscopy (SECM) is a versatile technique for mapping local electrocatalytic activity of heterogeneous surfaces.  SECM has long been seen as a sub-micrometer microscopy tool.  A major improvement in spatial resolution over the last few years enabled applications of this technique to nanoscale topography and reactivity imaging.  The focus of this presentation is on using generation/collection and feedback modes of SECM operation to quantify local variations in catalytic activity in several different systems, ranging from NiO nanosheets and single bimetallic nanorods to MoS2 nanoflakes and photoelectrochemical processes at TiO2 surfaces. 
 
Bio: Michael V. Mirkin is Professor of Chemistry at the City University of New York, Queens College.  His research interests include interfacial charge-transfer processes at solid/liquid and liquid/liquid interfaces, electrochemical kinetics and catalysis, nanoelectrochemistry, and bioelectrochemistry.  He has been involved in theoretical and experimental development of scanning electrochemical microscopy (SECM) and other nanoelectrochemical techniques, and co-edited the first monograph on SECM (second edition, 2012) and a monograph on nanoelectrochemistry (2015).