Related Experiment Video
Updated: Feb 12, 2026

Near Simultaneous Laser Scanning Confocal and Atomic Force Microscopy Conpokal on Live Cells
Published on: August 11, 2020
Nanoscale mapping of catalytic hotspots on Fe, N-modified HOPG by scanning electrochemical microscopy-atomic force
Srikanth Kolagatla1, Palaniappan Subramanian, Alex Schechter
1Department of Chemical Sciences, Ariel University, Ariel 40700, Israel. salex@ariel.ac.il.
Abstract:
The scanning electrochemical microscopy-atomic force microscopy (SECM-AFM) technique is used to map catalytic currents post Fe and N surface modification of graphitic carbon with an ultra-high resolution of 50 nm. The oxidation current of the partial reduction product, hydrogen peroxide, was also mapped in the same location in the graphitic carbon. The current mapping and ex situ spectroscopic evidence revealed that Fe-coordinated nitrogen sites formed both in the edge and basal planes of highly ordered pyrolytic graphite (HOPG) constitute the primary oxygen reduction catalytic sites in acid solutions of this important yet insufficiently understood class of catalysts.
Related Concept Videos
Atomic Force Microscopy
The AFM Probe
The probe is regarded as the heart of any AFM setup and comprises the...
Scanning Electron Microscopy
Fundamental Principles
Accelerated...
What is an Electrochemical Gradient?
The chemical gradient relies on differences in the abundance of a substance on the outside versus the inside of a cell and flows from areas of high to low ion concentration. In contrast, the electrical gradient revolves around an...
Immunofluorescence Microscopy
Atomic Orbitals
Intermolecular Forces

