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Updated: May 12, 2026
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All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics
Published on: January 19, 2018
Orbital-selective single molecule reactions on a metal surface studied using low-temperature scanning tunneling
Satoshi Katano1, Yousoo Kim, Michael Trenary
1Research Institute of Electrical Communication, Tohoku University, Sendai 980-8577, Japan. skatano@riec.tohoku.ac.jp
Chemical Communications (Cambridge, England)
|April 16, 2013
Summary
Scanning tunneling microscopy (STM) reveals that injecting electrons into acetonitrile molecules on a platinum surface triggers single-molecule reactions. Resonant electron tunneling into molecular orbitals causes acetonitrile desorption and decomposition.
Area of Science:
- Surface science
- Chemical physics
- Nanotechnology
Background:
- Acetonitrile (CH3CN) adsorption on metal surfaces is crucial for catalysis.
- Understanding single-molecule reactions is key to designing new chemical processes.
- Scanning tunneling microscopy (STM) allows probing reactions at the single-molecule level.
Purpose of the Study:
- To investigate the mechanism of single-molecule reactions induced by electron injection.
- To determine the role of resonant electron tunneling in acetonitrile reactions on Pt(111).
Main Methods:
- Utilizing a scanning tunneling microscope (STM) to inject electrons into adsorbed acetonitrile molecules.
- Analyzing the voltage dependence of induced reactions.
Main Results:
- Electron injection from the STM tip induces single-molecule reactions of acetonitrile on Pt(111).
- Voltage-dependent studies show resonant tunneling into antibonding molecular orbitals is responsible.
- These resonant tunneling events lead to both desorption and decomposition of acetonitrile.
Conclusions:
- Resonant electron tunneling is a key mechanism for inducing chemical transformations at the single-molecule level.
- This study provides insights into electron-driven surface chemistry and reaction pathways.
- The findings have implications for nanoscale reaction control and surface modification.
