In-situ SEM microchip setup for electrochemical experiments with water based solutions.

Area of Science:

• Electrochemistry
• Materials Science
• Microscopy

Background:

• Optical microscopy has limitations in resolving nanoscale electrochemical processes in real-time.
• Electron microscopy offers higher resolution but typically requires vacuum conditions, posing challenges for liquid samples.

Purpose of the Study:

• To develop and demonstrate a novel system for in-situ electrochemical studies within a scanning electron microscope.
• To enable high-resolution, real-time imaging of electrochemical reactions in liquid environments.

Main Methods:

• Development of a vacuum-sealed liquid sample electrochemical cell (EC-SEM Cell) with electron-transparent windows and integrated microelectrodes.
• Utilizing a microfabricated chip with a thin silicon nitride window and platinum microelectrodes.
• Characterization of electron beam current deposition and performance in in-situ electrochemical experiments.

Main Results:

• The EC-SEM Cell successfully enabled in-situ electrochemical experiments in a scanning electron microscope.
• Demonstrated electron beam-induced electroless nickel deposition on the cell window.
• Showcased electrolysis induced by the integrated microelectrodes within the EC-SEM Cell.

Conclusions:

• The developed EC-SEM Cell is robust for extended in-situ electrochemical experiments.
• This system provides a powerful platform for high-resolution, real-time investigation of nanoscale electrochemical phenomena in liquids.
• The findings open new avenues for understanding complex electrochemical reactions at the nanoscale.