Electrochemistry in nanoscopic volumes.

Area of Science:

• Electrochemistry
• Nanotechnology
• Bioanalytical Chemistry

Background:

• Electrochemical property exploration in ultrasmall volumes is an emerging field with fundamental and practical importance in bioanalysis and medicine.
• Microelectrodes offer suitable tools for confined geometry investigations, with significant progress in preparation and theory.
• Challenges remain in nanoscopic electrochemical studies due to unpredictable conditions and nanoscale micromanipulation difficulties.

Purpose of the Study:

• To summarize strategies for electrochemical studies in ultrasmall volumes.
• To review recent advances in the field.
• To introduce novel on-chip ultrasmall electrochemical cells based on micro- and nanogap electrodes.

Main Methods:

• Photolithographic preparation of micro- and nanogap electrodes.
• Design and fabrication of on-chip ultrasmall electrochemical cells.
• Characterization of electrochemical properties in femtolitre to attolitre volumes.

Main Results:

• Development of on-chip ultrasmall electrochemical cells with volumes from femtolitre to attolitre.
• Demonstration of the application of these cells in nanoscale electrochemical studies.
• Identification of current system limitations and future research directions.

Conclusions:

• On-chip ultrasmall electrochemical cells offer a promising platform for advancing research in confined electrochemical systems.
• Continued development in this area holds potential for significant breakthroughs in bioanalysis and medicine.
• Addressing current limitations will pave the way for future perspectives in nanoscale electrochemical investigations.