Glass nano/micron pipette-based ion current rectification sensing technology for single cell/in vivo analysis

Area of Science:

• Electrochemistry
• Nanotechnology
• Analytical Chemistry

Background:

• Glass nano/micron pipettes are valuable for sensitive electrochemical sensing of single entities due to their confined tip space and modifiable surfaces.
• Their conical tip minimizes cell damage, enabling in situ intracellular analysis.
• Limitations include poor mechanical properties, precise fabrication challenges, and susceptibility to blockage.

Purpose of the Study:

• To review the preparation and functionalization of glass nano/micron pipettes.
• To introduce sensing mechanisms of electrochemical platforms using these pipettes with ion current rectification.
• To discuss applications, challenges, and future prospects in single cell and in vivo analysis.

Main Methods:

• Summarizing preparation and functionalization techniques for glass nano/micron pipettes.
• Reviewing ion current rectification sensing mechanisms.
• Analyzing applications in single cell and in vivo analysis.

Main Results:

• Glass nano/micron pipettes enable sensitive and selective electrochemical sensing.
• Ionic current rectification technology allows analysis of non-electrochemically active substances with minimal damage.
• The review highlights applications in complex biological samples.

Conclusions:

• Glass nano/micron pipettes combined with ion current rectification offer a powerful tool for sensitive in situ cellular and in vivo analysis.
• Addressing limitations in mechanical properties and fabrication is crucial for broader applicability.
• Further research will expand their use in complex biological systems.