Identification of Cell Status via Simultaneous Multitarget Imaging Using Programmable Scanning Electrochemical...

Area of Science:

• Electrochemistry
• Analytical Chemistry
• Biophysical Chemistry

Background:

• Scanning electrochemical microscopy (SECM) is a powerful technique for electrochemical imaging.
• Traditional SECM can be limited by signal-to-noise ratio and time-consuming multi-target analysis.
• Accurate assessment of cellular status requires simultaneous monitoring of multiple parameters.

Purpose of the Study:

• To develop a programmable SECM (P-SECM) technique for enhanced electrochemical imaging.
• To improve signal-to-noise ratio and enable simultaneous multitarget analysis.
• To accurately assess PC12 cell status by imaging multiple molecular targets.

Main Methods:

• A programmable multitarget-response electrochemical imaging technique was developed using SECM.
• A self-designed potential waveform was applied to the SECM tip to reduce charging current.
• The P-SECM method was validated by scanning a metal strip and imaging PC12 cells.

Main Results:

• The P-SECM technique demonstrated enhanced signal-to-noise ratio.
• Simultaneous imaging of FcMeOH, Ru(NH3)63+, and oxygen was achieved in a single scan.
• FcMeOH imaging corrected for cell height variations, Ru(NH3)63+ imaging revealed membrane permeability changes, and oxygen imaging indicated cell respiration.
• Accurate determination of PC12 cell status was achieved by combining data from the three molecular targets.

Conclusions:

• The developed P-SECM technique offers a significant advancement in electrochemical imaging.
• This method allows for accurate and efficient assessment of cellular status by simultaneous multitarget analysis.
• P-SECM overcomes the limitations of traditional SECM, including improved signal quality and reduced analysis time.