Probing Biointerfaces with QCM‑D and Electrochemistry: Opportunities and Challenges toward Integrated EQCM‑D...

Area of Science:

• Biotechnology
• Materials Science
• Analytical Chemistry

Background:

• Biosensing is crucial for early disease diagnosis, requiring analysis of complex biointerfacial dynamics.
• Quartz crystal microbalance with dissipation monitoring (QCM-D) and electrochemical methods offer complementary but limited insights into interfacial properties.
• Simultaneous measurement of gravimetric, viscoelastic, and electrochemical data is needed for comprehensive biointerfacial analysis.

Purpose of the Study:

• To review recent advancements in QCM-D and electrochemistry-based biosensing.
• To discuss strategies for coupling QCM-D and electrochemical techniques, focusing on EQCM-D.
• To highlight challenges and future directions in multimodal biosensing.

Main Methods:

• Review of literature on QCM-D and electrochemistry in biosensing.
• Focus on the principles and applications of electrochemical quartz crystal microbalance with dissipation monitoring (EQCM-D).
• Discussion of data interpretation challenges and multimodal approaches.

Main Results:

• EQCM-D enables simultaneous gravimetric, viscoelastic, and electrochemical measurements at the same biointerface.
• This multimodal approach allows for real-time correlation of coupled interfacial processes.
• Emerging challenges include interpreting the roles of water and ions in biosensing data.

Conclusions:

• EQCM-D offers unique capabilities for studying dynamic biointerfacial processes.
• Correlative multimodal EQCM-D platforms are promising for quantitative biosensing and bioelectrochemical studies.
• Addressing data interpretation challenges is key for advancing the field.