Phase contrast and DIC illumination for AFM hybrids

Area of Science:

• Biophysics
• Cell Biology
• Nanotechnology

Background:

• High-resolution optical microscopy is crucial for life science force microscopy, especially in cell biology and medicine.
• Current methods for cell identification and validation (e.g., phase contrast, DIC microscopy) are often separate from atomic force microscopy (AFM) measurements.
• Online monitoring of individual cells during AFM is highly beneficial for accurate analysis.

Purpose of the Study:

• To integrate high-resolution optical microscopy techniques directly into an atomic force microscopy (AFM) head.
• To enable simultaneous visualization and force measurements at the Abbe diffraction limit.
• To provide two distinct strategies for implementing this integrated system.

Main Methods:

• Development of two novel strategies for integrating light microscopy into an AFM head.
• Utilizing phase contrast and differential interference contrast microscopy principles.
• Achieving measurements at the Abbe diffraction limit resolution.

Main Results:

• Successful implementation of two different strategies for integrated optical and AFM measurements.
• Demonstration of high-resolution imaging capabilities within the AFM head.
• Validation of the system's potential for online cell selection and monitoring during AFM experiments.

Conclusions:

• The developed integrated system offers significant advantages for life science force microscopy.
• Enables precise cell identification and monitoring during AFM, crucial for cell biology and medical research.
• Represents a technological advancement for high-resolution nanoscale investigations.