Atomic force microscopy for biological imaging and mechanical testing across length scales

Area of Science:

• Biophysics
• Nanotechnology
• Cell Biology

Background:

• Atomic force microscopy (AFM) enables nanoscale visualization and manipulation of biological samples.
• AFM's key advantage is its ability to operate in physiological aqueous environments, mimicking native conditions.
• Studies can be conducted at 37°C, ideal for in situ analysis of cells and tissues.

Purpose of the Study:

• To introduce the fundamental principles of AFM for biological research.
• To highlight AFM's capabilities in assessing structural and mechanical properties of biomaterials.
• To demonstrate the integration of AFM with optical microscopy for correlative imaging.

Main Methods:

• Utilizing atomic force microscopy for high-resolution imaging of biological specimens.
• Performing quantitative assessments of nanomechanical properties.
• Integrating AFM with optical/fluorescence microscopy for simultaneous data acquisition.

Main Results:

• AFM allows detailed structural and mechanical analysis of tissues, cells, and molecules.
• Simultaneous acquisition of structural and functional data is achievable through combined AFM-optical microscopy.
• In situ studies in physiologically relevant conditions are facilitated by AFM.

Conclusions:

• AFM is a powerful tool for investigating biological samples at the nanoscale.
• The ability to study samples in aqueous environments and at physiological temperatures is a significant advantage.
• AFM offers unprecedented capabilities for correlating structural and functional information in biological systems.