Introduction to atomic force microscopy (AFM) in biology.

Area of Science:

• Biophysics
• Nanotechnology
• Microscopy

Background:

• Atomic Force Microscopy (AFM) offers high-resolution imaging of biological samples in physiological buffer solutions.
• Unlike electron microscopy (EM), AFM allows observation of live biological specimens, preserving their native state.
• AFM provides topographical data and measures forces and mechanical properties at the nanoscale.

Purpose of the Study:

• To introduce the principles and applications of Atomic Force Microscopy (AFM) for biological systems.
• To highlight AFM's unique capabilities in imaging and analyzing proteins, cells, and tissues.
• To provide methodological insights for practical AFM use in biological research.

Main Methods:

• Utilizing Atomic Force Microscopy (AFM) for high-resolution topographical imaging.
• Measuring inter-molecular forces and nanoscale mechanical properties of biological samples.
• Conducting experiments in buffer solutions to maintain sample viability and study dynamic changes.

Main Results:

• AFM successfully imaged biological samples, including proteins, cells, and tissues, with molecular resolution.
• The technique allowed for the investigation of forces and mechanical properties at the nanoscale.
• Temporal structural changes in biological samples were observed in response to chemical stimuli.

Conclusions:

• AFM is a powerful tool for studying biological systems in a life-like environment.
• Its ability to provide high-resolution topographical and mechanical data distinguishes it from conventional imaging methods.
• AFM facilitates a deeper understanding of biological structures and functions at the molecular and cellular levels.