Revealing DNA Structure at Liquid/Solid Interfaces by AFM-Based High-Resolution Imaging and Molecular Spectroscopy

Area of Science:

• Molecular Biology
• Nanotechnology
• Biophysics

Background:

• DNA integrity is crucial for all living organisms.
• Understanding DNA structural modifications is vital for medicine and pharmacology.
• External factors can impact DNA structure and integrity.

Purpose of the Study:

• To review recent advancements in nanoscale DNA structure research.
• To highlight the role of Scanning Probe Microscopy (SPM) techniques, particularly Atomic Force Microscopy (AFM).
• To discuss the integration of spectroscopy for comprehensive DNA analysis.

Main Methods:

• High-resolution Atomic Force Microscopy (AFM) for visualizing DNA structure at liquid/solid interfaces.
• Description of AFM modes enabling visualization in native liquid environments.
• Summary of molecular spectroscopy techniques, including Tip-Enhanced Raman Spectroscopy (TERS), for chemical analysis.

Main Results:

• AFM provides well-resolved nanoscale structural information of DNA.
• AFM allows visualization of DNA in native, liquid environments.
• TERS offers complementary chemical structure and composition data.

Conclusions:

• Combining AFM and TERS provides a comprehensive understanding of DNA structure and rearrangements.
• Advancements in SPM techniques drive detailed nanoscale DNA structural studies.
• This integrated approach is crucial for future medical and pharmacological developments.