Application of Electron Microscopes in Nanotoxicity Assessment

Area of Science:

• Nanotoxicology
• Microscopy
• Materials Science

Background:

• Electron microscopes (EMs) are essential tools in nanotoxicity assessment.
• Understanding nanomaterial (NM) interactions with biological systems requires detailed ultrastructural analysis.

Purpose of the Study:

• To highlight the applications of EMs in nanotoxicity assessment.
• To provide guidance on tissue sample preparation for EM analysis.
• To discuss various EM techniques used by nanotoxicologists.

Main Methods:

• Utilizing conventional electron microscopy (EM).
• Combining EMs with analytical techniques like electron energy loss spectroscopy (EELS) and energy dispersive X-ray spectroscopy (EDS/EDX).
• Employing transmission electron microscopy (TEM)-assisted scanning transmission X-ray microscopy (STXM) for advanced characterization.

Main Results:

• EMs provide high-resolution data on NM size, morphology, and cellular localization.
• Analysis reveals nano-bio interactions and NM-induced ultrastructural changes.
• Elemental and chemical characterization is enhanced through coupled analytical techniques.

Conclusions:

• Electron microscopy is indispensable for comprehensive nanotoxicity evaluation.
• Integrated analytical techniques significantly expand the scope of EM in nanotoxicology.
• This chapter serves as a practical guide for researchers in the field.