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Field emission scanning electron microscopy (FE-SEM) as an approach for nanoparticle detection inside cells
M Havrdova1, K Polakova1, J Skopalik2
1Regional Centre of Advanced Technologies and Materials, Department of Experimental Physics and Physical Chemistry, Faculty of Science, Palacky University, 17 listopadu 12, 771 46 Olomouc, Czech Republic.
Micron (Oxford, England : 1993)
|September 1, 2014
Summary
Field emission scanning electron microscopy (FE-SEM) with FTO glass enables nanoparticle imaging within cells without extensive sample preparation. This method offers detailed cellular analysis for biomedical applications.
Area of Science:
- Materials Science
- Cell Biology
- Nanotechnology
Background:
- Characterizing nanoparticle behavior in biological systems is crucial for bio-applications.
- Conventional methods like Transmission Electron Microscopy (TEM) and Scanning Transmission Electron Microscopy (STEM) require lengthy sample preparation.
- This limits the efficient analysis of nanoparticle-cell interactions.
Purpose of the Study:
- To introduce a novel method for imaging nanoparticles within cells using Field Emission Scanning Electron Microscopy (FE-SEM).
- To demonstrate the utility of a new matrix (FTO glass) for biological sample preparation.
- To bypass the extensive sample preparation required by traditional electron microscopy techniques.
Main Methods:
- Utilized Field Emission Scanning Electron Microscopy (FE-SEM) on biological samples mounted on FTO glass.
- Performed material contrast and energy-dispersive X-ray spectroscopy (EDS) analyses.
- Compared FE-SEM imaging with conventional TEM/STEM imaging.
Main Results:
- Acquired high-resolution nanoparticle images within endo/lysosomes using FE-SEM without disrupting cellular structure.
- Captured initial stages of nanoparticle cellular incorporation.
- Demonstrated FTO glass provides sample stability for high-voltage electron microscopy.
- Confirmed nanoparticle presence via EDS, without contrast staining or metal coating.
Conclusions:
- FE-SEM on FTO glass offers a streamlined approach for characterizing intracellular nanoparticles.
- This method facilitates detailed analysis of nanoparticle distribution and cellular morphology.
- It holds significant potential for evaluating nanoparticle biocompatibility and medical applications.
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