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Related Experiment Video

Updated: Oct 24, 2025

Capillary-based Centrifugal Microfluidic Device for Size-controllable Formation of Monodisperse Microdroplets
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A microfluidic device for TEM sample preparation.

Janosch Hauser1, Gustaf Kylberg2, Mathieu Colomb-Delsuc2

  • 1Division of Micro and Nanosystems, KTH Royal Institute of Technology, 10044 Stockholm, Sweden. roxhed@kth.se.

Lab on a Chip
|October 9, 2020
PubMed
Summary
This summary is machine-generated.

This study introduces a microfluidic device for rapid transmission electron microscopy (TEM) sample preparation. This automated method ensures consistent, high-quality TEM grids for viral particle and protein complex analysis.

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Area of Science:

  • Biophysics
  • Microfluidics
  • Electron Microscopy

Background:

  • Transmission electron microscopy (TEM) is crucial for visualizing viral particles and developing vaccines and biopharmaceuticals.
  • Manual TEM sample preparation is operator-dependent, leading to inconsistent and unreliable results.

Purpose of the Study:

  • To develop a microfluidic device for automated and consistent TEM sample preparation.
  • To reduce operator dependency and improve the reliability of TEM sample preparation.

Main Methods:

  • A capillary-driven, single-use microfluidic device was designed for automated TEM grid preparation.
  • The device was tested using Adeno-associated virus (AAV) particles and NanoVan® stain.
  • The device's versatility was demonstrated with two different protein complexes and stain types.

Main Results:

  • The microfluidic device prepares TEM grids with minimal user interaction in approximately one minute.
  • Consistent sample preparation quality was achieved, suitable for automated image analysis.
  • The device successfully prepared diverse biological samples, including viral particles and protein complexes.

Conclusions:

  • The microfluidic device offers a reliable and consistent alternative to manual TEM sample preparation.
  • This technology can democratize TEM sample preparation, enabling non-specialists to achieve high-quality results.
  • The automated approach addresses human inconsistency, paving the way for more efficient biopharmaceutical development.