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Mixing and jetting analysis using continuous flow microfluidic sample delivery devices.

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Summary
This summary is machine-generated.

Researchers developed novel microfluidic devices for serial femtosecond crystallography (SFX) at X-ray free electron lasers (XFELs). These devices enable precise sample delivery and rapid mixing for probing molecular dynamics on sub-microsecond timescales.

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Area of Science:

  • Structural Biology
  • Biophysics
  • Materials Science

Background:

  • Serial femtosecond crystallography (SFX) at X-ray free electron lasers (XFELs) requires advanced sample delivery techniques.
  • Microfluidic devices offer precise control for sample delivery and rapid mixing in biological experiments.

Purpose of the Study:

  • To develop and characterize novel microfluidic mix-and-inject devices for SFX experiments.
  • To assess the performance of these devices in terms of jetting stability and mixing efficiency.

Main Methods:

  • Fabrication of microfluidic devices using high-resolution photolithography with SU8 on glass.
  • Characterization of device performance using various flow rates to monitor jetting and mixing.
  • Fluorescence experiments to confirm mixing uniformity and speed.

Main Results:

  • Successful fabrication of microfluidic mix-and-inject devices.
  • Observation of stable jet formation with different regimes (liquid column, ribbon, cylindrical jet) at various flow rates.
  • Demonstration of rapid and uniform mixing of solutions, enabling sub-microsecond timescale measurements.

Conclusions:

  • The developed microfluidic devices are suitable for precise sample delivery in SFX experiments.
  • These devices can facilitate the study of molecular dynamics on very fast timescales.
  • The fabrication process offers a new method for creating advanced microfluidic tools for structural biology.