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Related Experiment Videos

Rapid contrast matching by microfluidic SANS.

Marco Adamo1, Andreas S Poulos, Ruhina M Miller

  • 1Department of Chemical Engineering, Imperial College London, London SW7 2AZ, UK. j.cabral@imperial.ac.uk.

Lab on a Chip
|April 6, 2017
PubMed
Summary
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This study introduces a microfluidic system for small angle neutron scattering (SANS) that continuously varies solution composition. This novel approach enhances efficiency and precision for studying soft and biological matter.

Area of Science:

  • Soft Matter Physics
  • Neutron Scattering Techniques
  • Microfluidics

Background:

  • Small angle neutron scattering (SANS) is crucial for soft and biological matter research.
  • Conventional SANS contrast variation requires sequential measurements of discrete solutions.
  • This limits efficiency and sample throughput.

Purpose of the Study:

  • To develop a microfluidic approach for continuous contrast variation in SANS.
  • To enable real-time measurements and reduce sample volume.
  • To improve the efficiency and precision of SANS experiments.

Main Methods:

  • Integration of a microfluidic mixer and serpentine channel into a SANS beamline.
  • Continuous variation of isotopic solvent composition during SANS acquisition.

Related Experiment Videos

  • Experimental and computational analysis of flow dispersion and beam overillumination effects.

    • Main Results:

    • Demonstrated continuous contrast variation with model systems (H2O/D2O, SDS, Pluronic F127, Ludox).
    • Achieved refined contrast matching by zooming into specific composition windows.
    • Successfully resolved solute structure and form factors via simultaneous data fitting.

    Conclusions:

    • The microfluidic SANS approach offers significant advantages over discrete methods.
    • It requires less sample volume and reduces preparation and measurement time.
    • Represents a significant advancement for equilibrium liquid solution phase mapping and contrast variation by SANS.