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A sub-ms pressure jump setup for time-resolved X-ray scattering.

Johannes Möller1, Joachim Léonardon1, Jacques Gorini1

  • 1ESRF - The European Synchrotron, 38043 Grenoble, France.

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|January 3, 2017
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Summary
This summary is machine-generated.

A novel experimental setup enables rapid sub-millisecond hydrostatic pressure jumps for time-resolved solution small-angle X-ray scattering (SAXS) studies. This advancement allows for faster kinetic process investigations and p-T phase diagram mapping.

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Area of Science:

  • Biophysics
  • Materials Science
  • Chemical Physics

Background:

  • Kinetic processes in solution are often studied using time-resolved techniques.
  • Hydrostatic pressure jumps are a powerful method to induce rapid changes in molecular conformation and interactions.
  • Existing pressure-jump methods for small-angle X-ray scattering (SAXS) lack the speed required to capture very fast kinetic events.

Purpose of the Study:

  • To develop and present a new experimental setup for time-resolved solution small-angle X-ray scattering (SAXS) studies.
  • To achieve sub-millisecond hydrostatic pressure jumps for investigating rapid kinetic processes.
  • To enable the mapping of pressure-temperature (p-T) phase diagrams.

Main Methods:

  • A high-force piezo-stack actuator was employed to dynamically compress the sample volume.
  • The setup was optimized for SAXS experiments using transparent diamond windows and a sample capillary.
  • Absolute pressures up to 1000 bars can be achieved with pressure changes occurring in less than 1 ms.

Main Results:

  • The developed setup achieves pressure jumps significantly faster (approximately one order of magnitude) than previous dynamic pressure setups for SAXS.
  • Technical specifications of the new setup are presented.
  • Initial experimental data demonstrating the capabilities of the setup are shown.

Conclusions:

  • The new experimental setup significantly advances the field of time-resolved SAXS by enabling unprecedented temporal resolution for pressure-induced kinetic studies.
  • This technology opens new avenues for exploring fast molecular dynamics and phase transitions under pressure.
  • The integrated temperature control facilitates automated p-T phase diagram mapping, providing a comprehensive understanding of material behavior.