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Related Concept Videos

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Supercritical fluid chromatography (SFC) provides a beneficial substitute for gas chromatography (GC) and liquid chromatography (LC) for certain samples because it merges the top attributes of both techniques. SFC allows the separation and analysis of compounds that GC or LC does not easily manage. These compounds are traditionally nonvolatile or thermally unstable, making GC unsuitable and lacking functional groups required for HPLC analysis.
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Crystallization is a phase transformation process in which crystals are precipitated from a supersaturated solution or formed from other sources. During crystallization, atoms or molecules arrange themselves into a well-defined, rigid crystal lattice to minimize energy.
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A microfluidic platform for studying supercritical fluid crystallization and its applications.

Fatma Ercicek1,2, Arnaud Erriguible1,3, Olivier Nguyen1

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This study introduces a microfluidic device for real-time observation of supercritical antisolvent crystallization, enabling rapid crystal screening and co-crystal identification.

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Area of Science:

  • Chemical Engineering
  • Materials Science
  • Crystallization Science

Background:

  • Supercritical antisolvent (SAS) crystallization is a widely used technique for particle formation.
  • Understanding the dynamics of SAS crystallization is crucial for controlling crystal properties.
  • Current methods often lack real-time, in-situ monitoring capabilities under process conditions.

Purpose of the Study:

  • To develop and validate an on-chip microfluidic device for supercritical antisolvent crystallization.
  • To integrate in-situ analytical techniques for real-time monitoring of crystallization events.
  • To gain critical insights into the time-dependent dynamics of diffusion-driven crystallization.

Main Methods:

  • Development of an integrated microfluidic device for on-chip crystallization.
  • Utilized supercritical antisolvent (SAS) technique within the microfluidic platform.
  • Incorporated Raman spectroscopy for continuous, in-situ monitoring of species concentrations.
  • Performed real-time observation of crystallization events under pressure.

Main Results:

  • The microfluidic device enabled real-time observation of crystallization under pressure.
  • Continuous Raman monitoring allowed precise control of local species concentrations.
  • The system provided critical insights into time-dependent crystallization dynamics.
  • Demonstrated effectiveness in rapid crystal screening and identification of novel co-crystals.

Conclusions:

  • The developed microfluidic platform offers a powerful tool for studying and optimizing SAS crystallization.
  • In-situ monitoring provides unprecedented understanding of crystallization kinetics and mechanisms.
  • This approach facilitates accelerated discovery of new crystalline materials, including co-crystals.