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Structured ternary fluids as nanocrystal incubators for enhanced crystallization control.

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Structured ternary fluids (STFs) enable enhanced control over crystallization by acting as nanocrystal incubators. This allows for the production and stabilization of difficult-to-crystallize polymorphs for improved polymorph discovery and seeding strategies.

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Area of Science:

  • Materials Science
  • Chemical Engineering
  • Crystallography

Background:

  • Nucleation is typically the rate-limiting step in solution crystallization, hindering investigation of nm-sized crystals.
  • Limited crystal lifespan in conventional methods impedes manipulation and study.

Purpose of the Study:

  • To investigate crystallization in structured ternary fluids (STFs) for enhanced control and nanocrystal stabilization.
  • To explore the potential of STFs for polymorph discovery and seeding.

Main Methods:

  • Crystallization experiments conducted in structured ternary fluids (STFs) with restricted diffusion.
  • Utilized octanol/ethanol/water STF to crystallize glycine polymorphs (α, γ, β).

Main Results:

  • STFs facilitate higher nucleation rates and slower crystal growth, enabling nanocrystals to persist.
  • Successfully crystallized all three ambient pressure polymorphs of glycine, including the challenging γ- and β-forms.
  • Demonstrated the use of STF-derived nanocrystals to seed metastable solutions.

Conclusions:

  • STFs act as effective nanocrystal incubators, offering enhanced crystallization control.
  • STFs are a versatile tool for polymorph discovery, potentially revolutionizing screening approaches.
  • STFs offer a generic methodology for producing desired crystal polymorphs and seed suspensions.