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Related Experiment Videos

Tuning crystallization pathways through sequence engineering of biomimetic polymers.

Xiang Ma1, Shuai Zhang1, Fang Jiao1,2

  • 1Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, USA.

Nature Materials
|April 18, 2017
PubMed
Summary

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Crystallization pathways depend on polymer sequence. Adding a hydrophobic region shifts direct crystallization to a two-step process involving disordered clusters, impacting self-assembling polymer design.

Area of Science:

  • Polymer Science
  • Materials Science
  • Physical Chemistry

Background:

  • Two-step nucleation pathways, involving disordered states before crystallization, are known but poorly understood.
  • It is unclear if these pathways are universal or depend on specific material structures.

Purpose of the Study:

  • To investigate the dynamics of two-step nucleation pathways in crystallizing systems.
  • To determine if crystallization pathways are sequence-dependent in polymers.

Main Methods:

  • Direct observation of polymer crystallization using atomic force microscopy.
  • Analysis of crystallization kinetics and structural evolution.

Main Results:

  • Polymer crystallization pathways are sequence-dependent.

Related Experiment Videos

  • Introducing a hydrophobic region to a polymer sequence initiated a two-step nucleation pathway.
  • This pathway involved disordered molecular clusters transforming into crystalline structures, exhibiting non-linear kinetics.

    • Conclusions:

    • Findings reveal sequence-specific control over crystallization mechanisms in polymers.
    • The study provides new insights into non-classical crystallization and self-assembly.
    • Results have implications for designing advanced self-assembling polymer systems.