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<p>From a molecular perspective, chirality is manifested in the intrinsic asymmetry of atomic arrangements that cannot be superimposed on their mirror images. Achiral molecules at nanometer scale can be assembled to have micron-scale chiral structures using physical stimuli, but the resulting chiral structures are often spatially limited, difficult to control over large areas, or unstable once the stimulus is removed. Here we show that a confined anisotropic molecular medium, derived from the nematic mesophase, undergoes a field-driven symmetry-breaking transition that generates micron-scale chiral structures. This approach provides a simple and scalable route to generate macroscopic chiral optical materials from molecularly symmetric precursors.</p>

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Microchiral pinwheel arrays based on achiral molecules

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年8月5日

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  • Jeong Yeon Han,
  • Won Kyung Park,
  • Byeongil Noh,
  • Fumito Araoka,
  • Sungwook Jeong,
  • Byung Hak Jhun,
  • Youngmin You,
  • Yoonsu Park,
  • Kyung Jin Lee,
  • Jung-Moo Heo,
  • Dong Ki Yoon

摘要

From a molecular perspective, chirality is manifested in the intrinsic asymmetry of atomic arrangements that cannot be superimposed on their mirror images. Achiral molecules at nanometer scale can be assembled to have micron-scale chiral structures using physical stimuli, but the resulting chiral structures are often spatially limited, difficult to control over large areas, or unstable once the stimulus is removed. Here we show that a confined anisotropic molecular medium, derived from the nematic mesophase, undergoes a field-driven symmetry-breaking transition that generates micron-scale chiral structures. This approach provides a simple and scalable route to generate macroscopic chiral optical materials from molecularly symmetric precursors.