Colorful blue phase liquid crystal (BPLC) patterns have attracted wide research attention owing to their intriguing and advantageous properties and promising applications. However, it remains a challenge to develop novel and high-resolution patterns from BPLC owing to the complicated synthetic procedure for the functional molecules. This study reports a high-resolution “live” pattern by well-designed diffusion of 5CB ink on the wettability-modified BPLC networks. Interestingly, the shape and color of the as-prepared pattern change with time, which results in unique spectra change of the printed pattern, “first red-shift and subsequent blue-shift of the stopband position” and “continuous growth in reflectivity intensity” with time. The hydrophobic substrate greatly suppresses the random spreading and diffusion of ink, contributing to high-resolution patterns. The promising applications of live patterns for program display and active labels are demonstrated. Various high-resolution erasable colorful patterns are obtained. The structure reconfiguration of the writing and erasing processes is proved by transmitted electronic microscope images and Kossel diffraction diagrams, which ensures the reversible writing/erasing of the pattern on the membrane. This work is of significance for the development of novel rewritable paper and high-quality optic devices based on BPLC materials.

中文翻译：

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基于可控墨水扩散的高分辨率可擦除“实时”图案在 3D 蓝相液晶网络上

彩色蓝相液晶 (BPLC) 图案由于其有趣和有利的特性和广阔的应用前景而引起了广泛的研究关注。然而，由于功能分子的复杂合成过程，从 BPLC 开发新颖的高分辨率模式仍然是一个挑战。本研究通过精心设计的 5CB 墨水在润湿性改性 BPLC 网络上的扩散报告了高分辨率“实时”模式。有趣的是，所制备图案的形状和颜色随时间变化，导致印刷图案的光谱发生独特变化，“阻带位置先红移后蓝移”和“反射率强度持续增长”随着时间的推移。疏水性基材极大地抑制了墨水的随机扩散和扩散，有助于高分辨率模式。演示了用于节目显示和活动标签的实时模式的有前途的应用。得到各种高分辨率的可擦彩色图案。通过透射电子显微镜图像和科塞尔衍射图证明了写入和擦除过程的结构重构，确保了膜上图案的可逆写入/擦除。该工作对于开发新型可重写纸和基于BPLC材料的高质量光学器件具有重要意义。通过透射电子显微镜图像和科塞尔衍射图证明了写入和擦除过程的结构重构，确保了膜上图案的可逆写入/擦除。该工作对于开发新型可重写纸和基于BPLC材料的高质量光学器件具有重要意义。通过透射电子显微镜图像和科塞尔衍射图证明了写入和擦除过程的结构重构，确保了膜上图案的可逆写入/擦除。该工作对于开发新型可重写纸和基于BPLC材料的高质量光学器件具有重要意义。