Interface Engineering of 3D‐Printed Liquid Crystal and 2D‐White Pearl Composite for Tunable Fluorescence

The ability to tune fluorescence in polymer composites via 2D materials, dyes, or interfacial modifications provides a versatile platform for advancing optoelectronics as the underlying mechanisms offer control over emission properties, leading to innovative materials. In this work, 2D‐white pearl (2D‐WP) has been synthesized from naturally occurring WP. Liquid crystal polymer (LCP) composites based on liquid crystal (LC) monomer mixture E7 have been produced via 3D printing. 2D‐WP has been dispersed in the LCP composite to demonstrate LC–2D interaction and generation of fluorescence. It has been shown that by introducing interfaces, a secondary emission can be obtained from 2D‐dispersed LCP composites. The interactions between the four monomers in E7 and 2D‐WP have been simulated, depicting a reduction in the original bandgap of 4.31 eV for 2D‐WP to 2.5 eV for LCP‐2D composite. In this way, 3D‐printed LCP in combination with 2D‐WP is shown to be an exciting prospect in further optical and photonics studies.