Blue phase liquid crystal microcapsules: confined 3D structure inducing fascinating properties
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© 2019 The Royal Society of Chemistry. Blue phase liquid crystals (BPLCs) self-assembling into soft cubic crystalline structures possess significant applications in the field of dynamic photoelectron spectroscopy. However, three scientific challenges limit their broader application, namely, the difficulty to form a free-standing structure due to fluidity, dependence on nanoparticles or polymer matrix to widen the BP temperature range, and high working voltages to reorientate the LCMs. Herein, we proposed a new concept of free-standing BPLC microcapsules (BPLCMs) prepared by microfluidic emulsification and interfacial polymerization. The temperature range of BPLCs could be widened by surface anchoring and physical confinement. The BPLCMs built a color library in the visible region in the thermal response process. Most importantly, the stable BPLCMs exhibited a reversible surface-switch mode driven by an electric field lower than 0.55 V μm-1, which was the lowest record for BPLCs. The BPLCMs demonstrate intriguing prospects in the fields of smart display and reversible sensors.
author list (cited authors)
Lin, P., Wei, Z., Yan, Q. i., Chen, Y., Wu, M., Xie, J., ... Cheng, Z.