Amplifying inorganic chirality using liquid crystals

Zhang, Mingjiang; Wang, Yaxin; Zhou, Yu; Yuan, Honghan; Guo, Qi; Zhuang, Tao

doi:10.1039/d1nr06036h

Cited by 16 publications

(11 citation statements)

References 88 publications

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“…Different from other chiral soft templates, chiral liquid-crystalline templates are known to show multitudinous advantageous attributes, such as long-range molecular ordering, structural diversity of chiral mesogenic phases, and superior responsiveness to many external stimuli, such as light, temperature, electric field, mechanical force 1,2,77,98 . Importantly, many researchers have demonstrated that using chiral liquid crystals as soft templates can effectively amplify the chirality of nanomaterials and increase the optical asymmetry [148][149][150][151] . In this section, we shall introduce recent endeavors in the development of chiral plasmonic nanomaterials with various thermotropic and lyotropic liquid crystal templates.…”

Section: Liquid Crystal-templated Chiral Plasmonic Nanomaterialsmentioning

confidence: 99%

Liquid crystal-templated chiral nanomaterials: from chiral plasmonics to circularly polarized luminescence

et al. 2022

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Chiral nanomaterials with intrinsic chirality or spatial asymmetry at the nanoscale are currently in the limelight of both fundamental research and diverse important technological applications due to their unprecedented physicochemical characteristics such as intense light-matter interactions, enhanced circular dichroism, and strong circularly polarized luminescence. Herein, we provide a comprehensive overview of the state-of-the-art advances in liquid crystal-templated chiral nanomaterials. The chiroptical properties of chiral nanomaterials are touched, and their fundamental design principles and bottom-up synthesis strategies are discussed. Different chiral functional nanomaterials based on liquid-crystalline soft templates, including chiral plasmonic nanomaterials and chiral luminescent nanomaterials, are systematically introduced, and their underlying mechanisms, properties, and potential applications are emphasized. This review concludes with a perspective on the emerging applications, challenges, and future opportunities of such fascinating chiral nanomaterials. This review can not only deepen our understanding of the fundamentals of soft-matter chirality, but also shine light on the development of advanced chiral functional nanomaterials toward their versatile applications in optics, biology, catalysis, electronics, and beyond.

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Section: Liquid Crystal-templated Chiral Plasmonic Nanomaterialsmentioning

confidence: 99%

Liquid crystal-templated chiral nanomaterials: from chiral plasmonics to circularly polarized luminescence

et al. 2022

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“…[12,[22][23][24][25][26][27] On the basis of different composition, CPL materials are generally grouped into six categories: Polymers, [28][29][30][31][32][33][34][35][36] small organic molecules, [37][38][39] supramolecular assemblies, [23,[40][41][42] liquid crystals, [43][44][45] metal complexes, [46][47][48][49][50] and inorganic materials. [51][52][53] Amongst the categories, CPL materials constructed from polymers have inherent advantages. For instance, biological polymers such as DNA, proteins, and polysaccharides featuring both inherent molecular chirality and helical chirality provide rich chiral sources and elegant architectures for constructing CPL materials.…”

Section: Polymer-based Circularly Polarized Luminescent Materialsmentioning

confidence: 99%

Polymer‐Based Circularly Polarized Luminescent Materials

Zhong

Zhao

Deng

2023

Advanced Optical Materials

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Chiral materials capable of generating circularly polarized luminescence (CPL) have gained rapidly growing research interest by virtue of their peculiar photophysical characteristics and far‐reaching applications. Amongst various CPL materials, polymer‐based CPL materials have constituted an important class owing to their abundant types, ease of manufacture, high thermal stability, as well as, tunable properties. The present work reviews the latest advances in constructing polymer‐based CPL materials, which are classified based on the interaction modes between chiral and luminescent components, that is, covalent interaction, non‐covalent interaction, as well as, without covalent and non‐covalent interactions. The newly emerging categories of polymer‐based CPL materials, that is, nonconventional fluorescence‐based CPL materials, circularly polarized room temperature phosphorescence, and polymer‐based CPL materials with thermally activated delayed fluorescence properties are also presented. Typical applications of the polymer‐based CPL emitters in organic light‐emitting diodes, information security encryption, and optical sensors are further discussed. Additionally, the current challenges and future perspectives in this field are summarized. This review article is expected to stimulate more unprecedented achievements derived from polymer‐based CPL materials, thus further promoting their future practical applications.

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“…Circularly polarized luminescence (CPL), generated by the intrinsic chirality − of luminescent materials, is a lesser-known type of emission and is not easy to replicate without advanced chiral expertise, offering promise in the application of information encryption and anticounterfeiting. , To serve the soaring needs for anticounterfeiting technology, we take a step further to incorporate more information encoding on top of CPL to achieve multilayer optical authentication, using a helical-coassembly strategy to incorporate quantum dots (QDs) and liquid crystals.…”

Section: Introductionmentioning

confidence: 99%

Multimodal-Responsive Circularly Polarized Luminescence Security Materials

et al. 2023

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Nations, industries, and aspects of everyday life have undergone forgery and counterfeiting ever since the emergence of commercialization. Securing documents and products with anticounterfeit additives shows promise for authentication, allowing one to combat ever-increasing global counterfeiting. One most-used effective encryption strategy is to combine with optical-security markers on the required protection objects; however, state-of-the-art labels still suffer from imitation due to their poor complexity and easy forecasting, as a result of deterministic production. Developing advanced anticounterfeiting tags with unusual optical characters and further incorporating complex security features are desired to achieve multimodal, unbreakable authentication capacity; unfortunately, this has not yet been achieved. Here, we prepare a series of stable circularly polarized luminescence (CPL) materials, composed of toxicity-free, high-quality-emitting inorganic quantum dots (QDs) and liquid crystals, using a designed helical-coassembly strategy. This CPL system achieves a figure of merit (FM, assessing the performance of both luminescence dissymmetry and quantum yield) value of 0.39, fulfilling practical demands for anticounterfeiting applications. Based on these CPL structures, we produce a type of multimodal-responsive security materials (MRSMs) that exhibits six different stimuli-responsive modes, including light activation, polarization, temperature, voltage, pressure, and view angle. Thus, we show a proof-of-principle blockchain-like integrated anticounterfeiting system, allowing multimodal-responsive, interactive/changeable information encryption–decryption. We further encapsulate the obtained security materials into a fiber to expand our materials to work on flexible fabrics, that is, building an intelligent textile with a color-adaptable function along with environmental change.

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Amplifying inorganic chirality using liquid crystals

Abstract: We summarize the current progress of amplifying inorganic chirality using liquid crystals. Chiral interactions between inorganic components and liquid crystals, representative applications, and the perspectives of this field are presented.

Cited by 16 publications

References 88 publications

Liquid crystal-templated chiral nanomaterials: from chiral plasmonics to circularly polarized luminescence

Liquid crystal-templated chiral nanomaterials: from chiral plasmonics to circularly polarized luminescence

Polymer‐Based Circularly Polarized Luminescent Materials

Multimodal-Responsive Circularly Polarized Luminescence Security Materials

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