Biomimetic Chiral Photonic Crystals

Lv, Jiawei; Ding, D.; Yang, Xuekang; Hou, Ke; Miao, Xiang; Wang, Dawei; Kou, Baichuan; Huang, Ling; Tang, Zhiyong

doi:10.1002/anie.201903264

Cited by 134 publications

(129 citation statements)

References 41 publications

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“…used to scavenge ROS in vivo, therefore rescued the memory loss of mice with Parkinson's disease. 5) Chirality-based devices: As mentioned in Figure 2D, the layer-by-layer nanostructure of chiral NiMoO 4 •xH 2 O photonic crystals reported by Tang and co-workers [37] exhibited extremely large chiroptical activity (g max ≈ −1.6) with tunable features providing possibilities for chirality-based multifunctional devices with favorable optical, electrical, and magnetic properties.…”

Section: Applications and Perspectivesmentioning

confidence: 92%

Chiral Transition Metal Oxides: Synthesis, Chiral Origins, and Perspectives

Wang

Miao³

et al. 2020

Advanced Materials

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to inorganic nanocrystals (NCs) whose unique physicochemical properties could be easily tuned by altering their size, shape, or ingredient, providing a powerful platform for exploring enhanced chiroptical effects, chirogenesis, and potentials in which chiral inorganic NCs could provide to interdisciplinary fields such as optical and biosensing, [2,3] chiral bioimaging, [4] and polarization-based display devices. [5] In general, chirality in inorganic NCs can be obtained from: [6,7] 1) intrinsic chirality formed by chiral crystals, lattice distortions, and defects, [8-10] 2) chiral shape with subwavelength dimensions, [11] 3) chirality transfer via chiral assembled nanostructures of achiral NCs, [5,12] and 4) chiral interactions of achiral NCs with chiral molecules [13] as depicted in Figure 1. The most famous property of chiral nanostructure is the optical activity which refers to the ability of a chiral unit to rotate the plane of plane polarized light. [14] In modern optics, this property is associated to the circular dichroism (CD) phenomenon, which concerns the absorption difference between left and right circularly polarized (LCP and RCP) light, therefore CD-based spectroscopies are generally regarded as powerful tools to detect chirality of a measured sample. With rapid development, a number of cutting-edge work concerning on chiral metal nanoparticles (NPs), chiral semiconductor NCs, chiral ceramics, and metal coordinate systems has been investigated recently. [6] Among them, chiral transition metal oxides (TMOs) are a newly discovered area attracting tremendous attentions because of their striking feature for nonstoichiometry even though great challenges on establishing systematic control over the synthesis and theoretical supports for chirality induction mechanisms still remain. Since the nature of metal-oxygen bonding in TMOs can vary from nearly ionic to covalent or metallic, the physicochemical properties of TMOs are strongly related to their outer d electrons. [15] When combined with chiral molecules, the overlap of the orbital of chiral molecules with the density of states of TMOs or formation of chiral surfaces can bring in tunable chirality for TMOs from UV-visible to near infrared region, endowing fascinating chiroptical properties. Therefore, herein, we emphasize recent progress on chiral TMOs in terms of their synthesis, CD effects, and possible mechanisms of induced optical chirality. In Section 2, theoretical background on the origin of induced chirality in TMOs nanostructures is briefly introduced. Section 3 will show recent progress of chiral TMOs with their synthetic Transition metal oxides (TMOs) consist of a series of solid materials, exhibiting a wide variety of structures with tunability and versatile physicochemical properties. Such a statement is undeniably true for chiral TMOs since the introduction of chirality brings in not only active optical activities but also geometrical anisotropy due to the symmetry-breaking effect. Although progressive investigations have been made for accu...

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Section: Applications and Perspectivesmentioning

confidence: 92%

Chiral Transition Metal Oxides: Synthesis, Chiral Origins, and Perspectives

Wang

Miao³

et al. 2020

Advanced Materials

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“…Circular dichroism (CD) spectra of ZAS(180, 4.34)-T were measured and corrected to eliminate linear dichroism contributions using the reported protocol ( Figure S10). [24] Noteworthy are their exclusive negative CD signals with the wavelengths superimposed on the corresponding reflection bands (Figure 4 D, E). We also notice that the negative CD signals with the wavelengths coincided with corresponding reflection bands are universal in ZAS(180, 3.14)-80 and ZAS(239, 4.42)-80 ( Figure S11).…”

Section: Methodsmentioning

confidence: 99%

Endowing Zeolite LTA Superballs with the Ability to Manipulate Light in Multiple Ways

Tao

et al. 2020

Angew Chem Int Ed

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Advances in zeolites research emerging from interdisciplinary efforts have opened new opportunities beyond conventional applications. Colloids drive much current research owing to their distinct collective behaviors, but so far, using zeolites as a colloidal building block to construct ordered superstructures remains unexplored. Herein we show that selfassembly of colloidal zeolite LTA superball (ZAS) by tiltedangle sedimentation forms macroscopic films with micromesoporosity and 3D long-range periodicity featuring a photonic band gap (PBG) that is tunable through the superball geometry and responds reversibly to chemical vapors. Remarkably, self-assembly of ZAS at elevated temperature forms 3D chiral photonic crystals that enable negative circular dichroism, selective reflection of right-handed circularly polarized (CP) light and left-handed CP luminescence based on PBG. We present a novel class of functional colloids and zeolite-based photonic crystals with the ability to manipulate light in several ways.

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“…Tang and co-workers reported that acombination of selfassembly of NiMoO 4 •x H 2 Onanowires at the air-water interface and sequential deposition of their monolayers onto asolid surface resulted in formation of chiral photonic crystals (Figure 16), [88] which cannot be obtained by simple selfassembly at equilibrium. Assembled monolayers of colloidal NiMoO 4 •x H 2 On anowires were transferred onto as olid surface by Langmuir-Schaefer technique with intentional variation of the angle between the substrate and alignment direction of the nanowires.R epeating transfer with programmed variation of the relative deposition angle yielded ah ierarchical assembled structure with "twisted" layers.B y varying programmed structural designs,chiroptical responses from the resulting hierarchical structures could be easily tuned.…”

Section: Langmuir-blodgett Methodsmentioning

confidence: 99%

“…Tang and co‐workers reported that a combination of self‐assembly of NiMoO 4 ⋅ x H 2 O nanowires at the air–water interface and sequential deposition of their monolayers onto a solid surface resulted in formation of chiral photonic crystals (Figure ), which cannot be obtained by simple self‐assembly at equilibrium. Assembled monolayers of colloidal NiMoO 4 ⋅ x H 2 O nanowires were transferred onto a solid surface by Langmuir‐Schaefer technique with intentional variation of the angle between the substrate and alignment direction of the nanowires.…”

Section: Dynamic Assembly Involving Non‐equilibrium Processesmentioning

confidence: 99%

Nanoarchitectonics beyond Self‐Assembly: Challenges to Create Bio‐Like Hierarchic Organization

et al. 2020

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Incorporation of non‐equilibrium actions in the sequence of self‐assembly processes would be an effective means to establish bio‐like high functionality hierarchical assemblies. As a novel methodology beyond self‐assembly, nanoarchitectonics, which has as its aim the fabrication of functional materials systems from nanoscopic units through the methodological fusion of nanotechnology with other scientific disciplines including organic synthesis, supramolecular chemistry, microfabrication, and bio‐process, has been applied to this strategy. The application of non‐equilibrium factors to conventional self‐assembly processes is discussed on the basis of examples of directed assembly, Langmuir–Blodgett assembly, and layer‐by‐layer assembly. In particular, examples of the fabrication of hierarchical functional structures using bio‐active components such as proteins or by the combination of bio‐components and two‐dimensional nanomaterials, are described. Methodologies described in this review article highlight possible approaches using the nanoarchitectonics concept beyond self‐assembly for creation of bio‐like higher functionalities and hierarchical structural organization.

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Biomimetic Chiral Photonic Crystals

Cited by 134 publications

References 41 publications

Chiral Transition Metal Oxides: Synthesis, Chiral Origins, and Perspectives

Chiral Transition Metal Oxides: Synthesis, Chiral Origins, and Perspectives

Endowing Zeolite LTA Superballs with the Ability to Manipulate Light in Multiple Ways

Nanoarchitectonics beyond Self‐Assembly: Challenges to Create Bio‐Like Hierarchic Organization

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