ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 33
·期 26
·2214660
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IF 19
Zeng-Kui Zhu,Tingting Zhu,Jianbo Wu,Shihai You,Panpan Yu,Xitao Liu,Lina Li,Chengmin Ji,Junhua Luo
2D chiral hybrid perovskites have recently emerged as outstanding semiconductor materials. However, most of the reported 2D chiral perovskites have limited structural types and contain high levels of toxic lead, which severely hinders their further applications. Herein, by using a mixed-cation strategy, an unprecedented type of lead-free cluster-based 2D chiral hybrid double perovskite derivatives are successfully obtained, [( R / S -PPA) 4 (IPA) 6 Ag 2 Bi 4 I 24 ]·2H 2 O ( 1-R and 1-S ), and [( R / S -PPA) 4 ( n -BA) 6 Ag 2 Bi 4 I 24 ]·2H 2 O ( 2-R and 2-S ) ( R / S -PPA= R / S –1-phenylpropylamine; IPA=isopentylamine; n -BA= n -butylamine). Their inorganic skeletons are linked by binuclear {Bi 2 I 10 } and infinite chain {Ag 2 Bi 2 I 14 } ∞ , in which bismuth clusters and multiple coordination modes (e.g., tetrahedral AgI 4 and octahedral AgI 6 ) are introduced into the double perovskite system for the first time. This introduction induces distortion of the inorganic layer, which may facilitate the transfer of chirality from the chiral cations into achiral double perovskite skeletons. Further, circular dichroism measurements and circularly polarized light detection confirm their inherent chiral optical activities. In addition, 1-S exhibits an ultralow X-ray detection limit of 129.5 nGy s −1 , which is 42-fold lower than that of demands in regular medical diagnosis (5.5 µGy s −1 ). This study provides a pathway to construct novel type of lead-free cluster-based double perovskite derivatives.
研究领域:
材料科学
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光学
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辐射检测
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DOI
高影响因子
Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 31
·10527-10534
·
IF 6.4
Peng Yang,Yifan Xie,Li Wen,Liyu Gan,Linxiao Deng,Hongli Zhang,Jiahe Li,Zeyu Feng,Chutian Zhang,Lixin Xu,Gang Zou
Achieving strong and dynamic tunable chiroptical responses in flexible films is highly desirable for potential applications including 3D optical displays, biosensors, and so on. Recently, controlled twisted stacking of two anisotropic layers became a popular strategy to fabricate artificial chiral nanostructures. However, in most cases, their structure and chiroptical responses are fixed, limiting their practical applications. Herein, we employed polydiacetylene (PDA)–Cs+ and PDA–Zn2+ assemblies as the individual layers within the twisted stacking structures and the hybrid films exhibited giant optical activity as well as excellent mechanical deformability. The chromatic transitions of the PDA layer under in situ water or electrothermal stimuli enable simultaneous control of two circular dichroism (CD) characteristics (magnitude and spectral position). By taking advantage of such programmable chiroptical responses, we demonstrate that PDA films have potential for full color, fast responsive, and circular polarization-based multiplex laser displays and higher-dimensional anti-counterfeiting applications. This work not only provides flexible chiral PDA films with strong and dynamic tunable chiroptical responses but is also of great fundamental value for the rational design of smart chiroptical devices.
研究领域:
材料科学
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光学
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生物传感
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DOI
高影响因子
Small
·
2023
·Vol. 19
·期 32
·2303064
·
IF 13.3
Yi Zhou,Canhui Lu,Zhixing Lu,Zhen Guo,Chunhong Ye,Vladimir V. Tsukruk,Rui Xiong
Advanced multiplexing optical labels with multiple information channels provide a powerful strategy for large-capacity and high-security information encryption. However, current optical labels face challenges of difficulty to realize independent multi-channel encryption, cumbersome design, and environmental pollution. Herein, multiplexing chiroptical bio-labels integrating with multiple optical elements, including structural color, photoluminescence (PL), circular polarized light activity, humidity-responsible color, and micro/nano physical patterns, are constructed in complex design based on host-guest self-assembly of cellulose nanocrystals and bio-gold nanoclusters. The thin nanocellulose labels exhibit tunable circular polarized structural color crossover the entire visible wavelength and circularly polarized PL with the highest-recorded dissymmetry factor up to 1.05 due to the well-ordered chiral organization of templated gold nanoclusters. Most importantly, these elements can independently encode customized anti-counterfeiting information to achieve five independent channels of high-level anti-counterfeiting, which are rarely achieved in traditional materials and design counterparts. Considering the exceptional seamless integration of five independent encryption channels and the recyclable features of labels, the bio-labels have great potential for the next generation anti-counterfeiting materials technology.
研究领域:
材料科学
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光学
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纳米技术
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生物工程
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DOI
PubMed
高影响因子
Nanoscale
·
2024
·
IF 5.8
Mengjia Cen,Jiawei Wang,Ming Cheng,Ziyan Lei,Ye Li,Zhenming Wang,Xueqian Zhao,Zixuan Wu,Huanian Zhang,Yan Jun Liu
Manipulating circular dichroism in chiral metasurfaces has been increasingly important for a wide range of polarization-sensitive photonic applications. However, simple methods for presenting chiral nanostructures with tunable and considerable chiroptical responses in the near-infrared-I regime remains underexplored. Herein, two sheets of suspended symmetric bilayer metagratings fabricated via single-step electron beam lithography are stacked into a moiré metasurface with its circular dichroism value reaching up to 20.9°. The chirality of the moiré metasurface can be fully tuned in terms of both its sign and magnitude by adjusting the in-plane angle between the two twisted sheets of metagratings. The multilayered design is accessible to the coupling of hybridized plasmons for governing the chiroptical properties in the near-infrared-I regime. The ratio between the resonance wavelength and the grating period is about 1.65, which is much lower compared to that in most existing moiré metasurfaces with strong chiroptical responses. Furthermore, the superchiral fields in the inter-sheet region are further exploited for label-free enantiodiscrimination with ultrahigh sensitivity of 10.17 nm fmol−1 mm2. The proposed moiré metasurfaces with strong near-infrared-I chirality hold great potential for supporting polarization engineering and biomolecular detection, paving a way for advanced applications in medical diagnosis, biomedical imaging, and display technologies.
研究领域:
纳米光子学
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生物医学检测
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光学工程
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DOI
PubMed
高影响因子
SCIENCE
·
2025
·Vol. 389
·期 6761
·
IF 45.8
Minju Kim,Mingyue Zhang,You-Liang Zhu,Yan Yan,Xin Pu,Woosung Choi,Sein Chung,Kilwon Cho,Jeongwon Kim,Vladimir Tsukruk,Zhenzhong Yang,Nicholas A. Kotov,Zhong-Yuan Lu,Dong Ha Kim,Zhiqun Lin
Supramolecular assemblies hold great promise for advanced chiral materials because of their structural diversity and dynamic features, but their low chiroptical activity limits practical applications. We report hierarchical supramolecular assemblies with giant chiroptical activity and mechanical attributes achieved through coassembly of achiral amphiphilic unimolecular micelles and chiral additives. Chiral fibrillar assemblies emerge from the nanostructured environment imposed by the micelles, driven by progressive chirality transfer through multiple hydrogen bonds between components. Integrating multifarious achiral luminescent molecules and nanocrystals into these assemblies leads to full-color circularly polarized luminescence–active materials with dissymmetry factors of ~10 −1 . A concentration-dependent chirality inversion is accessed through tailoring the coassembly kinetics. This strategy enables efficient red CPL, crucial for quantum and optical technologies.
研究领域:
超分子化学
·
材料科学
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手性光学
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纳米技术
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发光材料
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产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·Vol. 34
·期 44
·2407232
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IF 18.5
Sizhu Wu,Xinkai Li,Xin Liu,Haijian Hu,Rui Dong,Jincheng Ni,Deng Pan,Yanlei Hu,Chenchu Zhang,Chao Chen,Yachao Zhang,Haojie Xia,Dong Wu,Zhaoxin Lao
Capillary force self-assembly (CFSA) technology unfolds great potential in the fabrication of functional micro/nanostructures. To date, most self-assembly methods focus on monolithic microstructure manipulation yet it remains a challenge to achieve precise localized control over the CFSA process of micro/nanostructures. Herein, a light-regulated CFSA is proposed to realize the localized precise control of microstructures, leveraging on the synergistic effect of photothermally-responsive hydrogel and self-assembly technique. The micropillars with asymmetric cross-linking densities can readily prepare by applying a rationally designed laser and laser-exposing dosage, thereby realizing the on-demand steering of their bending directions. Significantly, owing to the giant capillary force deriving from the evaporating water, above micropillars can successfully assemble into highly-ordered chiral structures. Simulation coupling with fundamental hydrodynamics enables to shed light on the light steering principle over pillar's actuations. Last, on the basis of vortical dichroism spectra analysis, the chiral characteristics of light-regulated self-assembly including the chiral as well as the achiral self-assembled microstructures are successfully deployed. This strategy provides an avenue for fabricating the localized controllable self-assembly at the microscale and will bloom the field over metamaterials, microsensors, chiral optics, and so on.
研究领域:
材料科学
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光学工程
·
微纳米技术
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产品关联
DOI
高影响因子
Nature Communications
·
2023
·Vol. 14
·期 1
·1-14
·
IF 16.6
Li Jingjing,Cui Yihan,Lu Yi-Lin,Zhang Yunfei,Zhang Kaihuang,Gu Chaonan,Wang Kaifang,Liang Yujia,Liu Chun-Sen
The dynamic regulation of supramolecular chirality in non-equilibrium systems can provide valuable insights into molecular self-assembly in living systems. Herein, we demonstrate the use of chemical fuels for regulating self-assembly pathway, which thereby controls the supramolecular chirality of assembly in non-equilibrium systems. Depending on the nature of different fuel acids, the system shows pathway-dependent non-equilibrium self-assembly, resulting in either dynamic self-assembly with transient supramolecular chirality or kinetically trapped self-assembly with inverse supramolecular chirality. More importantly, successive conducting of chemical-fueled process and thermal annealing process allows for the sequential programmability of the supramolecular chirality between four different chiral hydrogels, affording a new example of a multistate supramolecular chiroptical switch that can be recycled multiple times. The current finding sheds new light on the design of future supramolecular chiral materials, offering access to alternative self-assembly pathways and kinetically controlled non-equilibrium states.
研究领域:
化学
·
材料科学
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纳米技术
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产品关联
DOI
PubMed
高影响因子
ACS Nano
·
2020
·
IF 14.588
Jianjian Zhao,Yaqing Liu,Aiyou Hao,Pengyao Xing
The emergence, amplification, and manipulation of chiroptical activity in self-assembled nanostructures, including circularly polarized absorbance and luminescence (CPL), remain considerable challenges. Here, we report the high-throughput synthesis of nanostructures with finely tailored chiroptical activities. Two fully π-conjugated benzimidazoles formed H-bonded complexes with natural hydroxyl acids (tartaric acid and mandelic acid), which self-assembled into diversified macroscopically chiral nanostructures. Synergistic coassembly allows for the emergence of Cotton effects and CPL with high dissymmetry g-factors (gabs up to 8 × 10–3, glum up to 3 × 10–3). The tartaric acid coassembled system exhibits enantiomer-independent left-handed CPL, which transforms into a cooperative ternary coassembly appended with enantiomer-resolved CPL with extended emission wavelength upon selective transition metal ion chelation. This H-boned coassembly system provides a vast number of chiral nanostructures with flexibly tuned Cotton effects and CPL, which also behaves as a selective chiroptical sensor to metal ions.
研究领域:
材料科学
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纳米技术
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物理化学
·
光学
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产品关联
DOI
PubMed
高影响因子
Frontiers in Chemistry
·
2024
·
IF 3.8
Qi Ding,Fang Wang,Weimin Yang,Xinhe Xing,Hengwei Lin,Liguang Xu,Si Li
Developing highly sensitive and selective detection methods is crucial for environmental and healthcare monitoring. In this study, the chiral and fluorescent signals of L-glutathione-modified gold nanoclusters (L-GSH-Au NCs) were discovered to be responsive to Co2+, which displayed linear correlations with the concentration changes of Co2+. Notably, the chiral signal was more sensitive than the FL signal, whose limit of detection (LOD) was calculated to be 0.37 μM and 3.93 times lower than the LOD obtained with fluorescent signals. Moreover, the chiral signals exhibited unexpectedly high selectivity towards Co2+, effectively avoiding interference from other metal ions and biomolecules. Furthermore, the concentrations of Co2+ in various samples, such as Taihu water, tap water, bottled water, and animal serum, were accurately quantified using the chiral signals of L-GSH-Au NCs without complex pretreatment, with recoveries ranging between 95.64% and 103.22%. This study not only provides an innovative approach for Co2+ detection but also highlights the detection capabilities of chiral signals in complex environments.
研究领域:
分析化学
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环境科学
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纳米技术
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产品关联
DOI
PubMed
高影响因子
Nanoscale
·
2019
·Vol. 11
·期 45
·21990-21998
·
IF 6.97
Huali Liu,Zhen Li,Yan Yan,Jiaqi Zhao,Yu Wang
The coupling between noble metal nanostructures and chiral molecules gives rise to strong chiroptical responses in the range from the ultraviolet (UV) to visible spectrum. In this work, cysteine-modified Au/Ag alloyed nanotubes (ANTs) have been prepared by coupling cysteine with Au/Ag ANTs. The chiroptical responses strongly depend on the chirality of cysteine and show clear mirrored behaviours. In contrast to Ag- or Au-cysteine chiral hybrid nanorods, the cysteine-modified Au/Ag ANTs exhibit higher chiroptical responses due to a stronger local electromagnetic field. The induced CD signals emerge in the interband absorption region of Au/Ag ANTs rather than in the local surface plasmon bands, which can be attributed to both the extended helical network conformation on the surface of Au/Ag ANTs and the near-field enhancement effect of plasmonic nanotubes. This confirms that Coulomb interaction induces coupling between cysteine and Au/Ag ANTs, which allows cysteine molecules to form an extended helical network on the surface of Au/Ag ANTs. Furthermore, the cysteine-modified Au/Ag ANTs also show excellent chiral recognition for amino acids in catalytic electrochemical reactions due to the presence of chiral active sites and the steric effect of large groups.
研究领域:
纳米材料科学
·
生物化学
·
光学
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产品关联
DOI
PubMed
高影响因子
EUROPEAN POLYMER JOURNAL
·
2024
·
IF 5.8
Fengyun Shi,Wan Zhang,Junqian Zhang,Hongkun Li,Bing Shi Li
Realizing high circularly polarized luminescence (CPL) in polymer system is an important but challenging task. Herein, we provide a strategy for designing conjugated polymers with high CPL performance upon the complexation with mandelic acids. Two tetraphenylethylene (TPE)-based conjugated polymers, l - P1 and d - P1 , were synthesized by Sonogashira polycoupling reactions between the TPE-containing diethynyl monomer and dibromo aryl monomers carrying valine methyl ester groups. Both the polymers showed aggregation-induced emission (AIE) properties and the capabilities to self-assemble into regular helical nanostructures on nanoscale and fluorescent microfibers on microscale. They exhibited weak circular dichroism (CD) signals; upon the complexation with R / S -mandelic acids, their CD absorption and fluorescence emission can be efficiently enhanced. The composite films of l/d - P1 and R / S -mandelic acids exhibited excellent complexation-induced CPL properties with the absolute luminescence dissymmetric factor ( g lum ) up to 0.01 and the fluorescence quantum yield up to 26.8%; the g lum values showed little dependence on their emission wavelength. Various types of carboxyl acids have been screened and only mandelic acids show significantly chiroptical induction. The specific interaction between mandelic acids and l/d - P1 also makes the latter promising candidates for the enantioselective recognition of chiral organic molecules.
研究领域:
材料科学
·
有机化学
·
光化学
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产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2014
·
IF 3.916
Yadong Liu,Xiaosa Jin,Xiaosa Zhang,Miaomiao Han,Shengxiang Ji
Three amphiphilic poly( N -acryloyl- l -amino acid) grafted celluloses were prepared by RAFT polymerization of N -acryloyl- l -amino acid, where amino acid is alanine, proline or glutamic acid, onto cellulose backbones. The chemical structure and solution properties of the brush copolymers were characterized with FTIR, NMR and wide angle X-ray diffraction (WAXD). The thermal stability of the brush copolymers was estimated by thermal gravimetric analysis (TGA). Circular dichroism (CD) and specific rotation measurements confirmed that these grafted celluloses had characteristic chiroptical properties. The amphiphilic brush copolymers self-assembled into micelles in the aqueous solution as confirmed by transmission electron microscopy (TEM) and dynamic light scattering (DLS) analyses. The micellar aggregates showed a tunable pH-responsive property and disaggregated to form unimolecular micelles at higher pH in diluted solutions. The brush copolymers have potential applications in controlled drug release and high-performance liquid chromatography, and so forth.
研究领域:
高分子化学
·
材料科学
·
生物医学工程
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）