Advanced Optical Materials
·
2025
·
IF 7.2
Jie Xu,Yanyan Li,Yuge Yao,Yanjun Ding,Yaying Tan,Gaoji Hu,Shiming Zhang,Lintao Zeng
In nature, the ability to regulate and transmit color signals is fundamental to the adaptive survival of many organisms. A key aspect of this adaptability is the autonomous detection of chromatic changes in color-displaying structures, facilitating precise color matching with environmental stimuli. However, conventional mechanochromic materials rely on a single mechanical force feedback channel, lacking the ability to continuously monitor their color state in real-time. In this work, a novel approach is presented that integrates ZnS@SiO 2 photonic crystals and LiCl into a TEMPO-Oxidized cellulose nanofibers-polyacrylamide hydrogel matrix (PAM-TOCNF hydrogel), which successfully endow conductivity variation into this mechanochromic hydrogel. This system mimics the chameleonic mechanism by coupling mechanical force with ion conduction to achieve responsive color changes and real-time color process monitoring. These findings establish a new paradigm for optoelectronic systems with stimulus-responsive capabilities, paving the way for future advancements in bio-inspired, adaptive technologies.
研究领域:
材料科学
·
生物工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 29
·e55655
·
IF 2.7
Ruiqi Chen,Lin Zhou,Kuibao Zhang,Mao Chen
Disulfide-contained vitrimers that possess unprecedented functions, such as reprocessing and self-healing, are considered to be one of the most promising materials since they also exhibit mechanochromic behaviors. A few reports have given the phenomenon of mechanochromism, but the relationship between their structure and mechanochromic behavior needed to further research. Herein, three aromatic disulfide-contained epoxy vitrimers with different degree of unsaturation are prepared by changing the epoxy monomer. The effect of network structure on the dynamic and mechanochromic properties are investigated. With increasing the degree of unsaturation from the aliphatic to aromatic epoxy vitrimers, the T g -value increases and the chain mobility decreases, so the aliphatic epoxy vitrimers shows the lowest activation energy, the lowest temperature of malleability T v , and the shortest relaxation times. In addition, these epoxy vitrimers all showes reversible mechanochromic behaviors due to the generation and coupling of sulfenyl radicals, which can be accelerated by the high temperature and solvent. Meanwhile, the epoxy structure has a great influence on the mechanochromic behavior, including the absorption wavelength and fading kinetics of grinding powders. These results can be utilized to design desired vitrimer materials for various applications that requires both the intrinsically self-report damage and the dynamic properties such as recycling.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Aojue Ke,Chunhao Li,Zhanyang Mai,Xiang Jiang,Xinya Zhang
Photonic crystal (PC) sensors have attracted increasing attention for their visual signal output. However, their applications are hindered by the small-scale, defective arrays, and the time-consuming self-assembly. Herein, an efficient self-skinning method for regulating assembly of polystyrene (PS) microspheres and a large-scale PC sensor have been developed. The flowability and rapid reconfigurability of pre-crystallized PS dispersions were investigated through numerical simulation, allowing for control of the assembly through the colloid skin. The simulation and SEM characterization verify that the regulation of colloid skin suppresses the uneven evaporation flux and thus the large-scale and crack-free PC arrays (100 × 400 mm 2 ) are fabricated within 150 s. The PC sensor shows reversible visual signal output with mechanochromic sensitivity of 4.95–12.1 nm∙kPa −1 . The scalable PC sensor achieves sensitive-monitoring of human plantar pressure through visual signal output, suggesting a promising potential in gait recognition, health analysis, and so on.
研究领域:
材料科学
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光学工程
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
·
2024
·
IF 8
Meng Wang,Xiaosong Li,Hui Yang,Huai Yang
Inspired by the color-changing abilities of natural organisms, this research focuses on the design and fabrication of mechanochromic liquid crystal photonic crystal thin films with periodic self-assembly structures. Benefiting from its unique 3D self-assembled structure with a body-centered cubic lattice, BP I film exhibits excellent mechanical properties, characterized by superior elasticity and toughness due to the presence of rigid and flexible microdomains and suitable dislocation line volumes. As the strain increases, the structural color of the BP I film demonstrates a repeatable and rapid shift from red to blue, covering the entire visible light spectrum with high reflectivity. The incorporation of fluorescent molecules further enhances the mechanical properties and endowing the film with circularly polarized luminescence under UV light irradiation. Utilizing different fluorescent dyes as inks, arbitrary patterned writing can be performed on the BPI film, enabling specific information hiding and encryption. The prepared label exhibits excellent environmental stability, presenting promising applications in information storage, anti-counterfeiting, and flexible 3D displays. The study may contribute to a deeper understanding of the relationship between microstructure, mechanical deformation, and optical properties, potentially advancing the development of innovative responsive materials and multifunctional devices.
研究领域:
材料科学
·
光学
·
仿生学
✓ 已验证
产品关联
DOI
高影响因子
Journal of the American Chemical Society
·
2015
·
IF 12.113
Zhennan Wu,Jiale Liu,Yang Gao,Huiwen Liu,Tingting Li,Haoyang Zou,Zhigang Wang,Kai Zhang,Yue Wang,Hao Zhang,Bai Yang
Metal nanoclusters (NCs) as a new class of phosphors have attracted a great deal of interest owing to their unique electronic structure and subsequently molecule-like optical properties. However, limited successes have been achieved in producing the NCs with excellent luminescent performance. In this paper, we demonstrate the significant luminescence intensity enhancement of 1-dodecanethiol (DT)-capped Cu NCs via self-assembly strategy. By forming compact and ordered assemblies, the original nonluminescent Cu NCs exhibit strong emission. The flexibility of self-assembly allows to further control the polymorphism of Cu NCs assemblies, and hence the emission properties. Comparative structural and optical analysis of the polymorphic NCs assemblies permits to establish a relationship between the compactness of assemblies and the emission. First, high compactness reinforces the cuprophilic Cu(I)···Cu(I) interaction of inter- and intra-NCs, and meanwhile, suppresses intramolecular vibration and rotation of the capping ligand of DT, thus enhancing the emission intensity of Cu NCs. Second, as to the emission energy that depends on the distance of Cu(I)···Cu(I), the improved compactness increases average Cu(I)···Cu(I) distance by inducing additional inter-NCs cuprophilic interaction, and therewith leads to the blue shift of NCs emission. Attributing to the assembly mediated structural polymorphism, the NCs assemblies exhibit distinct mechanochromic and thermochromic luminescent properties. Metal NCs-based white light-emitting diodes are further fabricated by employing the NCs assemblies with blue-green, yellow, and red emissions as phosphors.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2014
·Vol. 24
·期 41
·6430-6438
·
IF 10.439
Siyun Ye,Qianqian Fu,Jianping Ge
Invisible photonic prints shown by deformation are prepared by soaking the mechanochromic photonic paper with crosslinker (PEGDA) and subsequently crosslinking part of the paper through a photo lithography process. The key point of this new technique is creating patterns and background with very close photonic structures but different mechanochromic capabilities, so that the invisible photonic patterns in relaxed state can be revealed under deformation due to the nonuniform change in photonic structure. Based on the relationship between crosslinking level and the reflection changes during deformation, one can conclude that a low crosslinking level favors the hiding of invisible patterns and a high crosslinking level favors the showing of patterns. The as-prepared samples can instantly and reversibly show the patterns by deformation and hide them by relaxation for many times, and the encapsulation by PDMS rubber prolongs its life time and enhances its durability in practical usages. The current printing technique is capable of creating invisible photonic prints in both macroscale and microscale range, which makes them potentially useful for security and antifraud applications in daily life.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
Polymer Chemistry
·
2021
·Vol. 12
·期 26
·3832-3841
·
IF 5.582
Taisheng Wang,Haoxiang Wang,Lei Shen,Na Zhang
Mechanochromic polymers (MCPs), which respond to mechanical stimuli via an optical signal change, are regarded for their application in smart materials, such as force sensors. Although rapid progress in MCPs has been witnessed in recent years, MCPs systems that can distinguish different magnitudes of stretching or compression stress through multicolor transformation are still hard to achieve. In this paper, we report our findings on a multicolor mechanochromic elastomer that can discriminate between low and high stretching stress. The key point of our design depends on the introduction of two mechanophores, which present different fluorescence changes in response to mechanical stimuli. These mechanophores were elaborately introduced to the multi-network elastomer though a multiple swelling–UV polymerization process. Under relatively low tensile stress (≲1.8 MPa), the formation of a blue-fluorescence anthracene derivative was observed, while under high tensile stress (≳1.8 MPa), both mechanophores were activated. Thus, the elastomer exhibited a blue-white and further red fluorescence. Although the present results remain preliminary, the macroscopic fluorescence change at different levels of stress could indicate where the stress is concentrated, which would be beneficial to elucidate the mechanism of material failures.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
Advanced Materials Interfaces
·
2022
·Vol. 9
·期 10
·2102047
·
IF 6.389
Zhaosong Wang,Jiayi Zhang,Zhuyue Lan,Qingyu Meng,Ruixin Tang,Xiaoping Shen,Qingfeng Sun
Stretchable structural colors that can dynamically respond to mechanical stimuli are garnering interest as energy-free mechanical-optical sensors. Typical technologies for embedding photonic crystals (PCs) in elastic hydrogels generally involve etching processes, which have raked controversy for straying from green manufacturing practices. Here, a facile pressure-assisted self-assembly strategy to fabricate an interfacial photonic structure, i.e., semicrystalline photonic structure (SPS), consisting of two diffraction nanopatterns, including randomly oriented, medium-scale ordered PCs and arbitrarily distributed amorphous photonic glass using hydrophilically modified colloidal polystyrene (PS) nanospheres configured at the hydrogel interface is introduced. The structural colors of the SPS hydrogel interfaces undergo immediate and repeatable mechanochromic redshift or blueshift in real time when the sample is longitudinally compressed or tensed, respectively, at both the micro zone and macroscopic color block levels. The SPS hydrogel interfaces display long-term colorfast, angle-independent, or non-iridescent coloration and bright structural colors in a high reflective-intensity range of 62%–96% at a normal viewing angle. With these features, this study demonstrates the feasibility of fabricating SPS hydrogel interfaces with mechanical and optical properties that are compatible with state-of-the-art stretchable optical sensors.
研究领域:
材料科学
·
光学工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Xiaohui Wang,Yichen Li,Jianyong Zheng,Xinyang Li,Guojin Liu,Lan Zhou,Wenlong Zhou,Jianzhong Shao
Responsive photonic crystals (PCs) with a nanoscale band gap assembled by colloidal nanospheres have been increasingly utilized in detection and sensing devices owing to their attractive ability to change color in response to external conditions. However, most of the reported works have been dedicated to single-functional PCs, which can only be used as sensors or detectors in a specific situation. Thus, producing a multi-functional PC for various industrial applications remains a challenge. In this work, multi-functional soft PC films (SPCFs) with a brilliant structural color and a robust structure are fabricated by using polystyrene@poly(methyl methacrylate-butyl acrylate) [PS@P(MMA-BA)] nanospheres with size in the range of 200–350 nm as building blocks. The SPCFs possess both the mechanochromic and solvatochromic properties owing to the adjustable photonic band gap under stress and polar solvent conditions. The mechanochromic effect of the SPCF under stretching results in a blue shift of the structural color due to the decrease in lattice spacing. In contrast, the solvatochromic mechanism of the SPCF is that it can be swollen by polar solvents, resulting in the increase in the lattice spacing of PCs and a red shift of the structural color. Meanwhile, the SPCF can keep its original structural color while stretched for 20 cycles or when the organic solvent is completely evaporated. Therefore, robust multi-functional SPCFs fabricated by the self-assembly of PS@P(MMA-BA) nanospheres under gravity sedimentation can respond to stress and organic solvents, showing great potential for use in sensors and detectors.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
ChemistrySelect
·
2023
·Vol. 8
·期 17
·e202300501
·
IF 2.1
Nannan Chen,Yongbo Wei,Wei Liu,Tong Wu,Jingming Zhou,Yuqiu Ye,Zexin Wang,Yanbing Ke,Hong Jiang,Lijun Xie
Graphical A facile strategy was employed to achieve ACQ/AIE transition by modulation of substituent groups on rofecoxib analogues. The compound 1 b-3 with −Br substituent shows AIE activity while 2 a-3 with the −NH 2 substituent exhibits ACQ effect. Moreover, compound 1 b-3 as an AIE-active compound, shows mechanochromic, acidochromic properties, and its potential applications in the field of mechanical-force sensors and living cells imaging probes have been demonstrated. Aggregation-induced emission luminogens (AIEgens) have been widely investigated due to their promising applications in data storage, organic light-emitting diodes, and deep tissue bioimaging as compared to conventional fluorophores. In this work, we have designed and synthesized two novel rofecoxib analogues functionalized with different terminal groups (−NH 2 , −Br) on the benzene ring B. Interestingly, the compound 2 a-3 with −NH 2 substituent shows aggregation-caused quenching effect whereas the compound 1 b-3 with −Br group displays aggregation-induced emission (AIE) property which may be caused by the twisted conformation and restricted – stacking of 1 b-3 according to the X-ray single crystal diffraction analysis. These opposite results indicated that the terminal groups could have great influence on the photophysical properties of targets. Moreover, the compound 1 b-3 exhibited multi-stimuli response luminescence behaviors under various external stimuli including solvatochromism, mechanochromism and acidochromism. Furthermore, lipid droplets imaging investigation proved the compound 1 b-3 was capable of achieving specific lipid droplets bioimaging. This work not only presents a better understanding of the structure-fluorescent property relationship based on the scaffold of rofecoxib, but also provides a new avenue for spectral modulation and the development of new MSR materials.
研究领域:
有机化学
·
生物医学工程
·
材料科学
✓ 已验证
DOI
高影响因子
The Innovation
·
2025
·
IF 25.7
Yuting Lin,Jianyu Zhang,Wen-Jin Wang,Zhenguo Tang,Xianying Fang,Xu Xu,Fritz E. Kühn,Zheng Zhao,Qiang Yong,Ben Zhong Tang,Xu-Min Cai
The aggregation process plays a significant role in regulating the aggregate structures from molecules toward macroscopic photophysical properties. Pyrene (Py), as the simplest dimer candidate, serves as a suitable model for studying the aggregation. Herein, a series of Py-based aggregation-induced emission (AIE) materials have been investigated by clarifying the comprehensive roles of oxygen, substituents, molecular motion, and packing during aggregation, initially realizing the aim of controlling aggregate structures. With a largely planar and conjugated conformation, Py shows anomalous AIE characteristics due to the oxygen quenching at the molecular level but turn-on fluorescence in the aggregate state because of the oxygen isolation. Although introducing substituents induces molecular motion and similarly weakened luminescence in the molecular state, the impact of substituents on the aggregate-state photophysical properties enormously differs, exhibiting from weak blue, strong cyan, and strong green to weak yellow emissions, due to variable aggregate structures. Interestingly, the natural alicycle-substituted Py-dehydroabietylamine (Py-DAA) exhibits both mechanochromism and acidichromism, which can be synergistically applied in dynamic encryption-decryption. This work not only elucidates the unique AIE property of Py for the first time but also clarifies the bridging role of aggregation between single-molecular and aggregate states, achieving preliminary control over the aggregate structures.
研究领域:
化学
·
材料科学
·
光物理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DYES AND PIGMENTS
·
2023
·
IF 4.5
Yutong Xiong,Weiren Zhong,Xuedan Zhang,Yuting Lin,Zhenguo Tang,Shouji Li,Xu-Min Cai
The petrochemical-based multi-stimuli responsive materials have been widely explored as advanced functional materials in the past several decades, but they inevitably face problems like complicated synthesis, non-renewability, and non-sustainability. On this basis, the bio-based materials used to construct multi-stimuli responsive due to the unique natural structures have come to the fore. In this work, three novel triphenylamine-based salicylideneanilines have been simply designed with aggregation-induced emission (AIE) properties. Among all, DAMB-TPAOH and DAMB-TPA possessing the natural structure of dehydroabietic acid from rosin are bioproduct-inspired AIE luminogens (BioAIEgens). Derived from the excited-state intramolecular proton transfer (ESIPT) and restriction of intramolecular motion (RIM) dual-mechanism caused by the hydroxyl group and rigidification of alicyclic moiety, respectively, the solid-state DAMB-TPAOH exhibits red-shifted (compared to DAMB-TPA ) and stronger (compared to BA-TPAOH ) emission, endowing this BioAIEgen with the best fluorescence behavior. Further, the introduction of the natural skeleton, propeller TPA, and imine group results in the high-contrast mechanochromic and acidichromic properties of DAMB-TPAOH . The multi-stimuli responsive properties endow DAMB-TPAOH with potential utilization in the manufacture of rewritable paper and multi-color ink. The current work contributes greatly to the development of BioAIEgens with both mechanochromism and acidichromism.
研究领域:
材料科学
·
有机化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）