Soft Matter
·
2018
·Vol. 14
·期 11
·2112-2117
·
IF 3.709
Shangyang Li,Aiyou Hao,Jian Shen,Ningzhao Shang,Chun Wang
In order to fabricate a novel supra-amphiphile with multiple stimulus properties, we developed the strategy of introducing a bi-functional linker to bridge the hydrophilic and hydrophobic building blocks together, by utilizing more than one kind of interaction. We characterized the assembled structure and morphology of the supra-amphiphile using transmission electron microscopy (TEM), dynamic light scattering (DLS) and X-ray diffraction (XRD). 1H NMR and UV-vis spectroscopy studies revealed that the amphiphile was constructed by the effect of host–guest recognition and a dynamic covalent bond, which could be switched ‘‘on’’ and ‘‘off’’ via UV irradiation and pH variation stimuli, respectively. This responsiveness realized finely controllable self-assembly behaviors of the supra-amphiphile, which was thus able to encapsulate and release the drug model rhodamine B.
研究领域:
材料科学
·
化学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Yuye Zhu,Min Chen,Limin Wu
Polymeric coatings are usually threatened by some harsh environment factors, which induce the formation of cracks or loss of functional components. Traditional extrinsic self-healing coatings usually have only one single repair mode (crack-repairing or function-restoring mode) that may not be powerful enough to meet the complex repair needs in practical applications. Herein, we first report a UV-responsive, dual-functional, fully-utilized microsphere-based system for highly efficient self-healing coatings, in which the UV-reversible coumarin crosslinking shells can not only encapsulate and release functional compounds as the function-repairing agents, but also participate in self-healing process as the crack-repairing agents, thus realizing two modes of repair with 100% of utilization efficiency of microspheres.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Hangtao Ye,Qin Wang,Ziyao He,Yao Tong,Wei Xia,Hongbin Fan,Weidong Xiang,Xiaojuan Liang
In recent years, silicon (Si) photodetectors (PDs) have been widely used in daily life, but the ultraviolet (UV) region response is extremely low, while perovskite nanocrystals (NCs) can be used as a light conversion layer to effectively improve the UV region detection performance due to their high absorption coefficient. At the same time, embedding NCs into a glass matrix can protect NCs from the adverse external environment, which can greatly prolong the effective working time of the detector. In this work, a series of perovskite NC glasses (PNGs) with intrinsic emission but still maintaining high transmittance were fabricated successfully by regulating the concentration of CsPbCl2Br1 NCs. Furthermore, the rare-earth ion Tb3+ was successfully introduced into CsPbCl2Br1 NCs, achieving energy transfer of the exciton to Tb3+, and the photoluminescence quantum yield (PLQY) had a big boost from 11.1 to 28.1%. In the end, the prepared CsPbCl2Br1:Tb3+ PNG was first integrated with Si PDs, and the UV responsibility of Si PDs was enhanced due to the absorption of CsPbCl2Br1 PNG doped with Tb3+ in the UV region. At 320 nm, the responsivity of Tb3+-doped CsPbCl2Br1 PG-Si PDs is significantly higher than that of bare Si PDs. In addition, CsPbCl2Br1:Tb3+ PNG-Si PDs maintained excellent photocurrent stability. The CsPbCl2Br1:Tb3+ PNGs are expected to be one of the optimum semiconductor materials for next-generation high-performance UV PDs.
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
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Hong Wan,Guancong Chen,Xiaorui Zhou,Hongfeng Mu,Chen Yang,Di Chen,Chujun Ni,Zizheng Fang,Qian Zhao,Tao Xie,Ning Zheng
The versatile actuation of liquid crystal elastomers (LCEs), crucial for future soft robots, is determined by both geometrical shape and mesogen alignment. 3D printing can effectively manufacture complex shapes of LCEs, yet the precise reprogramming of mesogen alignment remains beyond control. To address this challenge, we report an orthogonal photochemistry design to decouple 3D printing and mesogen alignment. The former is achieved through visible light-triggered radical polymerization, whereas the latter can be accomplished via UV irradiation. While seeking suitable UV-sensitive chemistries compatible with traditional photocurable 3D printing, we demonstrate that the hexaarylbiimidazole structure is capable of dynamic bond exchange upon UV exposure. This remarkable UV responsive dynamic feature enables the programming, erasing, and multiple reprogramming of mesogen alignments for a 3D printed LCE in a spatio-temporal manner. The underlying strategy enables the realization of LCEs with arbitrary reprogrammable actuation, enriching the design strategies for future soft robots.
研究领域:
材料科学
·
软体机器人技术
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2021
·Vol. 31
·期 45
·2106000
·
IF 18.808
Tianshi Zhao,Chun Zhao,Wangying Xu,Yina Liu,Hao Gao,Ivona Z. Mitrovic,Eng Gee Lim,Li Yang,Ce Zhou Zhao
The highly parallel artificial neural systems based on transistor-like devices have recently attracted widespread attention due to their high-efficiency computing potential and the ability to mimic biological neurobehavior. For the past decades, plenty of breakthroughs related to synaptic transistors have been investigated and reported. In this work, a kind of photoelectronic transistor that successfully mimics the behaviors of biological synapses has been proposed and systematically analyzed. For the individual device, MXenes and the self-assembled titanium dioxide on the nanosheet surface serve as floating gate and tunneling layers, respectively. As the unit electronics of the neural network, the typical synaptic behaviors and the reliable memory stability of the synaptic transistors have been demonstrated through the voltage test. Furthermore, for the first time, the UV-responsive synaptic properties of the MXenes floating gated transistor and its applications, including conditional reflex and supervised learning, have been measured and realized. These photoelectric synapse characteristics illustrate the great potential of the device in bio-imitation vision applications. Finally, through the simulation based on an artificial neural network algorithm, the device successfully realizes the recognition application of handwritten digital images. Thus, this article provides a highly feasible solution for applying artificial synaptic devices to hardware neuromorphic networks.
研究领域:
神经科学
·
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
Physica Status Solidi-Rapid Research Letters
·
2024
·
IF 2.5
Yang Yu,Zhonglong Zhang,Qiuchun Lu,Jiaqi Tang,Wenqiang Wu,Xun Han
Copper-based halides, a type of perovskite derivative, inherit their excellent optoelectronic properties and solution processability and also have the advantages of being nontoxic and stable. Despite the tremendous achievements of microfabrication in conventional halide perovskites, reports on copper-based halide array devices are rare due to their difficult high-quality crystallization. Here, by introducing single-crystal thin films grown by space confinement method as substrates, reliable photolithography based on their single crystals is successfully achieved and controllable homoepitaxial single-crystal arrays is demonstrated. By adjusting the substrate, angle, and growth time, the orientation, arrangement, and size of arrays could be controlled. Temperature and time are used to regulate the growth stage to obtain clean and appropriately sized arrays. ITO/Cs 3 Cu 2 I 5 /ITO neuromorphic device based on homoepitaxial arrays is developed. The variation of synaptic plasticity could be controlled by the number and frequency of light pulses. The device successfully simulated the process of “learning, forgetting, and relearning” in the human brain, demonstrating the potential of application in sensing-storage-computing-integrated devices.
研究领域:
材料科学
·
光电子学
·
神经形态计算
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Yuye Zhu,Kangli Cao,Min Chen,Limin Wu
Advanced polymer composite coatings in the spacecraft are threatened by harsh space environment factors, such as strong UV radiation, atomic oxygen, thermal cycles, space debris, etc. Their service life can be drastically shortened by the unavoidable formation of cracks caused by these factors (especially strong and abundant UV radiation) during long-term flight. Herein, a UV-responsive microcapsule-based coating is developed for in-orbit damage repairing. UV-responsive microcapsules of which the inner polymeric shell can be degraded rapidly by the outer pure TiO2 shell under UV radiation are produced by UV-initiated polymerization of Pickering emulsions and subsequently embedded into silicon resin matrices. When damaged, some microcapsules will be ruptured under the stimulus of external force, afterward the unbroken ones around the scratched areas will be degraded by UV radiation, as a result, encapsulated healing agents can be released and finally repair cracks. In this system, UV-responsive microcapsules can release more agents more effectively due to the dual release mode, compared with the traditional crack-repairing system. Moreover, the damage of UV radiation in space can be transferred into the favorable ones, which makes it have a potential application in aerospace coatings.
研究领域:
材料科学
·
航空航天工程
·
高分子化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2018
·Vol. 6
·期 19
·5113-5121
·
IF 5.976
Zehao Song,Hai Zhou,Pengbin Gui,Xiaohan Yang,Ronghuan Liu,Guokun Ma,Hao Wang,Guojia Fang
Self-powered light-emitting photodetectors (SLEPs) can simultaneously transmit and receive information using light, offering huge potential for applications in interactive communication systems. However, high-performance SLEPs are very hard to achieve due to the seriously contradictory principles of carrier transport in SLEPs. In this study, a novel structure based on a ZnO hollow ball/CsPbBr3 heterojunction, in which ZnO hollow balls function as an ultraviolet (UV) response center and CsPbBr3 is designed to be a green light-emitting material, is reported as a high-performance SLEP. Since the ZnO hollow balls have superior light trapping characteristics for UV light, the device shows a huge UV response with the on/off ratio and detectivity up to 16 527 and 2.4 × 1013 Jones, respectively. Moreover, it displays blue emission with a low threshold voltage because of CsPbBr3. Compared with the traditional ZnO/GaN structure devices, the device showed enhanced dual-functional performance at various wavelengths due to the insertion of CsPbBr3, which resulted in a better contact interface and green-light emission center. Our structure separating the light-responsive and emitting active regions avoids the contradictory principles of carrier transport, which may provide new access to gain high-performance dual-functional devices.
研究领域:
材料科学
·
光电子学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Chemistry
·
2021
·
IF 8.301
Y. You,M.R. Fu,M.Z. Rong,M.Q. Zhang
Thermoresponsive covalent adaptive networks (CANs) have attracted increasing research attention because of their temperature-dependent reversibility, which endows the materials with versatile smart functionalities including intrinsic self-healability not available for traditional thermosets . Nevertheless, the associated reduction in creep resistance of this type of CANs limits their practical application. Here in this work, we demonstrate that the reversibility and dimensional stability can be combined via interlocking the thermoresponsive network with an ultraviolet-responsive network. The two types of networks are, respectively, crosslinked by orthogonal reversible Diels-Alder (DA) bonds and coumarin. Owing to the interlocked architecture, the latter single network can be uniformly distributed in the former, restricting the chain movement and enhancing the creep resistance even when the former is decrosslinked at elevated temperature as a result of retro-DA reaction. Meanwhile, the ultraviolet-responsive network plays the role of a photo-reversible switch. Its decrosslinking on exposure to 254 nm ultraviolet (UV) light and recrosslinking under a UV irradiation of 350 nm lead to repeated releasing and reimposing of the restraints on the neighboring thermoresponsive network. By using this smart habit, the material can either be conditionally self-healed with moderate healing efficiency or completely self-healed depending on whether only DA bonds or both DA bonds and coumarin are triggered. More importantly, the conflicting properties, that is, creep resistance and reversibility of the CANs are thus united. The proposed strategy provides a facile way for overcoming the weaknesses of CANs while maintaining the advantage.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 30
·14310-14323
·
IF 4.682
Li Nanshu,Zhang Hanbing,Chen Zihao,Wei Jie
In this study, we report a kind of fluorescence-structural color photonic crystals (FSC-PCs) based on ultraviolet (UV)-responsive core-interlayer-shell (CIS) colloidal particles. The preparation process includes the synthesis of UV-responsive CIS colloidal particles and quick fabrication of FSC-PCs patterns. Here, fluorescent precursor spiropyran was added to the semi-continuous emulsion polymerization system and grafted onto polymer chains to form the colloidal particles, which were quickly assembled by spray coating method into FSC-PCs within a few minutes. The FSC-PCs have long-range disorder arrangement and angle-independent structural colors, which show structural colors in visible light and red fluorescent color in 365 nm UV light. Therefore, we designed and fabricated a two-side security card, both sides of which show different information under different light conditions. During the light switching progress, completely different information can be demonstrated reversibly, allowing data encryption and reading. The FSC-PCs with a simple quick assembly process and unique optical properties have profound potential in anti-counterfeiting and data display. Graphical abstract
研究领域:
材料科学
·
光学
·
纳米技术
·
安全技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2025
·
IF 4.7
Yang Yang,Xinru Liu,Yilin Luo,Zhipeng Fan,Xiao Ling,Shuyu Yang,Zhaomeng Liu,Xiangtai Meng,Ying Liu,Xiaohui Wang,Jinrong Bao
We report ultraviolet stimuli-responsive and transmittance-tunable films containing diphenyl sulfoxide rare earth complex for luminescence and optical anti-counterfeiting. The films are a small amount of diphenyl sulfoxide rare earth complex. The low dose of the rare earth complex still emitted strong luminescence intensity in the fibrous films. The fibrous nature of the films makes them flexible, tailorable, printability, and uniform distribution of luminescence rare earth complex, while the incorporation of PAN make the TPU film with tunable transmittance. The obtained hybrid flexible film shows strong red and green anti-counterfeiting performance under UV light stimulation due to a perfect match between the triplet energy level of DPhSO and the excited energy level of rare earth ions (Tb, Sm, Eu). Notably, the fibrous films offer multiple anti-counterfeiting modes, providing a range of verification options. This work demonstrated a low-cost and effective way to prepare anti-counterfeiting film, making them highly promising for practical anti-counterfeiting applications.
研究领域:
材料科学
·
高分子科学
·
光学工程
·
纳米技术
·
安全技术
✓ 已验证
产品关联
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2025
·
IF 6.3
Yuedan Wang,Mengjie Li,Yun Lin,Anqi Li,Changhui Li,Mufang Li,Wenwen Wang,Qiongzhen Liu,Dong Wang
In this paper, a high-performance photochromic system with rapid fading was constructed by adjusting the pH of tungstate, introducing dopants, reducing agents and polydimethylsiloxane (PDMS) coatings. In addition, the chromaticity of photochromic materials can be precisely controlled by changing the doping and reducing agent content. Continuous large-scale fabrication of novel photochromic fiber/fabric using dip coating and wet spinning has been proposed. The photochromic fibers/fabric exhibit significant color contrast (ΔE = 40.2), rapid color switching (5 s), fast fading time (10 min), good cycling stability (20 times), as well as long color-retention (7 days) under UV/visible light irradiation. Photochromic fibers after packaging with PDMS have excellent water resistance and maintain good photochromic properties even after washing (20 cycles) when exposed to water, ethanol, and detergent solutions. The photochromic fibers can be used as wristbands or embroidered on various textiles as wearable UV indicators. With the increase of UV dose, it has real-time and sensitive color rendering, which provides early warning for high dose UV radiation. The color-changing mechanism of photochromic fabric has been studied. In addition, photochromic solution has fast UV response and fading ability, which can realize the application of rewritable ink, color-changing film. Notably, its preparation process has the advantages of low cost, environmental friendliness and large-scale production, providing a new solution for smart sensing and anti-counterfeiting application.
研究领域:
材料科学
·
纺织工程
·
功能高分子材料
·
智能传感
·
光化学
·
纳米复合材料
·
环境响应材料
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）