ACS Photonics
·
2025
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IF 6.7
Zexi Lin,Wenxiao Zhao,Xing Lin,Liyan Zhang,Jiaqi Gao,Sheng Xu,Enguo Chen,Tailiang Guo,Yun Ye,Huipeng Chen
Neuromorphic vision systems have the capacity to simulate the perception and processing of visual information by visual cells in the retina. However, when confronted with the challenges posed by a substantial volume of complex data and complex environments, traditional neuromorphic vision systems are unable to handle redundant signals of overenhancement and suppression. These systems are required to face the considerable challenges posed by complicated circuits and algorithms. In this paper, we present an adaptive synaptic transistor with a built-in heterojunction that can switch between three modes of synaptic excitation-inhibition effect, excitation-adaptive, and inhibition-adaptive photoconductivity effect by utilizing light switching and wavelength change. The device can complete the entire adaptation process from excitation sensitization to self-adaptation to the initial current in 1 s, and from excitation sensitization to adaptation in 3.2 s. The adaptation speed is superior to that of the human eye (5 min). The combination of convolutional neural networks (CNNs) with adaptive synaptic transistors has yielded the development of an advanced neuromorphic vision system. This system exhibits fast self-adaptation and static image recognition and classification capabilities, with a recognition rate that exceeds 90%, thereby facilitating the advancement of next-generation neuromorphic vision systems.
研究领域:
神经形态工程
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光电子学
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人工智能
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神经网络
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传感器技术
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 38
·20414-20423
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IF 14.511
Huanhuan Sun,Wei Hua,Shiyu Liang,Yueying Li,Jian-Gan Wang
Constructing a semiconductor–liquid junction (SCLJ) with efficient charge transfer and excellent anti-photocorrosion is crucial yet challenging for photoelectrochemical (PEC) water oxidation. Herein, we propose an effective surface reconstruction strategy to create a self-adaptive SCLJ for significantly enhancing the PEC activity and stability of BiVO4 photoanodes. It is revealed that a low-valence metal oxide (e.g., NiFeOx) serrated cocatalyst could be in situ transformed into a uniform and seamless oxygen-vacancy-rich metal (oxy)hydroxide nanolayer during the initial PEC test cycles. Such an intriguing reconstruction creates a self-adaptive SCLJ to promote hole trapping/migration at the semiconductor/cocatalyst junction and improve the water oxidation kinetics as well as photocorrosion resistance at the electrode/electrolyte interface. Remarkably, the self-adaptive SCLJ enables BiVO4 to show an impressive photocurrent density of 5.1 mA cm−2 at 1.23 V vs. RHE and superior working durability over 30 h. This study provides a fundamental insight on designing a self-adaptive SCLJ for highly efficient PEC water electrolysis.
研究领域:
材料科学
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电化学
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可再生能源
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产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2022
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IF 10.723
Leyi Lin,Zhiping Su,Haishan Zhang,Guowen Zhou,Haonan Zhou,Junli Ren,Xiaoying Wang,Chuanfu Liu,Xiaohui Wang
The increasing environmental burden generated by disposable plastic wastes makes the development of sustainable substitute materials an emergent task. As one of the most abundant bioresources, chitosan (CS) has been considered as a potential candidate for plastic substitution. Conventionally, CS-based materials are fabricated through a solution-processing procedure due to the high crystallinity of CS. Herein, we designed a CS-based material via integrating CS into the network of polyimine (PI), which shows thermomechanical processability similar to plastics. Strong interactions were achieved through dynamic imine bond and hydrogen bond and thus formed a thermo-processable dynamic composite network. These CS-based plastic substitutes exhibit exceptional mechanical performances, excellent thermal/chemical stability, and a series of self-adaptiveness, including re-healing, reprocessing and multi-layer laminating. Notably, CPs can be easily degraded and 100% recycled for the production of next-generation materials. This work provides an alternative route to produce green and sustainable biomass materials as a plastic substitute.
研究领域:
材料科学
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生物工程
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环境科学
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产品关联
DOI
PubMed
高影响因子
Nano-Micro Letters
·
2024
·Vol. 17
·期 1
·1-17
·
IF 31.6
Zhang Chaoran,Gu Yichuan,Jiang Qu,Sheng Ziyang,Feng Ruohan,Wang Sihong,Zhang Haoyue,Xu Qianqing,Yuan Zijian,Song Fang
Structural reconstruction of electrocatalysts plays a pivotal role in catalytic performances for CO 2 reduction reaction (CO 2 RR), whereas the behavior is by far superficially understood. Here, we report that CO 2 accessibility results in a universal self-adaptive structural reconstruction from Cu 2 O to Cu@Cu x O composites, ending with feeding gas-dependent microstructures and catalytic performances. The CO 2 -rich atmosphere favors reconstruction for CO 2 RR, whereas the CO 2 -deficient one prefers that for hydrogen evolution reaction. With the assistance of spectroscopic analysis and theoretical calculations, we uncover a CO 2 -induced passivation behavior by identifying a reduction-resistant but catalytic active Cu(I)-rich amorphous layer stabilized by *CO intermediates. Additionally, we find extra CO production is indispensable for the robust production of C 2 H 4 . An inverse correlation between durability and FE CO /FE C2H4 is disclosed, suggesting that the self-stabilization process involving the absorption of *CO intermediates on Cu(I) sites is essential for durable electrolysis. Guided by this insight, we design hollow Cu 2 O nanospheres for durable and selective CO 2 RR electrolysis in producing C 2 H 4 . Our work recognizes the previously overlooked passivation reconstruction and self-stabilizing behavior and highlights the critical role of the local atmosphere in modulating reconstruction and catalytic processes.
研究领域:
材料科学
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电化学
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催化反应
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产品关联
DOI
PubMed
高影响因子
Polymers
·
2023
·Vol. 15
·期 24
·4632
·
IF 5
Huimei Wu,Yishan Lou,Zhonghui Li,Xiaopeng Zhai,Fei Gao
To meet the escalating demand for oil and gas exploration in microporous reservoirs, it has become increasingly crucial to develop high-performance plugging materials. Through free radical grafting polymerization technology, a carboxymethyl chitosan grafted poly (oligoethylene glycol) methyl ether methyl methacrylate acrylic acid copolymer (CCMMA) was successfully synthesized. The resulting CCMMA exhibited thermoresponsive self-assembling behavior. When the temperature was above its lower critical solution temperature (LCST), the nanomicelles began to aggregate, forming mesoporous aggregated structures. Additionally, the electrostatic repulsion of AA chains increased the value of LCST. By precisely adjusting the content of AA, the LCST of CCMMA could be raised from 84.7 to 122.9 °C. The rheology and filtration experiments revealed that when the temperature surpassed the switching point, CCMMA exhibited a noteworthy plugging effect on low-permeability cores. Furthermore, it could be partially released as the temperature decreased, exhibiting temperature-switchable and self-adaptive plugging properties. Meanwhile, CCMMA aggregates retained their reversibility, along with thermal thickening behavior in the pores. However, more detailed experiments and analysis are needed to validate these claims, such as a comprehensive study of the CCMMA copolymer’s physical properties, its interaction with the reservoir environment, and its performance under various conditions. Additionally, further studies are required to optimize its synthesis process and improve its efficiency as a plugging material for oil and gas recovery in microporous reservoirs.Keywords:temperature-switchable;intelligent fluid;adaptive;rheological properties;filtration loss
研究领域:
材料科学
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石油工程
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产品关联
DOI
PubMed
高影响因子
Nano Energy
·
2024
·
IF 16.8
Shangjing Li,Erqi Yang,Yiyi Li,Xiwei Mo,Zewen Chen,Zhengui Zhou,Guangming Tao,Yi Long,Bin Hu
Effective management of both near-infrared (NIR) radiation and long-wavelength infrared (LWIR) thermal emission through window design holds tremendous promise for achieving carbon neutrality in the building sector. Compared to the traditional static low emissivity (Low-E) and solar regulating windows, emerging emissivity-altering windows can better adapt to varied weather. However, dynamic windows with self-adaptive solar radiation and emissivity control have long been challenging, primarily due to the intricate broadband spectrum manipulation requiring sophisticated material design. Herein, by employing the NIR transparent hydrogen-doped In 2 O 3 (IHO) as a function layer ( ε = 0.13, T NIR = 79.8 %), we present a broadband self-adaptive radiative thermal management (SRTM) window based on Fabry-Perot resonator. Compared to the common tin-indium oxide (ITO)-based counterpart, the IHO-based SRTM window shows a 70 % enhancement in NIR power regulation ability (10.9 %) with remaining emissivity regulation ability (0.26). It contributes significantly to energy conservation offering an annual energy saving and equivalent CO 2 emissions reduction of up to 20 % (411 MJ·m −2 ) and 244 tons/yr, compared to traditional Low-E windows globally.
研究领域:
材料科学
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建筑技术
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能源工程
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DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Ya-Nan Wu,Hai-Bo Zhao,Ming-Jun Chen,Lei He,Dan-Xuan Fang,Shuai-Qi Guo,Fu-Rong Zeng,Yu-Zhong Wang
Semi-rigid polyurethane foams (SPUF) with high deformation resistance and strength are indispensable for cushioning applications. However, for high fire risk and cascaded pollutant effects, overused multifarious additives and foam wastes exacerbate global environmental concerns. One option to address this issue is to develop eco-friendly multifunctional flame retardants that participate in the material lifecycles of preparation, safe service, waste management, and sustainable recycling. Herein, a novel self-adaptive catalytic strategy is reported that exploits the temperature and agent structure-responsive catalytic ability of eco-friendly sodium propionate (SP), reconciling the often-conflicting properties of fabrication and recycling while effectively mitigating combustion risks and additive pollution. The adaptive catalytic function of SP impressively involves all aspects of foam life cycles: 1) catalyzing foaming without complex/hazardous catalysts; 2) providing superior flame-retardant efficiency with a high limiting oxygen index of 25.5% without relying on traditional flame retardants; 3) promoting in situ network fragmentation and reorganization into strong adhesives (5.8 MPa); and 4) further recycling of the newly formed adhesives in a self-driven sustainable manner. A novel green strategy is presented that addresses fire hazards, plastic pollution, and the unsustainability of recycling, minimizing the ecological risks of foam, which will positively impact future sustainable material design involving diverse additives.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Chunyan Tang,Jiayan Pan,Jiayue Wu,Xingwang Zhao,Jinglei Lei,Lingjie Li,Fusheng Pan
Magnesium alloys have promising application prospects in aeronautical and aerospace fields, but are susceptible to performance damage. Therefore, it is of great significance to construct surface coatings with surroundings-adaptability to endow magnesium alloys with robustness in harsh environment. Herein, a rare-earth-coating with surroundings-adaptability was prepared on AZ31 magnesium alloy by chemical conversion and stearic-acid modification. The as-constructed coating is composed of the micro-nano-structured lanthanum/magnesium stearate, which is superhydrophobic with a water contact angle of 154.5°. The coating can reduce the i corr value of magnesium alloy by two orders of magnitude. The as-coated sample demonstrates extraordinary self-cleaning performance and strong resistance to various mechanical (tape peeling, friction/wear, sand/rain impact, ultraviolet irradiation) and chemical (acid/salt/alkali, organic solvent , corrosive medium) damage, showcasing remarkable surroundings-adaptability. Such surroundings-adaptability is resulted from the durable superhydrophobicity of the coating, which reduces the contact area between the coating and the harmful mediums. The surroundings-adaptive coating enables robustness of magnesium alloys in harsh environment, which can promote their wide applications in aeronautics and aerospace.
研究领域:
材料科学
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表面工程
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产品关联
DOI
高影响因子
ACS Nano
·
2023
·
IF 17.1
Leilei Liang,Ruoling Yu,Samuel Jun Hoong Ong,Yi Yang,Baoshan Zhang,Guangbin Ji,Zhichuan J. Xu
Mechano-optical systems with on-demand adaptability and a broad spectrum from the visible to microwave are critical for complex multiband electromagnetic (EM) applications. Most existing material systems merely have dynamic optical or microwave tunability because their EM wave response is strongly wavelength-dependent. Inspired by cephalopod skin, we develop an adaptive multispectral mechano-optical system based on bilayer acrylic dielectric elastomer (ADE)/silver nanowire (AgNW) films, which reconfigures the surface morphology between wrinkles and cracks via mechanical contraction and stretching. Such morphological evolution regulates the direct transmission/reflection and scattering behavior of visible–infrared light and simultaneously alters the conductive network in a AgNW film to influence its microwave characteristics. The designed system features switching between visible–infrared–microwave transparency and opacity, continuous regulation, wide spectral window (0.38–15.5 μm and 24,200–36,600 μm), excellent recyclability (500 times), and rapid response time (<1 s). These grant the system great potential as platforms for various promising applications such as smart windows, switchable EM devices, dynamic thermal management, adaptive visual stealth, and human motion detection.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Dong Wang,Jingfang Li,Xiaohui Sun,Jianghua Hu,Xueqiang Tan,Qi Jia,Jun Liu,Xuyang Zhang,Guohua Wu,Xiangwei Wang
Electric field responsive photonic crystals take on critical significance in developing adaptive camouflage technology, which are promising materials for adaptive camouflage devices with better fabrication processes and color saturation. However, electric field responsive photonic crystals are primarily susceptible to poor fusion with typical background colors and necessitate the continuous implementation of electric fields to attain specific colors, thus limiting their practical applications. Monodisperse polyvinylpyrrolidone modified cadmium sulfide (PVP/CdS) microspheres with large refractive index are well prepared in this study. Liquid photonic crystals, exhibiting earth-yellow and light green under specific electric field, are obtained with PVP/CdS particles dispersed in propylene carbonate in accordance with the subtractive color mixing principle of structural color and initial color. The resulting electric field responsive photonic crystals are characterized by a simple preparation process, fast electrical response, long-time holding of the earth-yellow state, and reversible color changes between earth-yellow and light green in −3.5 V and + 3.5 V electric field switching. This study can contribute to the development of color-changing devices designed for adaptive camouflage applications.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2021
·
IF 6.165
Quan Hu,Liying Bin,Ping Li,Fenglian Fu,Guoqing Guan,Xiaogang Hao,Bing Tang
The study prepared a self-adaption adsorbent that was capable of removing anionic dye over a wide range of pH value and revealed its essential adsorption mechanism to the conventional dyes as target pollutants. Through a cross-linking/embedding method, MgO particles were successfully combined with magnetic substances and Chitosan, which created a novel magnetic adsorbent (named as MgO-MCS) that could be used to efficiently remove anionic dyes by self-adjusting its surface charge. A series of characterization techniques and adsorption experiments were conducted to reveal the properties and the adsorption mechanisms, whose results showed that MgO-MCS had a better adsorption effect, and wider application range than that of magnetic Chitosan (MCS). The enhancement of adsorption was attributed to the formed more micropores and mesopores on the surface of MgO-MCS, and the essential mechanism was mainly caused by the combined effects of van der Waals force, electrostatic interaction and hydrogen bond .
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·
IF 19
Jinquan Liu,Liangliang Xu,Qixiao Ji,Longfei Chang,Ying Hu,Qingyu Peng,Xiaodong He
Phototropism and self-oscillation are both self-regulating intelligent movements of biological organisms. However, realizing these intelligent movements in one same artificial actuation system remains a great challenge. Here, by introducing dynamic light-mechanical interaction, a MXene-based actuator is designed and fabricated that can generate unique self-adaptive light-driven actuation from the equilibrium state of phototropic deformation to self-oscillation. The actuator can autonomously track the incident light, showing a sunflower-like phototropism. Moreover, by simply installing a load on the actuator to induce self-shadowing-enabled negative feedback loop, it can carry the load to continuously oscillate under constant light irradiation, with a frequency of 6.5 Hz, an amplitude of 2.6 mm, and a load-to-weight ratio value of 4.7. The oscillation frequency and amplitude can be further adjusted by the incident light power, actuator length, and weight of the installed load. This oscillator can serve as an intelligent light-powered motor platform. By installing diverse accessories with different functions on the oscillator, it can realize various applications, including information transmission, light-induced power generation, bionic motions, and multi-mode intelligent switches. These results provide a simple and versatile strategy for designing a self-adaptive oscillator driven by light and show the prospect of the oscillator in light-powered engines and smart machinery systems.
研究领域:
材料科学
·
智能系统
·
仿生学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）