Science Advances
·
2022
·Vol. 8
·期 43
·
IF 14.957
Shanshan Zhu,Yuanheng Li,Huoerhute Yelemulati,Xinping Deng,Yongcheng Li,Jingjing Wang,Xiaojian Li,Guanglin Li,Paschalis Gkoupidenis,Yanlong Tai
Flexible tactile neuromorphic devices are becoming important as the impetus for the development of human-machine collaboration. However, accomplishing and further transcending human intelligence with artificial intelligence still confront many barriers. Here, we present a self-powered stretchable three-dimensional remote tactile device (3D-RTD) that performs the depth-of-field (DOF) sensation of external mechanical motions through a conductive-dielectric heterogeneous structure. The device can build a logic relationship precisely between DOF motions of an external active object and sensory potential signals of bipolar sign, frequency, amplitude, etc. The sensory mechanism is revealed on the basis of the electrostatic theory and multiphysics modeling, and the performance is verified via an artificial-biological hybrid system with micro/macroscale interaction. The feasibility of the 3D-RTD as an obstacle-avoidance patch for the blind is systematically demonstrated with a rat. This work paves the way for multimodal neuromorphic device that transcends the function of a biological one toward a new modality for brain-like intelligence.
研究领域:
神经形态工程
·
人机交互
·
柔性电子学
·
触觉传感
·
人工智能
·
仿生机器人
✓ 已验证
DOI
高影响因子
MATERIALS LETTERS
·
2019
·
IF 3.019
Meihua Fang,Jinpeng Lv
Passive thermal control coatings (TCCS) have been widely used to tune the thermal equilibrium of spacecraft. However, the performance of such coatings undergoes serious degradation due to the intensive UV absorption and the radiation damage of the pigments. We developed a Zn 2 SiO 4 pigment with a solar absorptance (α s ) as low as 0.078, which shows a distinctly high reflectance in the whole solar-radiation spectrum, especially in the high energy UV wavebands. Furthermore, after performing proton irradiation , the α s of ZnO, ZnTiO 3 pigments increase from 0.153 and 0.101 to 0.277 and 0.521, respectively, while Zn 2 SiO 4 rises to 0.212, which exhibits remarkable radiation resistance. We evidenced that Zn 2 SiO 4 pigments will not only significantly boost the performance of thermal control coatings but also be beneficial for UV shielding applications.
研究领域:
材料科学
·
航天器热控制
·
颜料化学
·
辐射效应
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 11
·7085-7093
·
IF 12.732
Zhaoyang Sun,Lanlan Feng,Chengdong Xiong,Xinyang He,Liming Wang,Xiaohong Qin,Jianyong Yu
Moist-electric generators (MEGs) that can directly harvest electricity from ubiquitous moisture are some of the most fascinating and promising candidates to supply renewable and clean power for next-generation portable electronics. However, the lack of necessary wearable properties such as air permeability and comfort, low voltage output and complicated fabrication processes of current MEGs have severely hindered their practical application. Herein, we for the first time demonstrate a breathable, flexible, deformable, large-area and easily fabricated electrospun nanofiber fabric as an efficient MEG. The maximum generated voltage reaches 0.83 V, outperforming all reported polymer based MEGs. Different from past research, two electricity generation mechanisms coexist in the electrospun nanofiber fabric due to the unique porous structure with numerous micro–nano scale channels. The electricity is not only extracted from ion diffusion driven by a concentration gradient, but is also induced by the streaming current of a liquid flowing along a charged surface in solid channels. Beyond power generation, the electrospun nanofiber fabric based wearable MEGs also demonstrate successful applications in self-powered respiratory monitoring, wind speed detection and touching detection. These findings offer new insight into the future design and development of innovative and truly wearable electronics.
研究领域:
材料科学
·
能量收集
·
可穿戴技术
·
纳米技术
·
柔性电子学
✓ 已验证
DOI
高影响因子
KEY ENGINEERING MATERIALS
·
2016
·
IF 0
Shen Neng Huang,Xin Du Chen,Zhi Feng Wang,Jun Zeng,Fei Yu Fang,Han Wang
There are massive reports about near-field electrospinning (NFES) in the literature and the NFES has great tendency for scientific and industrial applications. It is important to improve the machining efficiency of electrospinning. Through the study of the multi-nozzle near-field electrospinning, a new method by adjusting the electrode-to-collector distance (E-C-D) is presented in this paper to make sure the jets with a straight line. The method is divided into two steps: (1) to adjust the E-C-D larger to get the jet at each nozzle, (2) to make the E-C-D smaller enough to get straight jets. Moreover, this paper simulates the electric field density which helps to provide a further understanding on the process of NFES. The experimental results contribute to making a better control on the jets in NFES.
研究领域:
材料科学
·
纳米制造
·
静电纺丝技术
·
计算仿真
✓ 已验证
DOI
Nano Research
·
2024
·Vol. 17
·期 9
·8104-8111
·
IF 9.5
Wang Yizhou,Chen Jianyu,Chen Zibo,He Qian,Tian Zhengnan,Zhao Jin,Ma Yanwen,Alshareef Husam N.
Rechargeable aqueous zinc (Zn) ion batteries (AZIBs) using low-cost and safe Zn metal anodes are considered promising candidates for future grid-scale energy storage systems, but the Zn dendrite problem severely hinders the further prospects of AZIBs. Regulating Zn depositing behaviors toward horizontal alignment is highly effective and thus has received huge attention. However, such a strategy is usually based on previous substrate engineering, which requires complex preparation or expensive equipment. Therefore, it is essential to develop a novel solution that can realize horizontally aligned Zn flake deposition via easy operation and low cost. Herein, we report an ultrathin and robust Kevlar membrane as the interlayer to mechanically suppress Zn dendrite growth. Compared to the randomly distributed flaky dendrites in the control group, the deposited Zn sheets would grow into parallel alignment with the existence of such interlayer. As the dendrites are effectively suppressed, Zn∥Cu asymmetric, Zn∥Zn symmetric, and Zn∥MnO 2 full batteries using Kevlar interlayer deliver significantly improved cycling stabilities. Furthermore, the Zn∥MnO 2 pouch cell using a Kevlar interlayer delivers stable cycling performance and shows stable operation during multi-angle folding. We believe this work provides a new possibility for regulating Zn deposition from a crystallographic perspective.
研究领域:
储能
·
材料科学
·
电化学
·
电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2019
·
IF 4.029
Daoyao Ke,Anna Jiang,Mattia Biesuz,Mauro Bortolotti,Gianmarco Taveri,Xiaoyi Wang,Ming Xu,Jiang Li,Yagang Feng,Chunfeng Hu,Salvatore Grasso
We developed Cold Isostatic Joining (CIJ) which is an environmental friendly room temperature joining method. This technique extends cold sintering process to joining of glasses. By optimizing the CIJ conditions a shear stress (18 MPa) comparable to bulk fused silica was achieved. The technique surpasses other joining methods (e.g. adhesive bonding and brazing), because it is insensitive to thermal degradation . Unlike pressure-less silicate bonding, pressure assisted CIJ resulted in a thin joining interlayer (≈27 nm) which maintained its integrity after being heated up to 1000 °C. The in-line transmittance (92%) was identical to un-joined material over the full spectrum making the joining nearly undetectable. The mechanism of CIJ formation and joining were clarified using X-ray diffraction (XRD and pole figure), scanning electron microscopy (SEM) and in line transmittance measurements. The cold joining method could find applications in the field of optics and semiconductors for wafer and lens bonding.
研究领域:
材料科学
·
光学工程
·
半导体制造
·
连接技术
·
环境友好工艺
✓ 已验证
DOI
高影响因子
CLAYS AND CLAY MINERALS
·
2024
·Vol. 66
·期 5
·415-425
·
IF 2
Honghai Wu,Zhenhao Song,Meixiang Lv,Dan Zhao,Guangping He
Many types of oxidative pollutants are dangerous chemicals and may pose a health risk, but an inexpensive and effective method for mitigating those risks would offer significant advantages. The objective of this study was, therefore, to investigate the potential for Fe-pillared montmorillonite to fill that gap. Surface mediated reduction reactions by ferrous species often play an important role in governing the transport, transformation, and fate of hazardous oxidative contaminants. Compared to the untreated montmorillonite (Mnt), the synthetic polyhydroxyl-Fe pillared montmorillonite (Fe-Mnt) was found to be somewhat similar to goethite in promoting the ability of specifically adsorbed Fe(II) to reductively transform 2-nitrophenol (2-NP). The 2-NP was efficiently removed within 30 min from solutions at the optimum neutral pH in a mixed reduction system of Fe(II)/Fe-Mnt under an anoxic atmosphere. This demonstrated that the specifically adsorbed Fe(II) of Fe-Mnt can enhance 2-NP reduction. The highly enhanced 2-NP reduction by Fe(II) through Fe-Mnt surface catalysis can, therefore, be ascribed to clearly increased amounts of an adsorbed Fe(II) species surface complex, which gave rise to enhanced Fe(II) reductive activity that enabled the rapid reduction of 2-NP. The reduction processes produced a faster transformation of 2-NP in a Fe-Mnt suspension than in a Mnt suspension. The transformation kinetics were described using pseudo-first-order rate equations. Moreover, in addition to the effects of mineral surface properties, the interactions were affected by the aqueous chemistry, and the removal rates of 2-NP were increased at pHs of 6.0–7.3. In the present study, the structure and surface reactivity of Fe-Mnt was characterized in depth. The polyhydroxyl-Fe added to Mnt and the pH were determined to be the two key controlling factors to mediate the reductive transformation of 2-NP in the presence of Fe-Mnt in comparison to goethite and Mnt. Finally, the catalysis mechanism responsible for the enhanced 2-NP reduction by Fe(II) was elucidated using cyclic voltammetry.
研究领域:
环境化学
·
催化科学
·
污染治理
·
材料化学
·
表面反应动力学
✓ 已验证
DOI
高影响因子
ACS Applied Optical Materials
·
2022
·
IF 0
Yixuan Guo,Damien Boyer,François Reveret,Federico Cisnetti,Geneviève Chadeyron,Fabrice Leroux,Yongjun Feng
Subject to the aggregation-caused quenching mechanism in the solid state, perylene and its derivatives turn out to be fascinating organic fluorophores when separated from each other by their cointercalation within a layered double hydroxide host structure. Such accommodation with surfactant spacers limits their stacking usually caused by π–π interaction between neighboring cores. For each series of fluorophores having substitution in bay or diimide positions, an optimized composition is selected based on optical performances and in particular on the absolute photoluminescence quantum yield. The optimal relative quantity of phosphor is very low from 0.001 to 0.1% of the total anionic capacity. When dispersed into a silicone matrix, the loaded films cover from green (510 nm) to red (625 nm) emission depending on the perylene derivative molecules. With loaded films overlaid on a blue chip, a warm white light (color-correlated temperature = 3890 K) with a color-rendering index as high as 91.1 is reached. In such a light-emitting diode configuration, the superposition of films for each fluorophore is preferred to the powder mixture or to the cointercalation of organic phosphors within the same structure in order to avoid too strong and nonpredictable reabsorption phenomena between emitting centers.
研究领域:
材料科学
·
有机光电子学
·
纳米化学
✓ 已验证
DOI
PROCESS BIOCHEMISTRY
·
2012
·
IF 2.627
Chao-Jun Pei,Jinhyuk Lee,Yue-Xiu Si,Sangho Oh,Wei-An Xu,Shang-Jun Yin,Guo-Ying Qian,Hong-Yan Han
We studied the inhibitory effect of gastrodin on tyrosinase using inhibition kinetics and computational simulation. Gastrodin reversibly inhibited tyrosinase in a mixed-type manner with K i = 123.8 ± 20.2 mM. Time-interval kinetics revealed the inhibition to be a first-order process with mono- and bi-phasic components. Using AutoDock Vina, we calculated a binding energy of −6.3 kcal/mol for gastrodin and tyrosinase, and we performed a molecular dynamics simulation of the tyrosinase–gastrodin interaction. The simulation results suggested that gastrodin interacts primarily with histidine residues in the active site. A 10-ns molecular dynamics simulation showed that one copper ion in the tyrosinase active site was responsible for the interaction with gastrodin. Our study provides insight into the inhibition of tyrosinase by the hydroxyl groups of gastrodin. A combination of inhibition kinetics and computational calculations may help to confirm the inhibitory action of gastrodin on tyrosinase and define the mechanisms of inhibition.
研究领域:
生物化学
·
药物化学
·
计算生物学
✓ 已验证
DOI
高影响因子
PHYTOPATHOLOGY
·
2014
·Vol. 104
·期 10
·
IF 2.746
Amara R. Dunn,Stephen R. Bruening,Niklaus J. Grünwald,Christine D. Smart
Populations of the vegetable pathogen Phytophthora capsici are often highly diverse, with limited gene flow between fields. To investigate the structure of a newly established, experimental population, an uninfested research field was inoculated with two single-zoospore isolates of P. capsici in September 2008. From 2009 through 2012, ≈50 isolates of P. capsici were collected from the field each year and genotyped using five microsatellite loci. The same two isolates were also crossed in the lab. High levels of diversity were detected in the research field, with 26 to 37 unique multilocus genotypes detected each year. Through 2012, genotypic diversity did not decline and no evidence of genetic drift was observed. However, during the 2011 and 2012 growing seasons, four new alleles not present in either parental isolate were observed in the field. Selfing (but not apomixis) was observed at low frequency among in vitro progeny. In addition, evidence for loss of heterozygosity was observed in half of the in vitro progeny. These results suggest that recombination, mutation, and loss of heterozygosity can affect the genetic structure observed in P. capsici populations.
研究领域:
植物病理学
·
遗传学
✓ 已验证
DOI
高影响因子
Polymers
·
2019
·Vol. 11
·期 4
·627
·
IF 3.164
Chuanmei Liu,Jie Liu,Xin Ning,Shaojuan Chen,Zhengqin Liu,Shouxiang Jiang,Dagang Miao
A practical method for preparing multifunctional polypropylene (PP) nonwoven fabrics with excellent stability and durability was explored. First, the PP nonwoven fabric was sputtered by a magnetron sputtering system to form an Ag film on the surface of the fabric. Subsequently, the coated fabric was treated with dopamine. The fabrics were characterized by scanning electron microscopy (SEM), an energy dispersive spectrometer (EDS), electrical conductivity, electromagnetic interference shielding effectiveness (EMI SE), antibacterial activity, stability, and laundering durability. The results of the study revealed that the fabric was coated with Ag, and after the treatment with dopamine, the surfaces of Ag-coated fibers were coated with polydopamine (PDA). The fabrics still had a sheet resistance below ~15 Ω/sq and exhibited excellent EMI SE above ~25 dB, though few differences existed from the single Ag-coated sample. After the treatment with dopamine, the antibacterial activity of the fabric was enhanced. Meanwhile, the treated samples exhibited excellent resistance against sodium sulfide corrosion, which could enhance the stability of the Ag-coated fabric. Moreover, the laundering durability of the treated fabric was improved in the same process, whose lowest sheet resistance was ~18 Ω/sq and the EMI SE was ~8 dB more than single Ag-coated PP nonwoven fabrics. In conclusion, this method was considered to be effective in fabricating multifunctional, stable, and durable fabrics.
研究领域:
材料科学
·
纺织工程
✓ 已验证
DOI
高影响因子
ACS Omega
·
2020
·
IF 2.87
Fengqing Xiong,Danni Chen,Chenglong Ma,Limei Cao,Ji Yang
Electrochemical oxidation has been considered as an efficient method to degrade pharmaceuticals and personal care products. Maintaining low power consumption while increasing the number of oxidation intermediates is deserving of exploring. Herein, Ti/SnO2–Sb/Zr0.3Ir0.7O2 was prepared by Zr doped into IrO2 and used for Sulfamethoxazole (SMX) degradation. The addition of Zr significantly increased the electrochemically active area and facilitated the catalyst to degrade SMX dramatically at a lower overpotential. The extremely outstanding lifetime of catalysts can reach 800 h during the accelerated life test, which showed excellent stability and developmental prospects. The overpotential at 10 mA·cm–2 is about 329 mV, indicating that this electrode has a high oxygen evolution reaction activity. Furthermore, the electrical efficiency per log order for the electrode is only 8.50 kW h m–3 at 4 V. Our research provides new anode electrochemical catalysts for the degradation of organic pollutants.
研究领域:
环境科学
·
材料科学
·
电化学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）