RSC Advances
·
2021
·Vol. 11
·期 34
·20760-20768
·
IF 3.361
Yue Hu,Salah Ahmed Sarhan Al-Shujaa,Bin Zhen,Yaping Zhang,Xianggao Li,Yaqing Feng
Electrophoretic display (EPD) is a type of flexible display which has attracted wide attention. In this work, blue nanosized crystals of cobalt aluminum oxide (CoAl2O4) were precipitated on silica nanoparticles, and then the nanocomposites were coated with an ionic liquid polymer (PIL) to give blue electrophoretic particles. The blue nanocomposites (SCAs) formed possess an excellent spherical structure, and the average diameter is about 188 nm. The porous silica matrix presents a relative light density, and the blue CoAl2O4 pigment offers excellent color. The outside ionic liquid polymer supplies the PIL/SCAs with a light density of 1.7915 g cm−3, excellent hydrophobicity and dispersion stability in the electrophoretic liquid. The fabricated single-particle EPD prototypes show a response time of 165 ms in the EPD cell with a 0.2 mm thickness, which is much faster than the commercial EPDs, and this is probably because of the unique composite structure.
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International Journal of Astrobiology
·
2021
·Vol. 20
·期 2
·159-177
·
IF 1.673
Binod Prasad,Peter Richter,Nithya Vadakedath,Ferdinand W. M. Haag,Sebastian M. Strauch,Rocco Mancinelli,Achim Schwarzwälder,Emmanuel Etcheparre,Nicolas Gaume,Michael Lebert
The unique environment of space is characterized by several stress factors, including intense radiation, microgravity, high vacuum and extreme temperatures, among others. These stress conditions individually or in-combination influence genetics and gene regulation and bring potential evolutionary changes in organisms that would not occur under the Earth's gravity regime (1 × g). Thus, space can be explored to support the emergence of new varieties of microbes and plants, that when selected for, can exhibit increased growth and yield, improved resistance to pathogens, enhanced tolerance to drought, low nutrient and disease, produce new metabolites and others. These properties may be more difficult to achieve using other approaches under 1 × g. This review provides an overview of the space microgravity and ionizing radiation conditions that significantly influence organisms. Changes in the genomics, physiology, phenotype, growth and metabolites of organisms in real and simulated microgravity and radiation conditions are illustrated. Results of space biological experiments show that the space environment has significant scientific, technological and commercial potential. Combined these potentials can help address the future of life on Earth, part of goal e of astrobiology.
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Laser & Photonics Reviews
·
2022
·Vol. 16
·期 7
·2200012
·
IF 10.947
Hao Suo,Yu Wang,Xiaoqi Zhao,Xin Zhang,Leipeng Li,Kuiwen Guan,Wenge Ding,Panlai Li,Zhijun Wang,Feng Wang
The rapid development of near-infrared (NIR) spectroscopic techniques has greatly stimulated the discovery of novel broadband NIR-emitting phosphors as advanced light sources. Herein, a novel double-perovskite phosphor La 2 MgHfO 6 :Cr 3+ /Yb 3+ that displays ultra-broadband NIR emissions with a full-width at half maximum (FWHM) of 333 nm is reported. The remarkable luminescence property stems from the multiple crystallographic sites, relatively weak crystal field, and efficient Cr 3 -to-Yb 3+ energy transfer (ET). The site occupation of Cr 3+ is elaborately verified by the Rietveld refinement and first-principles calculation. By controlling the ET process, the internal/external quantum efficiency (IQE/EQE), bandwidth, and thermal stability of NIR emissions are substantially improved. The as-prepared phosphors are further integrated into a miniaturized NIR light-emitting diode (LED) package, demonstrating superior performance in rapid nondestructive detection of structural failure in thin electronic cables. The results described here provide a novel pointcut for designing broadband NIR-emitting phosphors with desired optical properties toward applications in industrial inspection and medical diagnosis.
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ACS Applied Energy Materials
·
2022
·
IF 6.959
Zhiwen Wang,Chuanrui Zhang,Jun Zhang,Jia liang,Zhenguo Liu,Fengling Hang,Yuxue Xuan,Xia Wang,Mengran Chen,Shaowen Tang,Peng-an Zong
Construction of an inorganic/organic superlattice-based film has been proven effective in enhancing thermoelectric (TE) performance as well as flexibility by a variety of mechanisms, typically for two-dimensional (2D) TiS2-based flexible TEs. MXenes, typically, Ti3C2Tx, are a type of 2D material widely investigated in fields of flexible batteries and electromagnetic shielding, among others. However, they have rarely been reported in flexible TEs. One of the key factors is that the surface termination groups (−T) on an MXene could trap electrons, restricting the electronic transport. Herein, −T groups were tailored and substituted by organic ions (−HA) by facile preannealing, exfoliation, and reassembly. The intercalation of −HA introduced Ti–N bonding, forming a flexible MXene/organic superlattice film. The electrical conductivity of the superlattice film was increased by 5 times to 1.6 × 105 S m–1 due to defect reduction as well as the electron injection effect. While the Seebeck coefficient was maintained, the power factor was increased from 4 to 18 μW m–1 K–2. The TE module based on the superlattice film revealed an output power of 7.6 nW at a temperature gap of 50 K. This work opens up an avenue of fabricating flexible MXene-based TE films by tailoring the surface termination group and constructing inorganic/organic superlattice structures.
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International Journal of Electrochemical Science
·
2023
·
IF 1.5
Feng Yang,Jiayu Wei,Shihui Qiu,Chengbao Liu,Li Cheng,Haichao Zhao
The corrosion inhibition effect of polylevodopa (poly-(L-DOPA)) on Q235 carbon steel in 1 M HCl was studied owing to its low cytotoxicity and special structure. Electrochemical measurements show that the corrosion inhibition efficiency increases with the increase of poly-(L-DOPA) concentration and the immersion time. When the concentration of poly-(L-DOPA) is 300 mg/L, the corrosion inhibition efficiency can reach 97%. Confocal laser scanning microscopy (CLSM) and field emission scanning electron microscope (FESEM) proved that poly-(L-DOPA) has a good corrosion inhibition effect on Q235 carbon steel immersed in 1 M HCl. Poly-(L-DOPA) adsorbs on the surface of Q235 carbon steel to form a protective film, and followed the Langmuir adsorption isotherm.
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ULTRASONICS SONOCHEMISTRY
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2012
·
IF 3.567
Mi-mi Tao,Fu Liu,Li-xin Xue
Poly(vinylidene fluoride) (PVDF) membranes were prepared by an ultrasound assisted phase inversion process. The effect of ultrasonic intensity on the evolution of membrane morphology with and without the addition of pore former LiCl during precipitation process was comprehensively investigated. Besides the inter-diffusion between the solvent and nonsolvent, the ultrasonic cavitation was thought to have significant influences on phase inversion and the resultant membrane morphology. The mutual diffusion between water and solvent during the ultrasound assisted phase inversion process was measured. The crystalline structure was detected by wide angle X-ray diffractometer (WAXD). The thermal behavior was studied by differential scanning calorimeter (DSC). The mechanical strength, forward and reverse water flux, rejection to bovine serum albumin (BSA) and pepsin were also investigated. By the ultrasound assisted phase inversion method, ultra-filtration membrane was successfully prepared, which exhibited more preferable morphology, better mechanical property and more favorable permeability without sacrificing the rejection and thermal stability.
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DALTON TRANSACTIONS
·
2017
·Vol. 46
·期 7
·2310-2321
·
IF 4.029
Lianwei Shan,Yuteng Liu,Hongtao Chen,Ze Wu,Zhidong Han
We prepared an α-Bi2O3/BiOBr core–shell heterojunction via a facile in situ chemical transformation method. Ultrathin BiOBr nanosheets were observed and these were found to be evenly distributed on the surface of α-Bi2O3/BiOBr by SEM and TEM. The results revealed that the prepared α-Bi2O3/BiOBr photocatalysts were porous, and their specific surface areas were found to be raised on comparing with α-Bi2O3 and BiOBr. In our experiments, the photocatalytic activity of α-Bi2O3 was obviously enhanced when assembling with ultrathin BiOBr compared with α-Bi2O3/BiOBr and the individual phase. It is considered that the surface porous structure increases the specific surface areas, which improved the adsorption characteristics of α-Bi2O3/BiOBr. The suitable band alignment (between α-Bi2O3 and BiOBr) and oxygen vacancy effect can be attributed to the increased photocatalytic activity under visible irradiation.
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ORGANIC LETTERS
·
2019
·
IF 6.555
Qian Xiong,Gonglin Li,Shunxi Dong,Xiaohua Liu,Xiaoming Feng
Catalytic asymmetric synthesis of hydrothiazole derivatives was developed via a well-organized formal [2 + 1 + 2] cycloaddition reaction triggered by asymmetric addition of isocyanide to alkylidene malonate. Various chiral hydrothiazole derivatives were readily provided in good yield with high enantioselectivity (up to 98% yield, 98.5:1.5 er) utilizing a chiral Mg(OTf)2/N,N′-dioxide complex as the catalyst under mild conditions. Based on the experimental studies and the structure of the catalyst, a possible catalytic cycle was proposed to elucidate the reaction process and activation mode.
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MATERIALS LETTERS
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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.
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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.
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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.
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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.
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危险品化学品经营许可证（带存储）