Materials Literature
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When 2D materials with different lattice constants or lattice rotation angles are stacked together, a periodic moiré pattern will appear. Such moiré superlattice introduces a new two dimensional periodic potential, which can greatly change the physical properties of the original systems. Recent experimental studies of…
a 230031) ( b 230026) ( c 230031) , . , (Surface-enhanced Raman scattering, SERS) Hg 2 . "turn-off", Fe 3 O 4 @Ag (FA) Hg 2 SERS . , SERS . (PDADMAC,
Abstract The structural details of cellulose I β were discussed according to molecular dynamics simulations with the GLYCAM-06 force field. The simulation outcomes were in agreement with previous experimental data, including structural parameters and hydrogen bond pattern at 298 K. We found a new conformation of cellu…
A new kind of Al photoanode composite based on photocatalytic material and sacrificial anode was proposed and designed to provide new ideas for cathodic protection in marine environment. Fabricated with the traditional Al-Zn-In-Mg-Ti sacrificial anode and Co(OH) 2 modified anatase TiO 2 nanotubes, a new Al photoanode…
LaMnO<sub>3</sub> is one of the most intensively studied cathode materials for solid oxide fuel cell (SOFC). In the present study, LaMnO<sub>3-d</sub>, cathode materials were synthesized by combustion method. The properties of synthesized materials like thermal, structural, electrical and electrochemical were investig…
Near-field electrospinning direct writing of array-nozzle is an efficient method for preparing large-area aligned fibers. However, electric field between the array-nozzle interferes with the stability and uniformity of near-field electrospinning, and little research has been done in this field. To clarify the electric…
Steel‐concrete composites are important armor protective materials with the increasing power of precision‐guided weapons. In this study, the formula of residual velocity as well as the ratio between residual and initial kinetic energy ( E r / E 0 ) for concrete targets with a rear steel liner was derived. By establish…
-TPR), high-resolution transmission electron microscopy (HR-TEM), and energy dispersive spectroscopy (EDS) mapping. The results show that the synthesis methods greatly influence the catalytic performance of catalysts. The Fe-Ce-Al-P catalyst prepared by the co-precipitation method yields the highest catalytic performa…
Greater interest in recent years to the increase demand in using natural fiber reinforcement of polymers is to comply with the increasing stringent international protocols related to climate change and environmental awareness. Many studies have reported the development of renewable and biodegradable agricultural by-pr…
A series of poly(1,3-trimethylene carbonate- <italic>b</italic> -( <sc>l</sc> -lactide- <italic>ran</italic> -glycolide)) (PTLG) with the three-armed PDLA and PLLA stereoblock copolymer (sc-PLA) acting as the nucleating agent was prepared <italic>via</italic> the solution-casting method.
The alkyl chain carrying ligands N,N-di(pyridin-2-yl)butanamide (LC4) and N,N-di(pyridin-2-yl)decanamide (LC10) were combined with NCS- co-ligands to form the neutral heteroleptic Fe(ii) complexes trans-[FeII(LC4)2(NCS)2] (1C4) and trans-[FeII(LC10)2(NCS)2] (1C10). Variable temperature crystallographic studies reveale…
We report the synthesis, crystal structures and physical properties of three quaternary compounds CsLiCrSe2, RbLiCrS2 and CsLiCrS2, which represent the first discovered ThCr2Si2-type chromium chalcogenides. They all share the same structure with the space group I4/mmm and Cr/Li mixed occupancy without ordering. Specif…
In this present work, we study the structural, microstructural, electronic and magnetic properties of Gadolinium Molybdate (Gd2MoO6) compound synthesized via solid statereactionmethod. The single-phase nature of the compound is confirmed using x-ray diffraction (XRD) technique and the structure is refined to monoclini…
M, which is 100-fold improvement compared to AuFON substrate or Au@Ag NPs. The excellent signal enhancement originates from the hotspot improvement and densification, as visualized by the FDTD calculations. Additional hotspots were created at the gaps between the Au@Ag NPs and the AuFON, thus improving the density of…
Influence of A-site deficiency and chemical composition of B-site (concentration of Ni, Mn, and Cr) on electrochemical performance of hydrogen electrode in (La 1-x Sr x ) y Cr 0.5-z Mn 0.5-w Ni z+w O 3-δ |(Sc 2 O 3 ) 0.10 (CeO 2 ) 0.01 (ZrO 2 ) 0.89 |La 0.8 Sr 0.2 FeO 3-δ reversible solid oxide fuel cell has been stud…
-PDA/ODA/BIA molar ratio of 2/4/4, which showed a higher degree of orientation and the highest crystallinity, and the strength further increased on increasing the thermal drawing ratio. X-ray diffraction indicated that the fibers exhibited highly ordered structures, while two-dimensional wide angle X-ray diffraction s…
s of the poly(sulfonic acid)s and, therefore, decrease the net charge of these polymers. It is shown that while poly(styrene sulfonic acid) (PSSA) and Nafion form IPCs with PEO, poly(vinyl sulfonic acid) (PVSA) does not. This result is explained in terms of the hydrodrophobic nature of PSSA and Nafion, which stabilize…
The effect of hydrochloric acid treatment on Ce-Ti oxides was investigated for selective catalytic reduction of NO with NH3. The results showed that hydrochloric acid treatment had a positive effect on the low-temperature activity of Ce-Ti oxides. The improved activity of Ce-Ti oxides could be attributed to the increa…
摘要： 汽车制动盘的工作温度高、易产生热疲劳，其性能直接影响行车安全，对高温下制动盘的热疲劳裂纹萌生寿命的研究十分必要。首先研究取自汽车制动盘上的灰铸铁HT200试样在500℃下单调拉伸与压缩的性能，对应力—应变曲线进行分析，得到其力学性能参数；接着基于这些参数，对初始温度为400℃时的制动盘在单次紧急制动工况下进行热-结构耦合仿真分析，得到制动盘的温度场和应力场分布；最后利用应变疲劳的方法根据Miner线性累积损伤理论研究500℃下灰铸铁HT200的塑性特性对制动盘热疲劳裂纹萌生寿命的影响。研究结果表明：制动过程中的热应力远大于机械应力，是产生疲劳裂纹的主要原因；高温下制动盘材料HT200的塑性特性对制动盘热疲劳裂纹萌生寿命的影…
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