ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Rongrui Deng,Shuangshuang Tan,Zhongting Wang,Rong Li,Guanjie Lu,Baihua Qu,Le Tong,Ronghua Wang,Chaohe Xu,Guangsheng Huang,Jingfeng Wang,Aitao Tang,Xiaoyuan Zhou,Fusheng Pan
Magnesium-ion batteries (MIBs) have great potential in large-scale energy storage field with high capacity, excellent safety, and low cost. However, the strong solvation effect of Mg2+ will lead to the formation of solvated ions in electrolytes with larger size and sluggish diffusion/reaction kinetics. Here, the concept of interfacial catalytic bond breaking is first introduced into the cathode design of MIBs by hybriding MoS2 quantum dots with VS4 (VS4@MQDs) as the cathode. The “in situ dynamic catalysis and re-equilibration” effects can catalyze the Cl–Mg bond breaking and trigger single Mg2+ insertion/extraction chemistries, which can significantly accelerate the diffusion and reaction kinetics, as verified by the decreased diffusion energy barriers (0.26 eV for Mg2+ vs 2.47 eV for MgCl+) and fast diffusion coefficient. Benefitting from these dynamic catalysis effects, the constructed VS4@MQD-based MIBs deliver a high discharge capacity of ∼120 mA h g–1 at 200 mA g–1 and a long-term cyclic stability of 1000 cycles at 1 A g–1. The improved performance and detailed characterizations well prove that the active ions in MIBs change from MgCl+/Mg2Cl3+ to Mg2+ with fast kinetics.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
NATURE MATERIALS
·
2025
·Vol. 24
·期 2
·188-196
·
IF 38.5
Jiang He,Zhang Xiankun,Chen Kuanglei,He Xiaoyu,Liu Yihe,Yu Huihui,Gao Li,Hong Mengyu,Wang Yunan,Zhang Zheng,Zhang Yue
Batch production of single-crystal two-dimensional (2D) transition metal dichalcogenides is one prerequisite for the fabrication of next-generation integrated circuits. Contemporary strategies for the wafer-scale high-quality crystallinity of 2D materials centre on merging unidirectionally aligned, differently sized domains. However, an imperfectly merged area with a translational lattice brings about a high defect density and low device uniformity, which restricts the application of the 2D materials. Here we establish a liquid-to-solid crystallization in 2D space that can rapidly grow a centimetre-scale single-crystal MoS 2 domain with no grain boundaries. The large MoS 2 single crystal obtained shows superb uniformity and high quality with an ultra-low defect density. A statistical analysis of field effect transistors fabricated from the MoS 2 reveals a high device yield and minimal variation in mobility, positioning this FET as an advanced standard monolayer MoS 2 device. This 2D Czochralski method has implications for fabricating high-quality and scalable 2D semiconductor materials and devices.
研究领域:
材料科学
·
半导体技术
·
纳米技术
·
电子器件
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DOI
PubMed
高影响因子
Nanoscale
·
2018
·Vol. 10
·期 24
·11578-11584
·
IF 7.233
Qingwei Zhou,Shaoqiang Su,Pengfei Cheng,Xianbao Hu,Min Zeng,Xingsen Gao,Zhang Zhang,Jun-Ming Liu
The intrinsic magnetism of MoS2 has been extensively investigated via simulations, but few reliable experimental results have been explored. Herein, we develop zigzag-edge rich layered structural MoS2 pyramids via chemical vapor deposition, triggering exceptional ferromagnetism. The magnetic measurements revealed the robust ferromagnetism of MoS2 pyramids compared with MoS2 flakes. The existence of ferromagnetism was mostly attributed to the presence of abundant zigzag-edges in the layered pyramids, confirmed by transmission electron microscopy, vibrating sample magnetometry, and magnetic force microscopy. Moreover, a clearly identified remnant and switchable magnetic moment was revealed for the first time in the MoS2 pyramid. This study provides sound evidence with the zigzag-edge induced ferromagnetism of the MoS2 materials, promising potential magnetic and spintronic applications.
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高影响因子
Journal of Physical Chemistry C
·
2022
·
IF 4.177
Qingxuan Li,Lei Zhang,Chengyao Li,Jie He,Yifan Wei,Jinzhu Zhao,Ruili Zhang,Peng Wang,Shaojie Fu,Fei Chen,Ruwen Peng,Mu Wang
Understanding and controlling the growth morphology of two-dimensional crystals of transition metal dichalcogenides (TMDs) is essential in developing high-quality crystalline material for spintronics, valleytronics, electronics, and optics. Here we report our studies on the evolution of crystallite morphology of MoS2 observed in chemical vapor deposition. It is shown that as time goes on, the growth morphology of MoS2 flakes undergoes a transition from a triangle to a star shape, then back to a triangle, and finally to a bulgy irregular morphology. By tuning the temperature of the element sources, the atomic ratio of S and Mo on the growing interface can be adjusted. The variation of the S/Mo ratio affects the edge diffusion length and nucleation behavior on the edge of crystallite, leading to different growth morphologies. Our observations provide clues on how to engineer the morphology and control the quality of TMD crystalline sheets.
研究领域:
材料科学
·
纳米技术
·
凝聚态物理
·
晶体生长
·
二维材料
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Qingguo Gao,Lu Cheng,Shuting Wei,Wentao Zhang,Junzhou Chen,Zijian Huang,Yuehui Wang,Jianjun Yang,Ping Liu,Liming Liu
In the chemical vapor deposition (CVD) synthesis of two-dimensional materials, the meeting of crystal domains typically results in stitched grain boundaries accompanied by defects. In contrast, beyond-grain-boundary growth─where two individual domains retain their intact boundaries─is rarely observed or reported. Moreover, the large-scale synthesis of twisted transition metal dichalcogenides (TMDCs), particularly at small twist angles, is critical for advancing next-generation electronic and quantum technologies. Here, we report the beyond-grain-boundary growth of bilayer MoS2 across the full range of twist angles (0° to 60°) using a secondary sulfur supply strategy. A record lateral size of 46 μm was achieved in CVD-grown twisted TMDCs, along with a 10.4% yield of small twist angles (0°–10° and 50°–60°). For bilayer MoS2 with a twist angle of 3.4°, Moiré superlattices with a periodicity of 5.45 nm were observed. Systematic Raman and photoluminescence (PL) studies revealed significant twist-angle-dependent effects on the phonon and exciton properties. This unique growth behavior is attributed to edge structure modifications induced by an increased sulfur chemical potential. These results demonstrate an approach to synthesizing high-quality twisted 2D materials, contributing to progress in twistronics and quantum device applications.
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PubMed
高影响因子
RARE METALS
·
2023
·Vol. 42
·期 12
·3985-3992
·
IF 8.8
Yang Yang,Liang Qing-Rong,Zhu Chun-Li,Zheng Guo-Zhong,Zhang Jian,Zheng Shou-Jun,Lin Yung-Chang,Zheng De-Zhi,Zhou Jia-Dong
Van der Waals coupling with different stacking configurations can significantly affect the optical and electronic properties of ultrathin two-dimensional (2D) materials, which is an effective way to tune device performance. Herein, we report a salt-assisted chemical vapor deposition method for the synthesis of bilayer V-doped MoS 2 with 2H and 3R phases, which are demonstrated by the second harmonic generation and scanning transmission electron microscopy. Notably, the mobility of the 3R phase V-doped MoS 2 is 6.2% higher than that of the 2H phase. Through first-principles calculations, we further reveal that this particular behavior is attributed to the stronger interlayer coupling of 3R compared to the 2H stacking configuration. This research can be further generalized to other transition metal chalcogenides and will contribute to the development of electronic devices based on 2D materials in the future.
研究领域:
材料科学
·
纳米科技
·
凝聚态物理
·
二维材料
·
半导体材料
·
表面科学
·
计算材料学
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DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2023
·Vol. 25
·期 28
·18998-19003
·
IF 3.3
Guangcun Gao,Jintong Zhu,Songrui Wei,Yang Cao,Wei Huang,Zhongxin Liu,Jieqiong Wang,Yijun Shen
Monolayers of transition metal dichalcogenides (TMDCs) are atomically thin direct-bandgap semiconductors with potential applications in nanoelectronics, opto-electronics, and electrochemical sensing. Recent theoretical and experimental results have suggested that they are ideal systems for exploiting the valley degrees of freedom of Bloch electrons. Here, we report detailed studies of the opto-valleytronic properties of a chiral histidine molecule embedded in monolayer MoS2 single crystals grown via chemical vapor deposition. By irradiating MoS2 with circularly polarized light and measuring the resulting spatially resolved circularly polarized emission, we find the existence of a significantly increased circular polarization for D-histidine doped MoS2. The increased valley contrast is attributed to the selective enhancement of both the excitation and emission rates having one particular handedness of the circular polarization. These results provide a promising pathway to enhance the valley contrast for monolayer TMDCs at room temperature.
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PubMed
高影响因子
Advanced Energy Materials
·
2022
·Vol. 12
·期 11
·2103394
·
IF 29.698
Zheng Bo,Xiangnan Cheng,Huachao Yang,Xinzheng Guo,Jianhua Yan,Kefa Cen,Zhaojun Han,Liming Dai
Manufacturing electrode films at an industrial-level submillimeter thickness (≈100 µm) with superior volumetric performance is of practical significance for the commercialization of miniaturized supercapacitor systems. This work proposes a commercially scalable solvated-ion-intercalated hydrothermal strategy to demonstrate a record-high volumetric capacitance (511.29 F cm −3 ) for supercapacitors based on an industrial-level submillimeter MoS 2 film electrode (94.2 µm). The intercalated solvated Li + ions increase the amount of negative surface charge and reduce the formation energy of 1T MoS 2 , leading to a high metallic phase content of 82.7% with enhanced electrical conductivity. Together with the expanded interlayer distance (≈1.23 nm), this allows rapid electron transfer and ion transport in the excessively stacked ultrathick MoS 2 film to be simultaneously realized. Thus, the as-fabricated MoS 2 ||graphene/carbon nanotube asymmetric supercapacitor presents both high energy and power densities, outperforms those of commercial devices, including supercapacitors with submillimeter-thick electrodes and even micrometer-thick electrodes.
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高影响因子
Nanoscale Research Letters
·
2021
·Vol. 16
·期 1
·1-10
·
IF 4.703
Xu Xiaoxuan,Liu Lei
Molybdenum disulfide (MoS 2 ) has moderate hydrogen adsorption free energy, making it an excellent alternative to replace noble metals as hydrogen evolution reaction (HER) catalysts. The thickness of MoS 2 can affect its energy band structure and interface engineering, which are the avenue way to adjust HER performance. In this work, MoS 2 films with different thicknesses were directly grown on the glassy carbon (GC) substrate by atomic layer deposition (ALD). The thickness of the MoS 2 films can be precisely controlled by regulating the number of ALD cycles. The prepared MoS 2 /GC was directly used as the HER catalyst without a binder. The experimental results show that MoS 2 with 200-ALD cycles (the thickness of 14.9 nm) has the best HER performance. Excessive thickness of MoS 2 films not only lead to the aggregation of dense MoS 2 nanosheets, resulting in reduction of active sites, but also lead to the increase of electrical resistance, reducing the electron transfer rate. MoS 2 grown layer by layer on the substrate by ALD technology also significantly improves the bonding force between MoS 2 and the substrate, showing excellent HER stability.
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高影响因子
RSC Advances
·
2020
·Vol. 10
·期 35
·20579-20587
·
IF 3.119
Xiaoxuan Xu,Songlong Jiao,Zhengquan Liu,Lei Liu
A porous MoS2-polyhedral oligomeric silsesquioxane (POSS) nanohybrid was prepared from octavinyl-POSS nanoparticles and MoS2 nanosheets for the first time, the structure and composition of which were confirmed by X-ray powder diffraction (XRD), Fourier-transform infrared spectra (FTIR), scanning electron microscopy (SEM), energy dispersive spectra (EDS) and thermal gravimetric analysis (TGA). As a comparison, MoS2 nanosheets, octavinyl-POSS and MoS2-POSS nanohybrid were used as lubricating additives for liquid paraffin (LP), which decreased the friction coefficients of LP by 7.8% (MoS2), 14.1% (octavinyl-POSS), and 18.8% (MoS2-POSS). Compared with MoS2 and octavinyl-POSS, the MoS2-POSS nanohybrid can be dispersed in organic solvents more homogeneously without adscititious dispersants or surfactants due to its better organic compatibilities. SEM and EDS analyses indicate that a synergistic frictional effect is responsible for the improved friction-reduction and anti-wear behavior.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2019
·
IF 4.784
Li-jun Sun,Lingbo Qu,Ran Yang,Lu Yin,Hua-jin Zeng
In this study, cysteamine-functionalized molybdenum disulfide quantum dots (MoS 2 QDs) were synthesized by a one-pot hydrothermal method . A range of techniques including of Thioflavin T and 8-Anilino-1-naphthalenesulfonic acid fluorescence assays , circular dichroism , and transmission electron microscope have been employed to determination the efficacy of MoS 2 QDs on the inhibition/reversion of fibrillation and hindering cytotoxicity induced by protofibrils and amyloid fibrils of bovine serum albumin (BSA). Results demonstrated that MoS 2 QDs could effectively inhibit the fibrillogenesis and destabilize preformed fibrils of BSA in a concentration-dependent manner. Cytotoxicity protection and imagine on Hela cells was investigated using the methyl thiazolyl tetrazolium (MTT) assay. It was found that MoS 2 QDs not only has good biocompatibility, low toxicity and good cell penetration, but also could effectively decrease the cytotoxicity caused by the formed fibrils of BSA. The results obtained in this work suggested the potential biological application of MoS 2 QDs in therapeutics and provided new insight into the design of multifunctional nanomaterials for amyloid-related diseases.
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高影响因子
PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION
·
2018
·Vol. 36
·期 2
·1800362
·
IF 4.384
Wenxu Yin,Xue Bai,Xiaoyu Zhang,Jia Zhang,Xupeng Gao,William W. Yu
Molybdenum disulfide (MoS 2 ) quantum dots (QDs) are known for their excitation-wavelength-dependent photoluminescent (PL) properties. However, the mechanism of this phenomenon is still unclear. Here, small size MoS 2 QDs with a narrow size distribution are synthesized. Based on the decay study and PL dynamics, a reasonable radiation model is presented to understand the special PL properties, i.e., the carrier recombination in the localized surface defect states generated the PL. Accordingly, this optical property is used to fabricate multicolor light-emitting devices with the same MoS 2 QDs. The emission color covers the full visible spectrum from blue to red, only by adjusting the thickness of the down-conversion QD layers.
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高影响因子
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