npj 2D Materials and Applications最新文献

Memristors based on two-dimensional h-BN materials: synthesis, mechanism, optimization and application

IF 9.1 2区材料科学

npj 2D Materials and Applications Pub Date : 2024-12-19 DOI: 10.1038/s41699-024-00519-z

Shaojie Zhang, Ye Tao, Shiwei Qin, Dong Li, Kunkun Cao, Lin Lv, Guokun Ma, Yiheng Rao, Houzhao Wan, Wang Hao

引用次数: 0

First-principles study of the magneto-Raman effect in van der Waals layered magnets

IF 9.1 2区材料科学

npj 2D Materials and Applications Pub Date : 2024-12-19 DOI: 10.1038/s41699-024-00515-3

Xiangru Kong, Panchapakesan Ganesh, Liangbo Liang

引用次数: 0

Revisiting the origin of non-volatile resistive switching in MoS2 atomristor

IF 9.1 2区材料科学

npj 2D Materials and Applications Pub Date : 2024-12-05 DOI: 10.1038/s41699-024-00518-0

Asif A. Shah, Aadil Bashir Dar, Mayank Shrivastava

{"title":"Revisiting the origin of non-volatile resistive switching in MoS2 atomristor","authors":"Asif A. Shah, Aadil Bashir Dar, Mayank Shrivastava","doi":"10.1038/s41699-024-00518-0","DOIUrl":"10.1038/s41699-024-00518-0","url":null,"abstract":"Recently, Non-Volatile Resistive Switching (NVRS) has been demonstrated in Metal-monolayer MoS2-Metal atomristors. While experiments based on Au metal report the origin of NVRS to be extrinsic, caused by the Au atom adsorption into sulfur vacancies, however, more recently molecular dynamics based on reactive forcefield (ReaxFF) suggest that both monolayer and multilayer MoS2 can also host intrinsic non-volatile resistive states whereby an S atom at a monosulfur vacancy (parent state) pops into the molybdenum plane (popped state) under applied out-of-plane electric field. Our rigorous computations based on Density Functional Theory (DFT) and M3GNet (deep learned forcefield) to carry out structural relaxations and molecular dynamics reveal that such a popped state is unstable and does not represent any intrinsic non-volatile resistive state. This is in contrast with the ReaxFF used in previous studies which inaccurately describes the Potential Energy Surface (PES) of MoS2 around the popped state. More importantly, Au atom adsorbed at a sulfur vacancy in MoS2 atomristors represents a stable non-volatile resistive state which is in excellent agreement with earlier experiment. Furthermore, it is observed that the local heating generated around the adsorbed Au atom in low resistive state leads to cycle-to-cycle variability in MoS2 atomristors.","PeriodicalId":19227,"journal":{"name":"npj 2D Materials and Applications","volume":" ","pages":"1-9"},"PeriodicalIF":9.1,"publicationDate":"2024-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41699-024-00518-0.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142789397","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrocatalytic mechanism for overall water splitting to produce sustainable hydrogen by 2D Janus MoSH monolayer 二维 Janus MoSH 单层整体水分离产生可持续氢的电催化机制

IF 9.1 2区材料科学

npj 2D Materials and Applications Pub Date : 2024-11-27 DOI: 10.1038/s41699-024-00516-2

Deobrat Singh, Nisha Singh, Yogesh Sonvane

{"title":"Electrocatalytic mechanism for overall water splitting to produce sustainable hydrogen by 2D Janus MoSH monolayer","authors":"Deobrat Singh, Nisha Singh, Yogesh Sonvane","doi":"10.1038/s41699-024-00516-2","DOIUrl":"10.1038/s41699-024-00516-2","url":null,"abstract":"In the present work, we investigates the potential of two dimensional (2D) Janus MoSH monolayer as an electrocatalyst for overall water splitting using first-principles calculations. Our results shows that 2D Janus MoSH monolayer exhibits excellent structural stability and electronic properties, which are essential for efficient electrocatalysis. We find that the charge transfer mechanism between Mo and S atoms plays a crucial role in the electrocatalytic activity of 2D Janus MoSH monolayer. Due to the asymmetric structure of MoSH monolayer, it has intrinsic electric field with dipole moment of 0.24 D. Moreover, we demonstrate that 2D Janus MoSH monolayer exhibits high catalytic activity for both hydrogen evolution reaction (HER) with overpotential 0.04 V and oxygen evolution reaction (OER) with overpotential 0.11 V, making it a promising candidate for overall water splitting. Our findings have significant implications for the design and optimization of 2D monolayered materials for renewable energy production. By providing insights into the underlying mechanisms of HER and OER on 2D Janus MoSH monolayer, our study paves the way for the development of efficient and sustainable electrocatalysts for water splitting. We hope that current work will be helpful in understanding the electrocatalytic mechanism of 2D Janus MoSH monolayer and its potential applications in renewable energy production.","PeriodicalId":19227,"journal":{"name":"npj 2D Materials and Applications","volume":" ","pages":"1-9"},"PeriodicalIF":9.1,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41699-024-00516-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142714751","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Transient dynamics and long-range transport of 2D exciton with managed potential disorder and phonon scattering 具有管理势能无序和声子散射的二维激子的瞬态动力学和长程输运

IF 9.1 2区材料科学

npj 2D Materials and Applications Pub Date : 2024-11-27 DOI: 10.1038/s41699-024-00512-6

Wenqi Qian, Pengfei Qi, Yuchen Dai, Guangyi Tao, Haiyi Liu, Lie Lin, Zheyu Fang, Weiwei Liu

{"title":"Transient dynamics and long-range transport of 2D exciton with managed potential disorder and phonon scattering","authors":"Wenqi Qian, Pengfei Qi, Yuchen Dai, Guangyi Tao, Haiyi Liu, Lie Lin, Zheyu Fang, Weiwei Liu","doi":"10.1038/s41699-024-00512-6","DOIUrl":"10.1038/s41699-024-00512-6","url":null,"abstract":"Two-dimensional excitons, characterized by high binding energy and valley pseudospin, are key to advancing photonic and electronic devices through controlled spatiotemporal dynamics of exciton flux. However, optimizing excitonic transport and emission dynamics, considering potential disorder and phonon scattering, requires further research. This study systematically investigates the effects of hexagonal boron nitride (hBN) encapsulation on semiconductor monolayers. Time-resolved photoluminescence (TRPL) and femtosecond pump-probe techniques reveal that encapsulation reduces excitonic radiative lifetime and enhances exciton-exciton annihilation, due to increased dielectric screening, which enlarges the Bohr radius and decreases binding energy. It also manages phonon scattering and thermal fluctuations, confirming non-monotonic temperature effects on emission and diffusion. The reduced disorder by hBN leads to a lowered optimized temperature from 250 K to 200 K, concurrently resulting in a doubled enhancement of the effective exciton diffusion coefficient. These findings highlight the importance of thermal and dielectric environmental control for ultrafast 2D exciton-based devices.","PeriodicalId":19227,"journal":{"name":"npj 2D Materials and Applications","volume":" ","pages":"1-9"},"PeriodicalIF":9.1,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41699-024-00512-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142714744","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Theory of magnetotrion-polaritons in transition metal dichalcogenide monolayers 过渡金属二卤化物单层中的磁三离子极化子理论

IF 9.1 2区材料科学

npj 2D Materials and Applications Pub Date : 2024-11-27 DOI: 10.1038/s41699-024-00517-1

Andrejs Kudlis, Ivan Aleksandrov, Zaur Alisultanov, Kalman Varga, Ivan Shelykh, Vanik Shahnazaryan

引用次数: 0

Revealing stacking order transition via nanomechanical resonator 通过纳米机械谐振器揭示堆积阶转变

IF 9.1 2区材料科学

npj 2D Materials and Applications Pub Date : 2024-11-25 DOI: 10.1038/s41699-024-00513-5

Yulu Mao, Fan Fei, Dajun Zhang, Haolin You, Haotian Jiang, Carter Fox, Yangchen He, Daniel Rhodes, Chu Ma, Jun Xiao, Ying Wang

{"title":"Revealing stacking order transition via nanomechanical resonator","authors":"Yulu Mao, Fan Fei, Dajun Zhang, Haolin You, Haotian Jiang, Carter Fox, Yangchen He, Daniel Rhodes, Chu Ma, Jun Xiao, Ying Wang","doi":"10.1038/s41699-024-00513-5","DOIUrl":"10.1038/s41699-024-00513-5","url":null,"abstract":"The physical properties of two-dimensional (2D) van der Waals (vdW) materials are profoundly influenced by their stacking orders, which affect interlayer coupling and crystal symmetry, leading to fascinating strongly correlated orders. Detecting stacking orders is important, yet challenging as they involve sub-nanometer shifts in the relative arrangement of layers. In this study, we utilize nanomechanical resonators to detect the strain change during the stacking order transition of octahedrally coordinated thin molybdenum ditelluride (MoTe2) membranes and show the change in stacking orders can be reflected by the vibration modes of nanomechanical resonators. We discover that a strain as small as 0.014%—induced by transitions in the stacking order—results in a notable frequency shift up to 1.019 MHz in the mechanical resonance. We establish the relationship between the detection sensitivity of stacking orders and both internal and external parameters including higher-order vibrations, electrostatic energy, and initial strain. Our nanomechanical methodology offers a potential avenue for creating a comprehensive phase diagram by uncovering stacking orders across a wide array of van der Waals materials and leveraging ultralow-barrier stacking order transitions for energy-efficient devices.","PeriodicalId":19227,"journal":{"name":"npj 2D Materials and Applications","volume":" ","pages":"1-7"},"PeriodicalIF":9.1,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41699-024-00513-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142694864","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Controlled layer-by-layer assembly and structured coloration of Ti3C2Tz MXene/polyelectrolyte heterostructures Ti3C2Tz MXene/聚电解质异质结构的可控逐层组装和结构着色

IF 9.1 2区材料科学

npj 2D Materials and Applications Pub Date : 2024-11-25 DOI: 10.1038/s41699-024-00514-4

Natalie N. Neal, Kailash Arole, Huaixuan Cao, Vrushali Kotasthane, Sisi Xiang, Diego Ross, Peter R. Stevenson, Miladin Radovic, Micah J. Green, Jodie L. Lutkenhaus

{"title":"Controlled layer-by-layer assembly and structured coloration of Ti3C2Tz MXene/polyelectrolyte heterostructures","authors":"Natalie N. Neal, Kailash Arole, Huaixuan Cao, Vrushali Kotasthane, Sisi Xiang, Diego Ross, Peter R. Stevenson, Miladin Radovic, Micah J. Green, Jodie L. Lutkenhaus","doi":"10.1038/s41699-024-00514-4","DOIUrl":"10.1038/s41699-024-00514-4","url":null,"abstract":"Structural color arises from light scattering rather than organic pigments and can be found in Nature, such as in bird feathers and butterfly wings. Synthetic materials can mimic Nature by leveraging materials with contrasting optical characteristics by controlling each materials’ spatial arrangement in a heterostructure. Two-dimensional MXene nanosheets are particularly interesting due to their unique optical properties, but MXenes have not been used directly as a structural colorant because it is challenging to control the spatial placement of MXenes at the nanometer level. Here, we report the emergence of structural color in layer-by-layer (LbL) assemblies of Ti3C2Tz MXene nanosheets and polyelectrolyte heterostructures with controlled block thicknesses. The block thickness and spatial placement of MXene are controlled by the assembly’s salt concentration and number of layer pairs. This work demonstrates that optical characteristics of MXene/polyelectrolyte heterostructures depend on MXene content and placement, while deepening the understanding of MXenes within structural color films.","PeriodicalId":19227,"journal":{"name":"npj 2D Materials and Applications","volume":" ","pages":"1-12"},"PeriodicalIF":9.1,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41699-024-00514-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142694868","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Solution-processable 2D materials for monolithic 3D memory-sensing-computing platforms: opportunities and challenges 用于单片式三维存储-传感-计算平台的可溶液加工二维材料：机遇与挑战

IF 9.1 2区材料科学

npj 2D Materials and Applications Pub Date : 2024-11-14 DOI: 10.1038/s41699-024-00508-2

Baoshan Tang, Maheswari Sivan, Jin Feng Leong, Zefeng Xu, Yu Zhang, Jianan Li, Ruyue Wan, Quanzhen Wan, Evgeny Zamburg, Aaron V-Y Thean

引用次数: 0

Light-driven electrodynamics and demagnetization in FenGeTe2 (n = 3, 5) thin films FenGeTe2 (n = 3, 5) 薄膜中的光驱动电动力学和退磁现象

IF 9.1 2区材料科学

npj 2D Materials and Applications Pub Date : 2024-11-12 DOI: 10.1038/s41699-024-00510-8

Luca Tomarchio, Vincent Polewczyk, Lorenzo Mosesso, Alain Marty, Salvatore Macis, Matthieu Jamet, Frédéric Bonell, Stefano Lupi

{"title":"Light-driven electrodynamics and demagnetization in FenGeTe2 (n = 3, 5) thin films","authors":"Luca Tomarchio, Vincent Polewczyk, Lorenzo Mosesso, Alain Marty, Salvatore Macis, Matthieu Jamet, Frédéric Bonell, Stefano Lupi","doi":"10.1038/s41699-024-00510-8","DOIUrl":"10.1038/s41699-024-00510-8","url":null,"abstract":"Two-dimensional materials-based ultrafast spintronics are expected to surpass conventional data storage and manipulation technologies, that are now reaching their fundamental limits. The newly discovered van der Waals (VdW) magnets provide a new platform for ultrafast spintronics since their magnetic and electrical properties can be tuned by many external factors, such as strain, voltage, magnetic field, or light absorption for instance. Here, we report on the direct relationship between magnetic order and Terahertz (THz) electrodynamics in FenGeTe2 (n = 3, 5) (FGT) films after being illuminated by a femtosecond optical pulse, studying their ultrafast THz response as a function of the optical pump-THz probe temporal delay. In Fe5GeTe2, we find clear evidence that light-induced electronic excitations directly influence THz electrodynamics similarly to a demagnetization process, contrasting with the effects observed in Fe3GeTe2, which are characterized by a thermal energy transfer among electrons, magnons, and phonons. We address these effects as a function of the pump fluence and pump-probe delay, and by tuning the temperature across the magnetic ordering Curie temperature, highlighting the microscopic mechanisms describing the out-of-equilibrium evolution of the THz conductivity. Finally, we find evidence for the incoherent-coherent crossover predicted by the Kondo-Ising scenario in Fe3GeTe2 and successfully simulate its light-driven electrodynamics through a three-temperature model. As indicated by these results, FGT surpasses conventional metals in terms of modulating their properties using an optical lever.","PeriodicalId":19227,"journal":{"name":"npj 2D Materials and Applications","volume":" ","pages":"1-8"},"PeriodicalIF":9.1,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41699-024-00510-8.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142600880","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0