1
|
Kumar P, Singh G, Guan X, Roy S, Lee J, Kim IY, Li X, Bu F, Bahadur R, Iyengar SA, Yi J, Zhao D, Ajayan PM, Vinu A. The Rise of Xene Hybrids. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2403881. [PMID: 38899836 DOI: 10.1002/adma.202403881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2024] [Revised: 05/22/2024] [Indexed: 06/21/2024]
Abstract
Xenes, mono-elemental atomic sheets, exhibit Dirac/Dirac-like quantum behavior. When interfaced with other 2D materials such as boron nitride, transition metal dichalcogenides, and metal carbides/nitrides/carbonitrides, it enables them with unique physicochemical properties, including structural stability, desirable bandgap, efficient charge carrier injection, flexibility/breaking stress, thermal conductivity, chemical reactivity, catalytic efficiency, molecular adsorption, and wettability. For example, BN acts as an anti-oxidative shield, MoS2 injects electrons upon laser excitation, and MXene provides mechanical flexibility. Beyond precise compositional modulations, stacking sequences, and inter-layer coupling controlled by parameters, achieving scalability and reproducibility in hybridization is crucial for implementing these quantum materials in consumer applications. However, realizing the full potential of these hybrid materials faces challenges such as air gaps, uneven interfaces, and the formation of defects and functional groups. Advanced synthesis techniques, a deep understanding of quantum behaviors, precise control over interfacial interactions, and awareness of cross-correlations among these factors are essential. Xene-based hybrids show immense promise for groundbreaking applications in quantum computing, flexible electronics, energy storage, and catalysis. In this timely perspective, recent discoveries of novel Xenes and their hybrids are highlighted, emphasizing correlations among synthetic parameters, structure, properties, and applications. It is anticipated that these insights will revolutionize diverse industries and technologies.
Collapse
Affiliation(s)
- Prashant Kumar
- Global Innovative Centre for Advanced Nanomaterials (GICAN), College of Engineering, Science and Environment (CESE), University of Newcastle, University Drive, Callaghan, New South Wales, 2308, Australia
| | - Gurwinder Singh
- Global Innovative Centre for Advanced Nanomaterials (GICAN), College of Engineering, Science and Environment (CESE), University of Newcastle, University Drive, Callaghan, New South Wales, 2308, Australia
| | - Xinwei Guan
- Global Innovative Centre for Advanced Nanomaterials (GICAN), College of Engineering, Science and Environment (CESE), University of Newcastle, University Drive, Callaghan, New South Wales, 2308, Australia
| | - Soumyabrata Roy
- Department of Materials Science and Nano Engineering, Rice University, 6100 Main St, Houston, TX, 77005, USA
- Department of Sustainable Energy Engineering, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, 208016, India
| | - Jangmee Lee
- Global Innovative Centre for Advanced Nanomaterials (GICAN), College of Engineering, Science and Environment (CESE), University of Newcastle, University Drive, Callaghan, New South Wales, 2308, Australia
| | - In Young Kim
- Global Innovative Centre for Advanced Nanomaterials (GICAN), College of Engineering, Science and Environment (CESE), University of Newcastle, University Drive, Callaghan, New South Wales, 2308, Australia
| | - Xiaomin Li
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Laboratory of Advanced Materials, State Key Laboratory of Molecular Engineering of Polymers, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Fudan University, Shanghai, 200433, P. R. China
| | - Fanxing Bu
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Laboratory of Advanced Materials, State Key Laboratory of Molecular Engineering of Polymers, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Fudan University, Shanghai, 200433, P. R. China
| | - Rohan Bahadur
- Global Innovative Centre for Advanced Nanomaterials (GICAN), College of Engineering, Science and Environment (CESE), University of Newcastle, University Drive, Callaghan, New South Wales, 2308, Australia
| | - Sathvik Ajay Iyengar
- Department of Materials Science and Nano Engineering, Rice University, 6100 Main St, Houston, TX, 77005, USA
| | - Jiabao Yi
- Global Innovative Centre for Advanced Nanomaterials (GICAN), College of Engineering, Science and Environment (CESE), University of Newcastle, University Drive, Callaghan, New South Wales, 2308, Australia
| | - Dongyuan Zhao
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Laboratory of Advanced Materials, State Key Laboratory of Molecular Engineering of Polymers, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Fudan University, Shanghai, 200433, P. R. China
| | - Pulickel M Ajayan
- Department of Materials Science and Nano Engineering, Rice University, 6100 Main St, Houston, TX, 77005, USA
| | - Ajayan Vinu
- Global Innovative Centre for Advanced Nanomaterials (GICAN), College of Engineering, Science and Environment (CESE), University of Newcastle, University Drive, Callaghan, New South Wales, 2308, Australia
| |
Collapse
|
2
|
Puthirath Balan A, Kumar A, Reiser P, Vimal Vas J, Denneulin T, Lee KD, Saunderson TG, Tschudin M, Pellet-Mary C, Dutta D, Schrader C, Scholz T, Geuchies J, Fu S, Wang H, Bonanni A, Lotsch BV, Nowak U, Jakob G, Gayles J, Kovacs A, Dunin-Borkowski RE, Maletinsky P, Kläui M. Identifying the Origin of Thermal Modulation of Exchange Bias in MnPS 3/Fe 3GeTe 2 van der Waals Heterostructures. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024:e2403685. [PMID: 38994679 DOI: 10.1002/adma.202403685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2024] [Revised: 06/24/2024] [Indexed: 07/13/2024]
Abstract
The exchange bias phenomenon, inherent in exchange-coupled ferromagnetic and antiferromagnetic systems, has intrigued researchers for decades. Van der Waals materials, with their layered structures, offer an ideal platform for exploring exchange bias. However, effectively manipulating exchange bias in van der Waals heterostructures remains challenging. This study investigates the origin of exchange bias in MnPS3/Fe3GeTe2 van der Waals heterostructures, demonstrating a method to modulate nearly 1000% variation in magnitude through simple thermal cycling. Despite the compensated interfacial spin configuration of MnPS3, a substantial 170 mT exchange bias is observed at 5 K, one of the largest observed in van der Waals heterostructures. This significant exchange bias is linked to anomalous weak ferromagnetic ordering in MnPS3 below 40 K. The tunability of exchange bias during thermal cycling is attributed to the amorphization and changes in the van der Waals gap during field cooling. The findings highlight a robust and adjustable exchange bias in van der Waals heterostructures, presenting a straightforward method to enhance other interface-related spintronic phenomena for practical applications. Detailed interface analysis reveals atom migration between layers, forming amorphous regions on either side of the van der Waals gap, emphasizing the importance of precise interface characterization in these heterostructures.
Collapse
Affiliation(s)
- Aravind Puthirath Balan
- Institute of Physics, Johannes Gutenberg University Mainz, Staudinger Weg 7, 55128, Mainz, Germany
| | - Aditya Kumar
- Institute of Physics, Johannes Gutenberg University Mainz, Staudinger Weg 7, 55128, Mainz, Germany
| | - Patrick Reiser
- Department of Physics, University of Basel, Klingelbergstrasse 82, Basel, CH-4056, Switzerland
| | - Joseph Vimal Vas
- Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons and Peter Grünberg Institute, Forschungszentrum Jülich, 52425, Jülich, Germany
| | - Thibaud Denneulin
- Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons and Peter Grünberg Institute, Forschungszentrum Jülich, 52425, Jülich, Germany
| | - Khoa Dang Lee
- Department of Physics, University of South Florida, Tampa, FL, 33620, USA
| | - Tom G Saunderson
- Institute of Physics, Johannes Gutenberg University Mainz, Staudinger Weg 7, 55128, Mainz, Germany
- Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, 52425, Jülich, Germany
| | - Märta Tschudin
- Department of Physics, University of Basel, Klingelbergstrasse 82, Basel, CH-4056, Switzerland
| | - Clement Pellet-Mary
- Department of Physics, University of Basel, Klingelbergstrasse 82, Basel, CH-4056, Switzerland
| | - Debarghya Dutta
- Department of Physics, University of Basel, Klingelbergstrasse 82, Basel, CH-4056, Switzerland
| | - Carolin Schrader
- Department of Physics, University of Basel, Klingelbergstrasse 82, Basel, CH-4056, Switzerland
| | - Tanja Scholz
- Max Planck Institute for Solid State Research, Heisenbergstraße 1, 70569, Stuttgart, Germany
| | - Jaco Geuchies
- Max Planck Institute for Polymer Research Mainz, Ackermannweg 10, 55128, Mainz, Germany
| | - Shuai Fu
- Max Planck Institute for Polymer Research Mainz, Ackermannweg 10, 55128, Mainz, Germany
| | - Hai Wang
- Max Planck Institute for Polymer Research Mainz, Ackermannweg 10, 55128, Mainz, Germany
| | - Alberta Bonanni
- Institute of Semiconductor and Solid-State Physics, Johannes Kepler University Linz, Altenberger Straße 69, Linz, 4040, Austria
| | - Bettina V Lotsch
- Max Planck Institute for Solid State Research, Heisenbergstraße 1, 70569, Stuttgart, Germany
| | - Ulrich Nowak
- Department of Physics, University of Konstanz, Universitaetsstrasse 10, 78464, Konstanz, Germany
| | - Gerhard Jakob
- Institute of Physics, Johannes Gutenberg University Mainz, Staudinger Weg 7, 55128, Mainz, Germany
| | - Jacob Gayles
- Department of Physics, University of South Florida, Tampa, FL, 33620, USA
| | - Andras Kovacs
- Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons and Peter Grünberg Institute, Forschungszentrum Jülich, 52425, Jülich, Germany
| | - Rafal E Dunin-Borkowski
- Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons and Peter Grünberg Institute, Forschungszentrum Jülich, 52425, Jülich, Germany
| | - Patrick Maletinsky
- Department of Physics, University of Basel, Klingelbergstrasse 82, Basel, CH-4056, Switzerland
| | - Mathias Kläui
- Institute of Physics, Johannes Gutenberg University Mainz, Staudinger Weg 7, 55128, Mainz, Germany
- Center for Quantum Spintronics, Department of Physics, Norwegian University of Science and Technology, Trondheim, 7491, Norway
| |
Collapse
|
3
|
Chahal S, Sahay T, Li Z, Sharma RK, Kumari E, Bandyopadhyay A, Kumari P, Jyoti Ray S, Vinu A, Kumar P. Graphene via Microwave Expansion of Graphite Followed by Cryo-Quenching and its Application in Electrostatic Droplet Switching. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2404337. [PMID: 38958089 DOI: 10.1002/smll.202404337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2024] [Revised: 06/13/2024] [Indexed: 07/04/2024]
Abstract
Monoelemental atomic sheets (Xenes) and other 2D materials offer record electronic mobility, high thermal conductivity, excellent Young's moduli, optical transparency, and flexural capability, revolutionizing ultrasensitive devices and enhancing performance. The ideal synthesis of these quantum materials should be facile, fast, scalable, reproducible, and green. Microwave expansion followed by cryoquenching (MECQ) leverages thermal stress in graphite to produce high-purity graphene within minutes. MECQ synthesis of graphene is reported at 640 and 800 W for 10 min, followed by liquid nitrogen quenching for 5 and 90 min of sonication. Microscopic and spectroscopic analyses confirmed the chemical identity and phase purity of monolayers and few-layered graphene sheets (200-12 µm). Higher microwave power yields thinner layers with enhanced purity. Molecular dynamics simulations and DFT calculations support the exfoliation under these conditions. Electrostatic droplet switching is demonstrated using MECQ-synthesized graphene, observing electrorolling of a mercury droplet on a BN/graphene interface at voltages above 20 V. This technique can inspire the synthesis of other 2D materials with high purity and enable new applications.
Collapse
Affiliation(s)
- Sumit Chahal
- Department of Physics, Indian Institute of Technology Patna, Bihta Campus, Patna, 801106, India
- Indian Institute of Technology Hyderabad, Kandi, Hyderabad, 502284, India
| | - Trisha Sahay
- Department of Physics, Indian Institute of Technology Patna, Bihta Campus, Patna, 801106, India
| | - Zhixuan Li
- Global Innovative Centre for Advanced Nanomaterials (GICAN), University of Newcastle, Callaghan, 2308, Australia
| | - Raju Kumar Sharma
- Department of Mechanical Engineering, Government Engineering College Sheohar, Chhatauna Bisunpur, Block- Piprahi, Sheohar, Bihar, 843329, India
| | - Ekta Kumari
- Department of Physics, Indian Institute of Technology Patna, Bihta Campus, Patna, 801106, India
- Department of Metallurgical and Materials Engineering, Indian Institute of Technology Patna, Bihta Campus, Patna, 801106, India
| | - Arkamita Bandyopadhyay
- Institut für Physik, Theoretische Physik, Martin-Luther-Universität Halle-Wittenber, 06120, Halle, Germany
| | - Puja Kumari
- Department of Physics, Indian Institute of Technology Patna, Bihta Campus, Patna, 801106, India
| | - Soumya Jyoti Ray
- Department of Physics, Indian Institute of Technology Patna, Bihta Campus, Patna, 801106, India
| | - Ajayan Vinu
- Global Innovative Centre for Advanced Nanomaterials (GICAN), University of Newcastle, Callaghan, 2308, Australia
| | - Prashant Kumar
- Department of Physics, Indian Institute of Technology Patna, Bihta Campus, Patna, 801106, India
- Global Innovative Centre for Advanced Nanomaterials (GICAN), University of Newcastle, Callaghan, 2308, Australia
| |
Collapse
|
4
|
Yu X, Peng Z, Xu L, Shi W, Li Z, Meng X, He X, Wang Z, Duan S, Tong L, Huang X, Miao X, Hu W, Ye L. Manipulating 2D Materials through Strain Engineering. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2402561. [PMID: 38818684 DOI: 10.1002/smll.202402561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2024] [Revised: 05/15/2024] [Indexed: 06/01/2024]
Abstract
This review explores the growing interest in 2D layered materials, such as graphene, h-BN, transition metal dichalcogenides (TMDs), and black phosphorus (BP), with a specific focus on recent advances in strain engineering. Both experimental and theoretical results are delved into, highlighting the potential of strain to modulate physical properties, thereby enhancing device performance. Various strain engineering methods are summarized, and the impact of strain on the electrical, optical, magnetic, thermal, and valleytronic properties of 2D materials is thoroughly examined. Finally, the review concludes by addressing potential applications and challenges in utilizing strain engineering for functional devices, offering valuable insights for further research and applications in optoelectronics, thermionics, and spintronics.
Collapse
Affiliation(s)
- Xiangxiang Yu
- School of Integrated Circuits, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, China
- School of Physic and Optoelectronic Engineering, Yangtze University, Jingzhou, Hubei, 434023, China
| | - Zhuiri Peng
- School of Integrated Circuits, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, China
| | - Langlang Xu
- School of Integrated Circuits, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, China
| | - Wenhao Shi
- School of Integrated Circuits, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, China
| | - Zheng Li
- School of Integrated Circuits, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, China
| | - Xiaohan Meng
- School of Integrated Circuits, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, China
| | - Xiao He
- School of Integrated Circuits, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, China
| | - Zhen Wang
- State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai, 200083, China
| | - Shikun Duan
- State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai, 200083, China
| | - Lei Tong
- Department of Electronic Engineering, Materials Science and Technology Research Center, The Chinese University of Hong Kong, Hong Kong, 999077, China
| | - Xinyu Huang
- School of Integrated Circuits, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, China
| | - Xiangshui Miao
- School of Integrated Circuits, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, China
- Hubei Yangtze Memory Laboratories, Wuhan, 430205, China
| | - Weida Hu
- State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai, 200083, China
| | - Lei Ye
- School of Integrated Circuits, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, China
- Hubei Yangtze Memory Laboratories, Wuhan, 430205, China
| |
Collapse
|
5
|
Sahu TK, Kumar N, Chahal S, Jana R, Paul S, Mukherjee M, Tavabi AH, Datta A, Dunin-Borkowski RE, Valov I, Nayak A, Kumar P. Microwave synthesis of molybdenene from MoS 2. NATURE NANOTECHNOLOGY 2023; 18:1430-1438. [PMID: 37666941 PMCID: PMC10716048 DOI: 10.1038/s41565-023-01484-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Accepted: 07/06/2023] [Indexed: 09/06/2023]
Abstract
Dirac materials are characterized by the emergence of massless quasiparticles in their low-energy excitation spectrum that obey the Dirac Hamiltonian. Known examples of Dirac materials are topological insulators, d-wave superconductors, graphene, and Weyl and Dirac semimetals, representing a striking range of fundamental properties with potential disruptive applications. However, none of the Dirac materials identified so far shows metallic character. Here, we present evidence for the formation of free-standing molybdenene, a two-dimensional material composed of only Mo atoms. Using MoS2 as a precursor, we induced electric-field-assisted molybdenene growth under microwave irradiation. We observe the formation of millimetre-long whiskers following screw-dislocation growth, consisting of weakly bonded molybdenene sheets, which, upon exfoliation, show metallic character, with an electrical conductivity of ~940 S m-1. Molybdenene when hybridized with two-dimensional h-BN or MoS2, fetch tunable optical and electronic properties. As a proof of principle, we also demonstrate applications of molybdenene as a surface-enhanced Raman spectroscopy platform for molecular sensing, as a substrate for electron imaging and as a scanning probe microscope cantilever.
Collapse
Affiliation(s)
- Tumesh Kumar Sahu
- Department of Physics, Indian Institute of Technology Patna, Bihar, India
- Department of Physics, Shri Ramdeobaba College of Engineering and Management, Nagpur, India
| | - Nishant Kumar
- Department of Physics, Indian Institute of Technology Patna, Bihar, India
| | - Sumit Chahal
- Department of Physics, Indian Institute of Technology Patna, Bihar, India
| | - Rajkumar Jana
- School of Chemical Sciences, Indian Association of Cultivation of Science, Kolkata, India
| | - Sumana Paul
- School of Chemical Sciences, Indian Association of Cultivation of Science, Kolkata, India
| | - Moumita Mukherjee
- School of Chemical Sciences, Indian Association of Cultivation of Science, Kolkata, India
| | - Amir H Tavabi
- Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons and Peter Grünberg Institute, Forschungszentrum Jülich, Jülich, Germany
| | - Ayan Datta
- School of Chemical Sciences, Indian Association of Cultivation of Science, Kolkata, India
| | - Rafal E Dunin-Borkowski
- Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons and Peter Grünberg Institute, Forschungszentrum Jülich, Jülich, Germany
| | - Ilia Valov
- Peter Grünberg Institute (PGI-7), Forschungszentrum Jülich, Jülich, Germany.
- Institute of Electrochemistry and Energy Systems, Bulgarian Academy of Sciences, Sofia, Bulgaria.
| | - Alpana Nayak
- Department of Physics, Indian Institute of Technology Patna, Bihar, India.
| | - Prashant Kumar
- Department of Physics, Indian Institute of Technology Patna, Bihar, India.
- Global Innovative Centre for Advanced Nanomaterials, The University of Newcastle, Newcastle, New South Wales, Australia.
| |
Collapse
|
6
|
Huang X, Zhang L, Tong L, Li Z, Peng Z, Lin R, Shi W, Xue KH, Dai H, Cheng H, de Camargo Branco D, Xu J, Han J, Cheng GJ, Miao X, Ye L. Manipulating exchange bias in 2D magnetic heterojunction for high-performance robust memory applications. Nat Commun 2023; 14:2190. [PMID: 37069179 PMCID: PMC10110563 DOI: 10.1038/s41467-023-37918-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Accepted: 04/05/2023] [Indexed: 04/19/2023] Open
Abstract
The exchange bias (EB) effect plays an undisputed role in the development of highly sensitive, robust, and high-density spintronic devices in magnetic data storage. However, the weak EB field, low blocking temperature, as well as the lack of modulation methods, seriously limit the application of EB in van der Waals (vdW) spintronic devices. Here, we utilized pressure engineering to tune the vdW spacing of the two-dimensional (2D) FePSe3/Fe3GeTe2 heterostructures. The EB field (HEB, from 29.2 mT to 111.2 mT) and blocking temperature (Tb, from 20 K to 110 K) are significantly enhanced, and a highly sensitive and robust spin valve is demonstrated. Interestingly, this enhancement of the EB effect was extended to exposed Fe3GeTe2, due to the single-domain nature of Fe3GeTe2. Our findings provide opportunities for the producing, exploring, and tuning of magnetic vdW heterostructures with strong interlayer coupling, thereby enabling customized 2D spintronic devices in the future.
Collapse
Affiliation(s)
- Xinyu Huang
- School of Integrated Circuits, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, 430074, China
- Hubei Yangtze Memory Laboratories, Wuhan, 430205, China
| | - Luman Zhang
- Wuhan National High Magnetic Field Center and Department of Physics, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Lei Tong
- School of Integrated Circuits, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Zheng Li
- School of Integrated Circuits, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Zhuiri Peng
- School of Integrated Circuits, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Runfeng Lin
- School of Integrated Circuits, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Wenhao Shi
- School of Integrated Circuits, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Kan-Hao Xue
- School of Integrated Circuits, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Hongwei Dai
- Wuhan National High Magnetic Field Center and Department of Physics, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Hui Cheng
- Wuhan National High Magnetic Field Center and Department of Physics, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Danilo de Camargo Branco
- School of Industrial Engineering and Birck Nanotechnology Centre, Purdue University, West Lafayette, IN, 47907, USA
| | - Jianbin Xu
- Department of Electronic Engineering, Materials Science and Technology Research Center, The Chinese University of Hong Kong, Hong Kong, China
| | - Junbo Han
- Wuhan National High Magnetic Field Center and Department of Physics, Huazhong University of Science and Technology, Wuhan, 430074, China.
| | - Gary J Cheng
- School of Industrial Engineering and Birck Nanotechnology Centre, Purdue University, West Lafayette, IN, 47907, USA.
| | - Xiangshui Miao
- School of Integrated Circuits, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, 430074, China.
- Hubei Yangtze Memory Laboratories, Wuhan, 430205, China.
| | - Lei Ye
- School of Integrated Circuits, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, 430074, China.
- Hubei Yangtze Memory Laboratories, Wuhan, 430205, China.
- State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics Chinese Academy of Sciences, Shanghai, 200083, China.
| |
Collapse
|
7
|
Sahu TK, Motlag M, Bandyopadhyay A, Kumar N, Cheng GJ, Kumar P. 2+δ-Dimensional Materials via Atomistic Z-Welding. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2202695. [PMID: 36089664 PMCID: PMC9661819 DOI: 10.1002/advs.202202695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 07/27/2022] [Indexed: 06/15/2023]
Abstract
Pivotal to functional van der Waals stacked flexible electronic/excitonic/spintronic/thermoelectric chips is the synergy amongst constituent layers. However; the current techniques viz. sequential chemical vapor deposition, micromechanical/wet-chemical transfer are mostly limited due to diffused interfaces, and metallic remnants/bubbles at the interface. Inter-layer-coupled 2+δ-dimensional materials, as a new class of materials can be significantly suitable for out-of-plane carrier transport and hence prompt response in prospective devices. Here, the discovery of the use of exotic electric field ≈106 V cm- 1 (at microwave hot-spot) and 2 thermomechanical conditions i.e. pressure ≈1 MPa, T ≈ 200 °C (during solvothermal reaction) to realize 2+δ-dimensional materials is reported. It is found that Pz Pz chemical bonds form between the component layers, e.g., CB and CN in G-BN, MoN and MoB in MoS2 -BN hybrid systems as revealed by X-ray photoelectron spectroscopy. New vibrational peaks in Raman spectra (BC ≈1320 cm-1 for the G-BN system and MoB ≈365 cm-1 for the MoS2 -BN system) are recorded. Tunable mid-gap formation, along with diodic behavior (knee voltage ≈0.7 V, breakdown voltage ≈1.8 V) in the reduced graphene oxide-reduced BN oxide (RGO-RBNO) hybrid system is also observed. Band-gap tuning in MoS2 -BN system is observed. Simulations reveal stacking-dependent interfacial charge/potential drops, hinting at the feasibility of next-generation functional devices/sensors.
Collapse
Affiliation(s)
- Tumesh Kumar Sahu
- Department of PhysicsIndian Institute of Technology PatnaBihta CampusBihtaPatnaBihar801106India
- Department of PhysicsShri Ramdeo Baba College of Engineering and ManagementNagpurMaharashtra440013India
| | - Maithilee Motlag
- School of Industrial EngineeringPurdue UniversityWest LafayetteIN47907USA
| | | | - Nishant Kumar
- Department of PhysicsIndian Institute of Technology PatnaBihta CampusBihtaPatnaBihar801106India
| | - Gary J. Cheng
- School of Industrial EngineeringPurdue UniversityWest LafayetteIN47907USA
- Institute of Technological SciencesWuhan UniversityWuhan, Hubei430074China
- Birck Nanotechnology CentrePurdue UniversityWest LafayetteIN47907USA
| | - Prashant Kumar
- Department of PhysicsIndian Institute of Technology PatnaBihta CampusBihtaPatnaBihar801106India
- Birck Nanotechnology CentrePurdue UniversityWest LafayetteIN47907USA
- Global Innovation Centre for Advanced NanomaterialsThe University of NewcastleNewcastle2308Australia
| |
Collapse
|
8
|
Chahal S, Bandyopadhyay A, Dash SP, Kumar P. Microwave Synthesized 2D Gold and Its 2D-2D Hybrids. J Phys Chem Lett 2022; 13:6487-6495. [PMID: 35819242 DOI: 10.1021/acs.jpclett.2c01540] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Xenes, i.e., monoelemental two-dimensional atomic sheets, are promising for sensitive and ultrafast sensor applications owing to exceptional carrier mobility; however, most of them oxidize below 500 °C and therefore cannot be employed for high-temperature applications. 2D gold, an oxidation-resistant plasmonic Xene, is extremely promising. 2D gold was experimentally realized by both atomic layer deposition and chemical synthesis using sodium citrate. However, it is imperative to develop a new facile single-step method to synthesize 2D gold. Here, liquid-phase synthesis of 2D gold is demonstrated by microwave exposure to auric chloride dispersed in dimethylformamide. Microscopies (AFM and high-resolution TEM), spectroscopies (Raman, UV-vis, and X-ray photoelectron), and X-ray diffraction establish the formation of a hexagonal crystallographic phase for 2D gold. 2D-2D hybrids of 2D gold have also been synthesized and investigated for electronic/optoelectronic behaviors and SERS-based molecular sensing. DFT band structure calculation for 2D gold and its hybrids corroborates the experimental findings.
Collapse
Affiliation(s)
- Sumit Chahal
- Department of Physics, Indian Institute of Technology Patna, Bihta Campus, Patna-801106, India
| | - Arkamita Bandyopadhyay
- The Bremen Center for Computational Materials Science (BCCMS), Universität Bremen, Am Fallturm 1, TAB Building, 28359 Bremen, Germany
| | - Saroj P Dash
- Department of Microtechnology and Nanoscience, Quantum Device Physics Laboratory, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden
| | - Prashant Kumar
- Department of Physics, Indian Institute of Technology Patna, Bihta Campus, Patna-801106, India
- Global Innovative Center for Advanced Nanomaterials, University of Newcastle, Callaghan, New South Wales 2308, Australia
| |
Collapse
|
9
|
Vishwakarma K, Rani S, Chahal S, Lu CY, Ray SJ, Yang CS, Kumar P. Quantum-coupled borophene-based heterolayers for excitonic and molecular sensing applications. Phys Chem Chem Phys 2022; 24:12816-12826. [PMID: 35608151 DOI: 10.1039/d2cp01712a] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Borophene (B), with remarkably unique chemical binding in its crystallographic structural phases including anisotropic structures, theoretically has high Young's modulus and thermal conductivity. Moreover, it is metallic in nature, and has recently joined the family of two-dimensional (2D) materials and is poised to be employed in flexible hetero-layered devices and sensors in fast electronic gadgets and excitonic devices. Interfacial coupling helps individual atomic sheets synergistically work in tandem, and is very crucial in controllable functionality. Most of the microscopic and spectroscopic scans reveal surface information; however, information regarding interfacial coupling is difficult to obtain. Electronic signatures of dynamic inter-layer coupling in B/boron nitride (BN) and B/molybdenum disulfide (MoS2) have been detected in the form of distinct peaks in differential current signals obtained from scanning tunneling spectroscopy (STS) and conducting atomic force microscopy (CAFM). These unique sets of observed peaks represent interfacial coupling quantum states. The peaks in the electronic density of states (DOS) obtained via density functional theory (DFT) band structure calculations matched well with the electronic signatures of coupling quantum states. In our calculations, we found that the DOS peak evolves when the component layers are brought to compromised distances. While B/BN exhibits green sensitivity indicating mid-gap formation, B/MoS2 bestows red sensitivity indicating band-gap excitation of MoS2. Molecular detection of methylene blue (MB) based on surface-enhanced Raman spectroscopy (SERS) was carried out with borophene-based hetero-layered stacks as molecular anchoring platforms.
Collapse
Affiliation(s)
- Kavita Vishwakarma
- Department of Physics, Indian Institute of Technology Patna, Bihta Campus, Patna-801106, India.,Department of Electronics and Communication Engineering, Indian Institute of Technology Roorkee, Roorkee-247667, India
| | - Shivani Rani
- Department of Physics, Indian Institute of Technology Patna, Bihta Campus, Patna-801106, India
| | - Sumit Chahal
- Department of Physics, Indian Institute of Technology Patna, Bihta Campus, Patna-801106, India
| | - Chia-Yen Lu
- Institute and Undergraduate Program of Electro-Optical Engineering, National Taiwan Normal University, Taipei 11677, Taiwan.
| | - Soumya Jyoti Ray
- Department of Physics, Indian Institute of Technology Patna, Bihta Campus, Patna-801106, India
| | - Chan-Shan Yang
- Institute and Undergraduate Program of Electro-Optical Engineering, National Taiwan Normal University, Taipei 11677, Taiwan. .,Micro/Nano Device Inspection and Research Center, National Taiwan Normal University, Taipei 106, Taiwan
| | - Prashant Kumar
- Department of Physics, Indian Institute of Technology Patna, Bihta Campus, Patna-801106, India.,Global Innovation Centre for Advanced Nanomaterials, The University of Newcastle, University Drive, Newcastle-2308, NSW, Australia.
| |
Collapse
|
10
|
Wang X, Zhao Y, Kong X, Zhang Q, Ng HK, Lim SX, Zheng Y, Wu X, Watanabe K, Xu QH, Taniguchi T, Eda G, Goh KEJ, Jin S, Loh KP, Ding F, Sun W, Sow CH. Dynamic Tuning of Moiré Superlattice Morphology by Laser Modification. ACS NANO 2022; 16:8172-8180. [PMID: 35575066 DOI: 10.1021/acsnano.2c01625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
In artificial van der Waals (vdW) layered devices, twisting the stacking angle has emerged as an effective strategy to regulate the electronic phases and optical properties of these systems. Along with the twist registry, the lattice reconstruction arising from vdW interlayer interaction has also inspired significant research interests. The control of twist angles is significantly important because the moiré periodicity determines the electron propagation length on the lattice and the interlayer electron-electron interactions. However, the moiré periodicity is hard to be modified after the device has been fabricated. In this work, we have demonstrated that the moiré periodicity can be precisely modulated with a localized laser annealing technique. This is achieved with regulating the interlayer lattice mismatch by the mismatched lattice constant, which originates from the variable density of sulfur vacancy generated during laser modification. The existence of sulfur vacancy is further verified by excitonic emission energy and lifetime in photoluminescence measurements. Furthermore, we also discover that the mismatched lattice constant has the equivalent contribution as the twist angle for determining the lattice mismatch. Theoretical modeling elaborates the moiré-wavelength-dependent energy variations at the interface and mimics the evolution of moiré morphology.
Collapse
Affiliation(s)
- Xinyun Wang
- Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117542
- Centre for Advanced 2D Materials, National University of Singapore, 6 Science Drive 2, Singapore 117546
| | - Yuzhou Zhao
- Department of Chemistry, University of Wisconsin─Madison, Madison, Wisconsin 53706, United States
| | - Xiao Kong
- Centre for Multidimensional Carbon Materials, Institute for Basic Science, Ulsan, Korea 44919
| | - Qi Zhang
- Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117542
| | - Hong Kuan Ng
- Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117542
| | - Sharon Xiaodai Lim
- Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117542
| | - Yue Zheng
- Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117542
- Centre for Advanced 2D Materials, National University of Singapore, 6 Science Drive 2, Singapore 117546
| | - Xiao Wu
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543
| | - Kenji Watanabe
- Research Center for Functional Materials, National Institute for Materials Science, Namiki Tsukuba, Ibaraki Japan 305-0044
| | - Qing-Hua Xu
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543
| | - Takashi Taniguchi
- International Center for Materials Nanoarchitectonics, National Institute for Materials Science, Namiki Tsukuba, Ibaraki Japan 305-0044
| | - Goki Eda
- Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117542
- Centre for Advanced 2D Materials, National University of Singapore, 6 Science Drive 2, Singapore 117546
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543
| | - Kuan Eng Johnson Goh
- Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117542
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 2 Fusionopolis Way, Singapore 138634
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
| | - Song Jin
- Department of Chemistry, University of Wisconsin─Madison, Madison, Wisconsin 53706, United States
| | - Kian Ping Loh
- Centre for Advanced 2D Materials, National University of Singapore, 6 Science Drive 2, Singapore 117546
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543
| | - Feng Ding
- Centre for Multidimensional Carbon Materials, Institute for Basic Science, Ulsan, Korea 44919
| | - Wanxin Sun
- Bruker Nano Surface Division, 30 Biopolis Street 09-01, The Matrix, Singapore 138671
| | - Chorng Haur Sow
- Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117542
- Centre for Advanced 2D Materials, National University of Singapore, 6 Science Drive 2, Singapore 117546
| |
Collapse
|
11
|
Chen C, Lv H, Zhang P, Zhuo Z, Wang Y, Ma C, Li W, Wang X, Feng B, Cheng P, Wu X, Wu K, Chen L. Synthesis of bilayer borophene. Nat Chem 2022; 14:25-31. [PMID: 34764470 DOI: 10.1038/s41557-021-00813-z] [Citation(s) in RCA: 40] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Accepted: 09/16/2021] [Indexed: 11/09/2022]
Abstract
As the nearest-neighbour element to carbon, boron is theoretically predicted to have a planar two-dimensional form, named borophene, with novel properties, such as Dirac fermions and superconductivity. Several polymorphs of monolayer borophene have been grown on metal surfaces, yet thicker bilayer and few-layer nanosheets remain elusive. Here we report the synthesis of large-size, single-crystalline bilayer borophene on the Cu(111) surface by molecular beam epitaxy. Combining scanning tunnelling microscopy and first-principles calculations, we show that bilayer borophene consists of two stacked monolayers that are held together by covalent interlayer boron-boron bonding, and each monolayer has β12-like structures with zigzag rows. The formation of a bilayer is associated with a large transfer and redistribution of charge in the first boron layer on Cu(111), which provides additional electrons for the bonding of additional boron atoms, enabling the growth of the second layer. The bilayer borophene is shown to possess metallic character, and be less prone to being oxidized than its monolayer counterparts.
Collapse
Affiliation(s)
- Caiyun Chen
- Institute of Physics, Chinese Academy of Sciences, Beijing, China.,School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Haifeng Lv
- Hefei National Laboratory for Physical Sciences at the Microscale, Synergetic Innovation of Quantum Information and Quantum Technology, CAS Center for Excellence in Nanoscience, and School of Chemistry and Materials Sciences, University of Science and Technology of China, Hefei, China
| | - Ping Zhang
- Institute of Physics, Chinese Academy of Sciences, Beijing, China.,School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Zhiwen Zhuo
- Hefei National Laboratory for Physical Sciences at the Microscale, Synergetic Innovation of Quantum Information and Quantum Technology, CAS Center for Excellence in Nanoscience, and School of Chemistry and Materials Sciences, University of Science and Technology of China, Hefei, China
| | - Yu Wang
- Institute of Physics, Chinese Academy of Sciences, Beijing, China.,School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Chen Ma
- Institute of Physics, Chinese Academy of Sciences, Beijing, China.,School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Wenbin Li
- Institute of Physics, Chinese Academy of Sciences, Beijing, China.,School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Xuguang Wang
- Institute of Physics, Chinese Academy of Sciences, Beijing, China.,School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Baojie Feng
- Institute of Physics, Chinese Academy of Sciences, Beijing, China.,School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Peng Cheng
- Institute of Physics, Chinese Academy of Sciences, Beijing, China.,School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Xiaojun Wu
- Hefei National Laboratory for Physical Sciences at the Microscale, Synergetic Innovation of Quantum Information and Quantum Technology, CAS Center for Excellence in Nanoscience, and School of Chemistry and Materials Sciences, University of Science and Technology of China, Hefei, China.
| | - Kehui Wu
- Institute of Physics, Chinese Academy of Sciences, Beijing, China. .,School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, China. .,Songshan Lake Materials Laboratory, Dongguan, China.
| | - Lan Chen
- Institute of Physics, Chinese Academy of Sciences, Beijing, China. .,School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, China. .,Songshan Lake Materials Laboratory, Dongguan, China.
| |
Collapse
|
12
|
Ranjan P, Thomas V, Kumar P. 2D materials as a diagnostic platform for the detection and sensing of the SARS-CoV-2 virus: a bird's-eye view. J Mater Chem B 2021; 9:4608-4619. [PMID: 34013310 PMCID: PMC8559401 DOI: 10.1039/d1tb00071c] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Worldwide infections and fatalities caused by the SARS-CoV-2 virus and its variants responsible for COVID-19 have significantly impeded the economic growth of many nations. People in many nations have lost their livelihoods, it has severely impacted international relations and, most importantly, health infrastructures across the world have been tormented. This pandemic has already left footprints on human psychology, traits, and priorities and is certainly going to lead towards a new world order in the future. As always, science and technology have come to the rescue of the human race. The prevention of infection by instant and repeated cleaning of surfaces that are most likely to be touched in daily life and sanitization drives using medically prescribed sanitizers and UV irradiation of textiles are the first steps to breaking the chain of transmission. However, the real challenge is to develop and uplift medical infrastructure, such as diagnostic tools capable of prompt diagnosis and instant and economic medical treatment that is available to the masses. Two-dimensional (2D) materials, such as graphene, are atomic sheets that have been in the news for quite some time due to their unprecedented electronic mobilities, high thermal conductivity, appreciable thermal stability, excellent anchoring capabilities, optical transparency, mechanical flexibility, and a unique capability to integrate with arbitrary surfaces. These attributes of 2D materials make them lucrative for use as an active material platform for authentic and prompt (within minutes) disease diagnosis via electrical or optical diagnostic tools or via electrochemical diagnosis. We present the opportunities provided by 2D materials as a platform for SARS-CoV-2 diagnosis.
Collapse
Affiliation(s)
- Pranay Ranjan
- Department of Physics, UAE University, Al-Ain, Abu Dhabi 15551, United Arab Emirates
| | - Vinoy Thomas
- Department of Materials Science and Engineering, University of Alabama at Birmingham, USA.
| | - Prashant Kumar
- Department of Physics, Indian Institute of Technology Patna, India.
| |
Collapse
|
13
|
Ryu YK, Frisenda R, Castellanos-Gomez A. Superlattices based on van der Waals 2D materials. Chem Commun (Camb) 2019; 55:11498-11510. [PMID: 31483427 DOI: 10.1039/c9cc04919c] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Two-dimensional (2D) materials exhibit a number of improved mechanical, optical, and electronic properties compared to their bulk counterparts. The absence of dangling bonds in the cleaved surfaces of these materials allows combining different 2D materials into van der Waals heterostructures to fabricate p-n junctions, photodetectors, and 2D-2D ohmic contacts that show unexpected performances. These intriguing results are regularly summarized in comprehensive reviews. A strategy to tailor their properties even further and to observe novel quantum phenomena consists in the fabrication of superlattices whose unit cell is formed either by two dissimilar 2D materials or by a 2D material subjected to a periodic perturbation, each component contributing with different characteristics. Furthermore, in a 2D material-based superlattice, the interlayer interaction between the layers mediated by van der Waals forces constitutes a key parameter to tune the global properties of the superlattice. The above-mentioned factors reflect the potential to devise countless combinations of van der Waals 2D material-based superlattices. In the present feature article, we explain in detail the state-of-the-art of 2D material-based superlattices and describe the different methods to fabricate them, classified as vertical stacking, intercalation with atoms or molecules, moiré patterning, strain engineering and lithographic design. We also aim to highlight some of the specific applications of each type of superlattices.
Collapse
Affiliation(s)
- Yu Kyoung Ryu
- Materials Science Factory, Instituto de Ciencia de Materiales de Madrid (ICMM-CSIC), Madrid, E-28049, Spain.
| | - Riccardo Frisenda
- Materials Science Factory, Instituto de Ciencia de Materiales de Madrid (ICMM-CSIC), Madrid, E-28049, Spain.
| | - Andres Castellanos-Gomez
- Materials Science Factory, Instituto de Ciencia de Materiales de Madrid (ICMM-CSIC), Madrid, E-28049, Spain.
| |
Collapse
|
14
|
Motlag M, Hu Y, Tong L, Huang X, Ye L, Cheng GJ. Laser-Shock-Induced Nanoscale Kink-Bands in WSe 2 2D Crystals. ACS NANO 2019; 13:10587-10595. [PMID: 31424915 DOI: 10.1021/acsnano.9b04705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The response of materials to high stress and strain rates in nature has been a long-term scientific interest. The formation of kinks is a common deformation feature under high pressure and strain rates among foliated structures, such as rock-forming minerals. Although deformation of foliated rock layers in geology has been investigated for a century, the deformation behavior of their nanoscale counterparts, such as two-dimensional (2D) layered materials, under high stress and strain rates has not been investigated. 2D transition metal dichalcogenides have very strong in-plane rigidity, whereas the interlayer shear modulus is 3 orders of magnitude lower than their in-plane Young's modulus. Here, we study the structure and property changes in multilayer WSe2 2D layers during a 3D nanoshaping process where laser-shock pressure at the GPa level is applied to imprint the 2D multilayers into a designed nanomold, forming a large local bending strain of 5-6%. The microstructure of the 2D multilayers after laser shock is observed to be a nanoscale kink-band, similar to that of strained geological layered crystals, due to the high-pressure-induced bending and shearing. The deformed kink-band structure is investigated experimentally by high-resolution transmission electron microscopy and atomic force microscopy and validated by molecular dynamics simulations. The changes in the resulting electronic band structure are investigated by first-principles calculations. The laser-shock straining technology to induce kink-band structures can enrich the understanding and facilitate the applications of many 2D materials.
Collapse
Affiliation(s)
| | | | - Lei Tong
- School of Optical and Electronic Information and Wuhan National Laboratory for Optoelectronics , Huazhong University of Science and Technology , Luoyu Road 1037 , Wuhan 430074 , China
| | - Xinyu Huang
- School of Optical and Electronic Information and Wuhan National Laboratory for Optoelectronics , Huazhong University of Science and Technology , Luoyu Road 1037 , Wuhan 430074 , China
| | - Lei Ye
- School of Optical and Electronic Information and Wuhan National Laboratory for Optoelectronics , Huazhong University of Science and Technology , Luoyu Road 1037 , Wuhan 430074 , China
| | | |
Collapse
|