Engineering covalently bonded 2D layered materials by self-intercalation

Zhao, Xiaoxu; Song, Peng; Wang, Chengcai; Riis-Jensen, Anders C.; Fu, Wei; Deng, Ya; Wan, Dongyang; Kang, Lixing; Ning, Shoucong; Dan, Jiadong; Venkatesan, T.; Liu, Zheng; Zhou, Wu; Thygesen, Kristian Sommer; Luo, Xin; Pennycook, Stephen J.; Loh, Kian Ping

doi:10.1038/s41586-020-2241-9

Cited by 240 publications

(272 citation statements)

References 49 publications

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“…Recently, the self-intercalated TaS 2 phase was successfully grown by MBE method under a metal-rich chemical potential; the layered 2D compound was transformed into ultrathin, covalently bonded 3D materials with FM properties. 43…”

Section: Vapor Phase Methodsmentioning

confidence: 99%

Section: Electrochemical Methodsmentioning

confidence: 99%

“…Reproduced with permission from Ref. 43 Copyright 2020, Springer Nature. BP, black phosphorus; FFT, fast Fourier transform; STEM, scanning transmission electron microscope; TMD, transition metal dichalcogenide; vdW, van der Waals; XRD, X-ray diffraction 4.1 | Phase engineering TMD polymorphs have different d band electron configurations and exhibit distinct electronic properties.…”

Section: Electronic Properties Of Intercalated Tmdsmentioning

confidence: 99%

“…145 The ability to induce FM order is not only limited to FM intercalants. Zhao et al 43 showed that even nonmagnetic atoms could produce magnetism in a broad class of TMDs for specific intercalation state, and they named this class of materials "ic-2D" materials. The selfintercalation of Ta into TaS 2 thin film occurs under metal-rich chemical potential during MBE or CVD growth ( Figure 11A), and the native metal atoms occupy the octahedral vacancies in the vdW gap.…”

Section: Magnetic Properties Of Intercalated Tmdsmentioning

confidence: 99%

“…33 Intercalation modifies the properties of TMD by a myriad of effects, including charge doping, [34][35][36] expansion of c axis lattice constants, [37][38][39][40] orbital hybridization, [41][42][43] and phonon scattering. 37,44,45 A wide range of properties could be promoted or tuned, from electrical conductivity, 46,47 optical modes, 48,49 magnetic order, 43,50 thermoelectricity, 45,51 catalytic activities, 52,53 to energy storage and conversion performances. 30,31 Moreover, the concentration of the intercalant can have a threshold effect in ferroic or charge orders.…”

Section: Introductionmentioning

confidence: 99%

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Intercalated phases of transition metal dichalcogenides

Wang

et al. 2020

SmartMat

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Two‐dimensional transition metal dichalcogenides (TMDs) play host to a wide range of novel topological states, such as quantum spin Hall insulators, superconductors, and Weyl semimetals. The rich polymorphism in TMDs suggests that phase engineering can be used to switch between different charge order states. Intercalation of atoms or molecules into the van der Waals gap of TMDs has emerged as a powerful approach to modify the properties of the material, leading to phase transition or the formation of substoichiometric phases via compositional tuning, thus broadening the electronic and optical landscape of these materials for a wide range of applications. Here, we review the current efforts in the preparation of intercalated TMD. The challenges and opportunities for intercalated TMDs to create a new device paradigm for material science are discussed.

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Section: Vapor Phase Methodsmentioning

confidence: 99%

Section: Electrochemical Methodsmentioning

confidence: 99%

Section: Electronic Properties Of Intercalated Tmdsmentioning

confidence: 99%

Section: Magnetic Properties Of Intercalated Tmdsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Intercalated phases of transition metal dichalcogenides

Wang

et al. 2020

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Regulating Intercalation of Layered Compounds for Electrochemical Energy Storage and Electrocatalysis

Yang

Tamirat

Bin

et al. 2021

Adv Funct Materials

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Layered materials have received extensive attention for widespread applications such as energy storage and conversion, catalysis, and ion transport owing to their fast ion diffusion, exfoliative feature, superior mechanical flexibility, tunable bandgap structure, etc. The presence of large interlayer space between each layer enhances intercalation of the guest ion or molecule, which is beneficial for fast ion diffusion and charge transport along the channels. This intercalation reaction of layered compounds with guest species results in material with improved mechanical and electronic properties for efficient energy storage and conversion, catalysis, ion transport, and other applications. This review extensively discusses the intercalation of guest ionic or molecular species into layered materials used for various types of applications. It assesses the intercalation strategies, mechanism of ionic or molecular intercalation reactions, and highlights recent advancements. The electrochemical performances of several typical intercalated materials in batteries, supercapacitors, and electrocatalytic systems have been thoroughly discussed. Moreover, the challenges in the design and intercalation of layered materials, as well as prospects of future development are highlighted.

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Self‐Intercalated Magnetic Heterostructures in 2D Chromium Telluride

Niu

Qiu²,

Wang

et al. 2022

Adv Funct Materials

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Emerging 2D magnetic heterojunctions attract substantial interest due to their potential applications in spintronics. Achieving magnetic phase engineering with structural integrity in 2D heterojunctions is of paramount importance for their magnetism manipulation. Herein, starting with chromium ditelluride (CrTe2) as the backbone framework, various lateral and vertical magnetic heterojunctions are obtained via self‐intercalated 2D chromium telluride (CrxTey). A Cr2Te3‐Cr5Te8 lateral heterojunction prototype is demonstrated for the manipulation of magnetic moments under different magnitudes of magnetic excitation, showing a sharply stepped hysteresis loop with a dual spin‐flip transition at high Curie temperatures up to 150 and 210 K by magneto‐optical Kerr measurement. High‐resolution scanning transmission electron microscopy and first‐principles calculations reveal a preferred random location of Cr intercalants at the phase boundary, allowing lowering energy associated with crystal field splitting. The overall structural rigidity of chromium‐telluride heterostructure with magnetic phase decoupled behaviors is promising for 2D spintronic devices.

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Engineering covalently bonded 2D layered materials by self-intercalation

Cited by 240 publications

References 49 publications

Intercalated phases of transition metal dichalcogenides

Intercalated phases of transition metal dichalcogenides

Regulating Intercalation of Layered Compounds for Electrochemical Energy Storage and Electrocatalysis

Self‐Intercalated Magnetic Heterostructures in 2D Chromium Telluride

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