Frank–van der Merwe Growth versus Volmer–Weber Growth in Successive Stacking of a Few‐Layer Bi2Te3/Sb2Te3 by van der Waals Heteroepitaxy: The Critical Roles of Finite Lattice‐Mismatch with Seed Substrates

Heo, Heeok; Sung, Ji Ho; Ahn, Ji‐Hoon; Ghahari, Fereshte; Taniguchi, Takashi; Watanabe, Kenji; Kim, Philip; Jo, Moon‐Ho

doi:10.1002/aelm.201600375

Cited by 28 publications

(15 citation statements)

References 52 publications

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“…While it is possible to achieve growth of compounds with small m and n , the pure growth of other members of the series is highly challenging due to disorder. These polymorphs are close to each other in composition, and thus even small variations in the flux or other growth conditions result in a formation of stacking faults and disorder. ,, The growth of M V 2 X 3 phases and control over (M V 2 ) m (M V 2 X 3 ) n stoichiometry have also been realized with CVD, , MOCVD, − MOVPE, PLD, − PVT, sputtering, , and other methods …”

Section: Post-transition Metal Chalcogenidesmentioning

confidence: 99%

Polymorphism in Post-Dichalcogenide Two-Dimensional Materials

2021

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Two-dimensional (2D) materials exhibit a wide range of atomic structures, compositions, and associated versatility of properties. Furthermore, for a given composition, a variety of different crystal structures (i.e., polymorphs) can be observed. Polymorphism in 2D materials presents a fertile landscape for designing novel architectures and imparting new functionalities. The objective of this Review is to identify the polymorphs of emerging 2D materials, describe their polymorph-dependent properties, and outline methods used for polymorph control. Since traditional 2D materials (e.g., graphene, hexagonal boron nitride, and transition metal dichalcogenides) have already been studied extensively, the focus here is on polymorphism in post-dichalcogenide 2D materials including group III, IV, and V elemental 2D materials, layered group III, IV, and V metal chalcogenides, and 2D transition metal halides. In addition to providing a comprehensive survey of recent experimental and theoretical literature, this Review identifies the most promising opportunities for future research including how 2D polymorph engineering can provide a pathway to materials by design.

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Section: Post-transition Metal Chalcogenidesmentioning

confidence: 99%

Polymorphism in Post-Dichalcogenide Two-Dimensional Materials

2021

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“…[160,161] However, because of the defects, etc., during the deposition process, it easily leads to the growth mode of Volmer-Weber (VW) mode (3D island) or the Stranski-Krastanov (SK) mode (layer-island), not the Frank-van der Merwe (FM) layer by layer manner. [51,[162][163][164] Some techniques have been reported to be applied to the growth of the continuous 2D film. PLD is a technique, which deposits the congruent moving energetic particles from a target to a substrate, generated from a plume by the direct injection of pulsed laser onto a target, not involving any chemical reaction.…”

Section: Physical Vapor Depositionmentioning

confidence: 99%

Toward Wafer‐Scale Production of 2D Transition Metal Chalcogenides

Wang

Yang

2021

Adv Elect Materials

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When the timeline reached 2004, graphene, the single layer of graphite, was discovered through a scotch-tape exfoliation method and was found to have ultrahigh mobility. [25][26][27] Various 2D materials such as transition metal chalcogenides (TMCs), [28][29][30] boron nitrides (BNs), [31,32] black phosphorus, [33,34] and some new materials including Si, [35] Te, [36] and black arsenic-phosphorus [37] were subsequently synthesized, enabling the fabrication of numerous novel devices. The field of 2D materials is now making strong voice, which is no longer ignored by the scientific and technological community. [38][39][40] Among the various 2D materials, the TMCs constituted by the transition metal elements (M) and the chalcogen elements (X) are a large family. M can range from group 4B to group 10 in the periodic table, while X is S, Se, or Te. [41][42][43][44][45][46][47] Figure 1a exhibits the binary TMCs that have already been explored. This variation of composition of elements transfers to a wide range of properties ranging from insulators (e.g., HfS 2 ), [48,49] semiconductors (e.g., MoS 2 , WS 2 ), [50,51] semimetals (e.g., MoTe 2 , TiSe 2 ), [52,53] to metals (e.g., NbSe 2 , VS 2 ). [54][55][56] Furthermore, TMCs can form alloys in the formula such as WSe 2−x S x , with composition-tunable properties. [57][58][59] Unlike semimetallic graphene, semiconducting TMCs usually possess a bandgap. For example, MoS 2 exhibits a bandgap, transitioning from indirect bandgap to direct bandgap when it thins from bulk phase to monolayer (Figure 1b), boosting the photoluminescence (PL) efficiency. [51,[60][61][62] Additionally, inversion symmetry breaking and large spin-orbit interaction, resulting in two energetic degenerate but inequivalent valleys in the band structure of a TMC (Figure 1c), may lead to breakthroughs in valleytronics and spintronics. [63][64][65][66][67][68][69][70] A few TMCs (e.g., NbSe 2 , TaS 2 , VSe 2 ) have shown superconductivity, [71,72] charge density wave [73,74] and Mott transition (transition from metal to nonmetal). [75,76] In addition, some novel TMCs such as Fe 3 GeTe 2 display intrinsic magnetism with gate-tunable Curie points. [66,77] Semimetallic TMCs like WTe 2 show topological structures in the energy band, enabling the study on topological physics. [78,79] The rich intrinsic properties and superior tunability of TMCs hold great promise for all kinds of technologically important applications in electronics, optoelectronics, spintronics, valleytronics, etc. (Figure 1d). [51,[80][81][82][83][84][85][86][87][88][89][90][91] Due to numerous unique properties of 2D TMCs, devices such as transistors, photodetectors (PDs), and photodiodes based on 2D TMCs have been actively pursued. The ultimate destination of the miniaturization of the electronic devices will 2D transition metal chalcogenides (TMCs) have attracted tremendous interest from both the scientific and technological communities due to their variety of properties and superior tunability through layer number, composition, and inter...

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“…Extensions of the Wulff construction rule to Winterbottom and Summertop constructions further predict the crystal shapes when the crystal growth is confined by substrates 9 . Regarding surface morphology, a diversity of models on kinetic growth mode such as the Stranski–Krastanov, Frank–van der Merwe, and Volmer–Weber models weigh the balance of factors such as energy landscape of the crystal surface and surface diffusional dynamics, to predict whether building units attach layer-by-layer (relatively smooth) or as islands (relatively rough) to growing crystals 10 , 11 .…”

Section: Introductionmentioning

confidence: 99%

Imaging how thermal capillary waves and anisotropic interfacial stiffness shape nanoparticle supracrystals

Yao

et al. 2020

Nat Commun

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Development of the surface morphology and shape of crystalline nanostructures governs the functionality of various materials, ranging from phonon transport to biocompatibility. However, the kinetic pathways, following which such development occurs, have been largely unexplored due to the lack of real-space imaging at single particle resolution. Here, we use colloidal nanoparticles assembling into supracrystals as a model system, and pinpoint the key role of surface fluctuation in shaping supracrystals. Utilizing liquid-phase transmission electron microscopy, we map the spatiotemporal surface profiles of supracrystals, which follow a capillary wave theory. Based on this theory, we measure otherwise elusive interfacial properties such as interfacial stiffness and mobility, the former of which demonstrates a remarkable dependence on the exposed facet of the supracrystal. The facet of lower surface energy is favored, consistent with the Wulff construction rule. Our imaging–analysis framework can be applicable to other phenomena, such as electrodeposition, nucleation, and membrane deformation.

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Frank–van der Merwe Growth versus Volmer–Weber Growth in Successive Stacking of a Few‐Layer Bi₂Te₃/Sb₂Te₃ by van der Waals Heteroepitaxy: The Critical Roles of Finite Lattice‐Mismatch with Seed Substrates

Cited by 28 publications

References 52 publications

Polymorphism in Post-Dichalcogenide Two-Dimensional Materials

Polymorphism in Post-Dichalcogenide Two-Dimensional Materials

Toward Wafer‐Scale Production of 2D Transition Metal Chalcogenides

Imaging how thermal capillary waves and anisotropic interfacial stiffness shape nanoparticle supracrystals

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