Single-domain epitaxial silicene on diboride thin films

Fleurence, Antoine; Gill, Tobias G.; Friedlein, Rainer; Sadowski, Jerzy; Aoyagi, K.; Copel, M.; Tromp, R. M.; Hirjibehedin, Cyrus F.; Yamada‐Takamura, Yukiko

doi:10.1063/1.4945370

Cited by 19 publications

(31 citation statements)

References 29 publications

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“…Bias voltages applied between the tip and sample are quoted using sample bias convention. Evidence for the silicene striped domains is also observed in low-energy electron diffraction (LEED) measurements, [46] indicating that the domains are not induced by the bias voltages applied during STM measurements. Spectroscopic measurements were performed by applying a modulation voltage of 15 mV to the bias voltage and using a lock-in amplifier at a frequency of ≈550 Hz to measure the differential conductance dI/dV.…”

Section: Methodsmentioning

confidence: 89%

Guided Molecular Assembly on a Locally Reactive 2D Material

et al. 2017

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occurs when 2D materials are placed on a substrate, such as when they are epitaxially grown upon a metallic surface. [11,12] For example, it has been shown that molecules can become trapped within nanopores of hexagonal boron nitride grown on Ru (0001) because of dipolar interactions; [13,14] similar results have also been observed for nanopores on the surface of bulk SiC. [15] Physisorption of a molecule to a surface (i.e., van der Waals bonding) is often not strong enough to fix the molecule's position at room temperature, particularly on the surface of bulk metal crystals. This is more readily accomplished by anchoring the mole cule to the surface through chemisorption of part of the molecule to the surface. [16][17][18] However, care must be taken to limit hybridization that can cause detrimental modifications of the molecule and its frontier orbitals, [19,20] especially on different surface reconstructions of bulk semiconductors like silicon. [15,17] It is therefore of interest to investigate the interface between molecules and more reactive 2D materials in an attempt to isolate individual molecules at room temperature while retaining their localized electronic states.With its mixed sp 2 -sp 3 character, silicene-the silicon analogue of graphene-has the potential to provide unique properties for molecular templating. This is particularly true because the structural and electronic properties of silicene are more susceptible to modification [21][22][23][24][25][26] once it is formed upon a surface, owing to its greater reactivity than graphene and the flexibility of The interactions between atomic or molecular adsorbates and the surfaces of 2D materials are of interest for applications ranging from catalysis [1] and molecular sensing [2] to molecular electronics and spintronics. [3][4][5] For the prototypical 2D material graphene, there are typically only weak van der Waals interactions between molecules and the surface. [6] This allows for the fabrication of functional self-assembled monolayers [6][7][8] that are reminiscent of the ordered supramolecular arrangements that can be formed on the surfaces of bulk (3D) materials. [9] However, isolating individual molecules is more challenging. [10] In contrast, new possibilities for templating emerge from nanostructuring that

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Section: Methodsmentioning

confidence: 89%

Guided Molecular Assembly on a Locally Reactive 2D Material

et al. 2017

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“…Binary alloy could also be a great candidate for their synthesis. Silicene has been found to exist in epitaxial forms on ZrB 2 (0001) [49,50] and ZrC (111) [51]. Meanwhile, binary alloys here were chosen to stabilize silicene films due to their non-negligible interactions, rather than their catalytic performance during the synthesis process.…”

Section: Surfaces 2020 3 For Peer Review 6 Of 14mentioning

confidence: 99%

Overview of Rational Design of Binary Alloy for the Synthesis of Two-Dimensional Materials

Zhang

Shi

et al. 2020

Surfaces

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Two-dimensional (2D) materials attracted widespread interest as unique and novel properties different from their bulk crystals, providing great potential for semiconductor devices and applications. Recently, the family of 2D materials has been expanded including but not limited to graphene, hexagonal boron nitride (h-BN), transition metal carbides (TMCs), and transition metal dichalcogenides (TMDCs). Metal-catalyzed chemical vapor deposition (CVD) is an effective method to achieve precise synthesis of these 2D materials. In this review, we focus on designing various binary alloys to realize controllable synthesis of multiple CVD-grown 2D materials and their heterostructures for both fundamental research and practical applications. Further investigations indicated that the design of the catalytic substrate is an important issue, which determines the morphology, domain size, thickness and quality of 2D materials and their heterostructures.

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“…The 2D structure of monolayer silicene is expected to confer various unique characteristics, such as tunable band gaps 1) , a quantum spin Hall effect 2) , high-temperature superconductivity 3) , and giant magnetoresistance 4) . However, despite recent progress in the epitaxial synthesis of silicene and investigation of its electronic properties [5][6][7][8][9][10][11][12][13] , poor air stability has prevented its application in devices 14) . By reacting CaSi 2 and BF -4 -based ionic liquid, Yaokawa et al 15) recently fabricated a 2D linked silicon network of bilayer silicene (BLSi) sandwiched between CaF 2 crystals.…”

Section: Introductionmentioning

confidence: 99%

Growth and fluorination of CaSi₂ thin film

Ito

Ohsuna

Suemasu

et al. 2020

Jpn. J. Appl. Phys.

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We fabricated bilayer silicene (BLSi) from an epitaxial CaSi 2 thin film grown on a Si (111) substrate followed by treatment with BF -4 -based ionic liquid. First, a 6R-CaSi 2 thin film was grown from simultaneously supplied Ca and Si sources. After reacting the CaSi 2 thin film with BF -4 -based ionic liquid, the BLSi was formed. The reaction proceeded laterally along the CaSi 2 layer. The rearrangement of the Si and Ca atomic layers in the CaSi 2 thin film was investigated by high-angle annular dark-field scanning transmission electron microscope images.

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Single-domain epitaxial silicene on diboride thin films

Cited by 19 publications

References 29 publications

Guided Molecular Assembly on a Locally Reactive 2D Material

Guided Molecular Assembly on a Locally Reactive 2D Material

Overview of Rational Design of Binary Alloy for the Synthesis of Two-Dimensional Materials

Growth and fluorination of CaSi₂ thin film

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Single-domain epitaxial silicene on diboride thin films

Cited by 19 publications

References 29 publications

Guided Molecular Assembly on a Locally Reactive 2D Material

Guided Molecular Assembly on a Locally Reactive 2D Material

Overview of Rational Design of Binary Alloy for the Synthesis of Two-Dimensional Materials

Growth and fluorination of CaSi2 thin film

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Growth and fluorination of CaSi₂ thin film