Growth of germanium on Au(111): formation of germanene or intermixing of Au and Ge atoms?

Cantero, E. D.; Solis, Lara M.; Tong, Yongfeng; Fuhr, J. D.; Martiarena, M. L.; Grizzi, O.; Sánchez, Esteban

doi:10.1039/c7cp02949g

Cited by 33 publications

(32 citation statements)

References 25 publications

(25 reference statements)

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“…For example, germanene, a planar germanium allotrope akin to graphene and silicene, is another group-IV elemental 2D crystal. The growth of germanene on Au(111) has been reported, 232,233 following the first synthesis on Pt(111) by molecular beam epitaxy in UHV. 234 However, experimental studies were rarely reported on Raman characterization of germanene, although its vibrational properties have been investigated by means of first-principles calculations.…”

Section: New Research Areas For Uhv-tersmentioning

confidence: 99%

The Expanding Frontiers of Tip-Enhanced Raman Spectroscopy

Schultz

Mahapatra

et al. 2020

Appl Spectrosc

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Section: New Research Areas For Uhv-tersmentioning

confidence: 99%

The Expanding Frontiers of Tip-Enhanced Raman Spectroscopy

Schultz

Mahapatra

et al. 2020

Appl Spectrosc

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“…Theoretical and experimental investigations of graphene-like structures such as silicene and germanene have been vastly carried out [23][24][25][26][27][28]. Silicene and germanene have been grown on Au(111) [29], Ag(111) [30] and Ir(111) [31] that can encourage researchers to do more study about them. Due to the buckled structure of silicene, it has different physical properties compared to graphene, such as higher surface reactivity [30], and a tunable band gap by using an external electric field which is highly favorable in nanoelectronic devices [3,32].…”

Section: Introductionmentioning

confidence: 99%

Carbosilicene and germasilicene: Two 2D materials with excellent structural, electronic and optical properties

Amjadian¹,

Esmaeilzadeh²,

Pournaghavi³

2022

Preprint

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Using first principle calculations, we study the structural, optical and electronic properties of two-dimensional silicene-like structures of CSi 7 (carbosilicene) and GeSi 7 (germasilicene) monolayers. We show that both CSi 7 and GeSi 7 monolayers have different buckling that promises a new way to control the buckling in silicene-like structures. Carbon impurity decreases the silicene buckling, whereas germanium impurity increases it. The CSi 7 has semiconducting properties with 0.25 indirect band gap, but GeSi 7 is a semimetal. Also, under uniaxial tensile strain, the semiconducting properties of CSi 7 convert to metallic properties which shows that CSi 7 can be used in straintronic devices such as strain sensor and strain switch. There is no important response for GeSi 7 under strain. The GeSi 7 has higher dielectric constant relative to CSi 7 , silicene and graphene and it can be used as a 2D-material in high performance capacitors. Calculation of cohesive and formation energies show that CSi 7 is more stable than GeSi 7 . Furthermore, we investigate the optical properties of these new materials and we show that CSi 7 and GeSi 7 can significantly increase the light absorption of silicene. The obtained results can pave a new route for tuning the electronic and optical properties of silicene like structures for different applications in nanoelectronic devices.

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“…However, several issues have recently been raised by different authors regarding the successful synthesis of pure layers of these bidimensional materials, especially when they are grown on metal substrates. [12][13][14][15][16][17][18][19] Therefore, further research is necessary to throw light on this present controversy.Among this vast portfolio of 2D materials, antimonene has received a strong amount of interest due to its attractive properties. It has been theoretically predicted to feature a tunable semiconducting band gap, [20,21] a relatively high carrier mobility [22] or quantum spin Hall effect.…”

mentioning

confidence: 99%

mentioning

confidence: 99%

Unraveling the Highly Complex Nature of Antimony on Pt(111)

Guo

Jiménez-Sánchez

Martínez‐Galera

et al. 2021

Adv Materials Inter

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partially driven to complement and fulfill the absence of electronic band gap in graphene, [5] as this property is technologically relevant in some applications. In this sense, the synthesis of a large number of 2D materials from group IV and V elements like silicene, [6,7] germanene, [8,9] or antimonene [10,11] has been reported in the literature. In particular, metallic substrates have been commonly adopted as the growing support for these novel materials, providing a platform to explore their properties. However, several issues have recently been raised by different authors regarding the successful synthesis of pure layers of these bidimensional materials, especially when they are grown on metal substrates. [12][13][14][15][16][17][18][19] Therefore, further research is necessary to throw light on this present controversy.Among this vast portfolio of 2D materials, antimonene has received a strong amount of interest due to its attractive properties. It has been theoretically predicted to feature a tunable semiconducting band gap, [20,21] a relatively high carrier mobility [22] or quantum spin Hall effect. [23] Experimentally, different methods have been employed to synthesize antimonene. From top-down approaches, few-layer antimonene crystals can be obtained through liquid-phase [24] or mechanical [25] exfoliation. In the latter, thickness down to monolayer can be isolated. [25] Bottomup synthesis also constitutes a versatile method. In particular, the growth of antimonene sheets have been reported by depositing Sb on metal chalcogenides, [26,27] semiconductors, [28] and metal [10,11] substrates. Nevertheless, other studies on the growth and adsorption of Sb on metallic substrates suggest a different nature of Sb atoms. According to these studies, on gold, copper, and silver single-crystal, the experimental results are best explained as a substitutional surface alloy presenting a stacking fault with respect to the underlying metal support. [29][30][31][32][33][34][35][36][37][38][39][40][41][42][43] Such substitutional adsorption of Sb was also theoretically found to be the most energetically favored for Sb compared to on surface sites. [37,[44][45][46] In this article, the growth of Sb on single-crystal Pt(111) has systematically been investigated via a combination of scanning tunneling microscopy (STM), low energy electron diffraction (LEED) and Auger electron spectroscopy (AES) techniques under ultra-high vacuum (UHV) conditions. Pt(111) has been chosen as the substrate since it differs from the coinage metals (Cu, Ag and Au) that have been used in mainly all the studies performed until now. Therefore, understanding the behavior of Understanding the growth behavior of group-V elements on metal surfaces provides valuable information that can shed light on the feasibility of tailoring atomically thin monoelemental 2D polymorphs composed of pnictogens on these metallic substrates. Here, by combining scanning tunneling microscopy (STM), low energy electron diffraction and Auger electron spectroscopy measurements...

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Growth of germanium on Au(111): formation of germanene or intermixing of Au and Ge atoms?

Abstract: ARTICLEThis journal is

Cited by 33 publications

References 25 publications

The Expanding Frontiers of Tip-Enhanced Raman Spectroscopy

The Expanding Frontiers of Tip-Enhanced Raman Spectroscopy

Carbosilicene and germasilicene: Two 2D materials with excellent structural, electronic and optical properties

Unraveling the Highly Complex Nature of Antimony on Pt(111)

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