Atomically thin gallium layers from solid-melt exfoliation

Kochat, Vidya; Samanta, Atanu; Zhang, Yuan; Bhowmick, Sanjit; Manimunda, Praveena; Asif, S. A. Syed; Stender, Anthony S.; Vajtai, Róbert; Singh, Abhishek K.; Tiwary, Chandra Sekhar; Ajayan, Pulickel M.

doi:10.1126/sciadv.1701373

Cited by 183 publications

(198 citation statements)

References 85 publications

(90 reference statements)

Supporting

Mentioning

192

Contrasting

Order By: Relevance

“…In 2018, Kochat et al ingeniously used the low melting point of gallium to produce gallenene with atomic thickness. They first formed gallium droplets by heating, then droplets are contacted briefly with Si/SiO 2 substrates at temperature of its melting point, and separated . Gallium on the substrate will form gallenene when it is cooled and solidified in liquid layer.…”

Section: Classification Of 2d Crystalsmentioning

confidence: 99%

2D Crystal–Based Fibers: Status and Challenges

Meng

Kong

et al. 2019

Small

View full text Add to dashboard Cite

2D crystals are emerging new materials in multidisciplinary fields including condensed state physics, electronics, energy, environmental engineering, and biomedicine. To employ 2D crystals for practical applications, these nanoscale crystals need to be processed into macroscale materials, such as suspensions, fibers, films, and 3D macrostructures. Among these macromaterials, fibers are flexible, knittable, and easy to use, which can fully reflect the advantages of the structure and properties of 2D crystals. Therefore, the fabrication and application of 2D crystal–based fibers is of great importance for expanding the impact of 2D crystals. In this Review, 2D crystals that are successfully prepared are overviewed based on their composition of elements. Subsequently, methods for preparing 2D crystals, 2D crystals dispersions, and 2D crystal–based fibers are systematically introduced. Then, the applications of 2D crystal–based fibers, such as flexible electronic devices, high‐efficiency catalysis, and adsorption, are also discussed. Finally, the status‐of‐quo, perspectives, and future challenges of 2D crystal–based fibers are summarized. This Review provides directions and guidelines for developing new 2D crystal–based fibers and exploring their potentials in the fields of smart wearable devices.

show abstract

Section: Classification Of 2d Crystalsmentioning

confidence: 99%

2D Crystal–Based Fibers: Status and Challenges

Meng

Kong

et al. 2019

Small

View full text Add to dashboard Cite

show abstract

“…However, 2D materials with metallic bonding are largely unexplored. Some metals are known to form 2D structures on supports, including K on graphene [17][18][19], Pb and In on Si(111) [20], Hf on Ir(111) [21], Sn on Bi 2 Te 3 (111) [22], Rh on polyvinylpyrrolidone [23], and Ga on multiple substrates [24]. Compared to covalent 2D materials, metallic bonding prefers close-packed structures, not layered ones.…”

Section: Introductionmentioning

confidence: 99%

Atlas for the properties of elemental two-dimensional metals

2018

View full text Add to dashboard Cite

Common two-dimensional (2D) materials have a layered 3D structure with covalently bonded, atomically thin layers held together by weak van der Waals forces. However, in a recent transmission electron microscopy experiment, atomically thin 2D patches of iron were discovered inside a graphene nanopore. Motivated by this discovery, we perform a systematic density-functional study on atomically thin elemental 2D metal films, using 45 metals in three lattice structures. Cohesive energies, equilibrium distances, and bulk moduli in 2D are found to be linearly correlated to the corresponding 3D bulk properties, enabling the quick estimation of these values for a given 2D metal and lattice structure. In-plane elastic constants show that most 2D metals are stable in hexagonal and honeycomb, but unstable in square 2D structures. Many 2D metals are surprisingly stable against bending.

show abstract

“…This was extended by Feng et al where the as‐grown β 12 borophene sheets on Ag (111) with rectangular unit cell showed a structural phase transition at 650K to the χ 3 ‐phase with in‐plane zig‐zag atomic arrangement . Among other group III elements, Kochat et al demonstrated exfoliation techniques to isolate atomically tin gallium, or gallenene, along the a and b crystallographic directions from melting droplet of bulk crystal near room temperature ( T m of Ga = 30 °C) . The exfoliated sheets displayed metallic conductivity and compatibility with a variety of substrates along with inducing a 2H‐1T structural phase transition when coupled as a heterostructure with monolayer MoS 2 .…”

Section: Synthesis Of Elemental 2d Materialsmentioning

confidence: 90%

“…Copyright 2017, American Physical Society. Images for “Buckled‐Ga” (Group III) and “Planar” (Group IV): Reproduced with permission . Copyright 2018, The Authors, published by American Association for the Advancement of Science (AAAS).…”

Section: Crystal Allotropes Of Elemental 2d Materialsmentioning

confidence: 99%

See 1 more Smart Citation

Emerging Applications of Elemental 2D Materials

et al. 2019

Self Cite

View full text Add to dashboard Cite

As elemental main group materials (i.e., silicon and germanium) have dominated the field of modern electronics, their monolayer 2D analogues have shown great promise for next‐generation electronic materials as well as potential game‐changing properties for optoelectronics, energy, and beyond. These atomically thin materials composed of single atomic variants of group III through group VI elements on the periodic table have already demonstrated exciting properties such as near‐room‐temperature topological insulation in bismuthene, extremely high electron mobilities in phosphorene and silicone, and substantial Li‐ion storage capability in borophene. Isolation of these materials within the postgraphene era began with silicene in 2010 and quickly progressed to the experimental identification or theoretical prediction of 15 of the 18 main group elements existing as solids at standard pressure and temperatures. This review first focuses on the significance of defects/functionalization, discussion of different allotropes, and overarching structure–property relationships of 2D main group elemental materials. Then, a complete review of emerging applications in electronics, sensing, spintronics, plasmonics, photodetectors, ultrafast lasers, batteries, supercapacitors, and thermoelectrics is presented by application type, including detailed descriptions of how the material properties may be tailored toward each specific application.

show abstract

Atomically thin gallium layers from solid-melt exfoliation

Abstract: A unique way to synthesize innovative 2D gallenene.

Cited by 183 publications

References 85 publications

2D Crystal–Based Fibers: Status and Challenges

2D Crystal–Based Fibers: Status and Challenges

Atlas for the properties of elemental two-dimensional metals

Emerging Applications of Elemental 2D Materials

Contact Info

Product

Resources

About