Quasi-one-dimensional graphene superlattices formed on high-index surfaces

Lin, Chia‐Chi; Huang, Xiangqian; Ke, Fen; Choi, Jin; Tong, Nai; Yin, Xiuli; Gan, Lin; Guo, Xuefeng; Zhao, Ruo; Yang, Weiping; Wang, Enge; Hu, Zonghai

doi:10.1103/physrevb.89.085416

Cited by 25 publications

(24 citation statements)

References 36 publications

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“…The enlarged STM image across the hypothetical grain boundary (Figure c) shows complicated morphology of graphene on copper surface with Moiré patterns, which consisted of steps (wide bright stripes) and terraces (narrow dark grooves). Regular corrugation shown in region 1 in the inset with a period of 0.6 nm comes from copper steps, congruent with previous report . Thus, any grain‐boundary feature around 1 nm should be visible in this scale if it exists .…”

supporting

confidence: 91%

Seamless Stitching of Graphene Domains on Polished Copper (111) Foil

et al. 2014

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Seamless stitching of graphene domains on polished copper (111) is proved clearly not only at atomic scale by scanning tunnelling microscopy (STM) and transmission electron micoscopy (TEM), but also at the macroscale by optical microscopy after UV-treatment. Using this concept of seamless stitching, synthesis of 6 cm × 3 cm monocrystalline graphene without grain boundaries on polished copper (111) foil is possible, which is only limited by the chamber size.

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supporting

confidence: 91%

Seamless Stitching of Graphene Domains on Polished Copper (111) Foil

et al. 2014

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“…The models examined below can be applied to situations in which the 1DSL potential is controlled by two (top and back) gates, 25,28 or in which the 2D layer is placed on a substrate with an appropriate lattice mismatch. 26,27…”

Section: Introductionmentioning

confidence: 99%

Effect of one-dimensional superlattice potentials on the band gap of two-dimensional materials

Ono

2017

Journal of Applied Physics

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Using the tight-binding approach, we analyze the effect of a one-dimensional superlattice (1DSL) potential on the electronic structure of black phosphorene and transition metal dichalcogenides. We observe that the 1DSL potential results in a decrease of the energy band gap of the two-dimensional (2D) materials. An analytical model is presented to relate the decrease in the direct-band gap to the different orbital characters between the valence band top and conduction band bottom of the 2D materials. The direct-to-indirect gap transition, which occurs under a 1DSL potential with an unequal barrier width, is also discussed.

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“…[ 20 ] Interestingly, graphene grown on high‐index copper surface is able to generate 1D superlattices, modulating the electronic structures of the graphene. [ 21 ] Moreover, charge transfer usually occurs when graphene contacts with copper, due to their different work functions. [ 22 ] These results forebode that 1D electronic potential could be constructed in the system of graphene/high‐index copper foil, which is particularly desirable for organization of polar macromolecules.…”

Section: Figurementioning

confidence: 99%

Pattern‐Potential‐Guided Growth of Textured Macromolecular Films on Graphene/High‐Index Copper

et al. 2021

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Macromolecular films are crucial functional materials widely used in the fields of mechanics, electronics, optoelectronics, and biology, due to their superior properties of chemical stability, small density, high flexibility, and solution‐processing ability. Their electronic and mechanical properties, however, are typically much lower than those of crystalline materials, as the macromolecular films have no long‐range structural ordering. The state‐of‐the‐art for producing highly ordered macromolecular films is still facing a great challenge due to the complex interactions between adjacent macromolecules. Here, the growth of textured macromolecular films on a designed graphene/high‐index copper (Cu) surface is demonstrated. This successful growth is driven by a patterned potential that originates from the different amounts of charge transfer between the graphene and Cu surfaces with, alternately, terraces and step edges. The textured films exhibit a remarkable improvement in remnant ferroelectric polarization and fracture strength. It is also demonstrated that this growth mechanism is universal for different macromolecules. As meter‐scale graphene/high‐index Cu substrates have recently become available, the results open a new regime for the production and applications of highly ordered macromolecular films with obvious merits of high production and low cost.

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Quasi-one-dimensional graphene superlattices formed on high-index surfaces

Cited by 25 publications

References 36 publications

Seamless Stitching of Graphene Domains on Polished Copper (111) Foil

Seamless Stitching of Graphene Domains on Polished Copper (111) Foil

Effect of one-dimensional superlattice potentials on the band gap of two-dimensional materials

Pattern‐Potential‐Guided Growth of Textured Macromolecular Films on Graphene/High‐Index Copper

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