journal article·2019-10

Unconventional Atomic Structure of Graphene Sheets on Solid Substrates

Jinjin Zhang, Yizhou Yang, Shuo Yang, Jie Song, Ying Wang, Xiaoguo Liu, Qingqing Yang, Yue Shen, Shuo Wang, Haijun Yang, Junhong Lü, Bin Li, Haiping Fang, Ratnesh Lal, Daniel M. Czajkowsky, Jun Hu, Guosheng Shi, Yi Zhang

Small· Volume 15· Issue 42
Publisher page

Abstract

Abstract The atomic structure of free‐standing graphene comprises flat hexagonal rings with a 2.5 Å period, which is conventionally considered the only atomic period and determines the unique properties of graphene. Here, an unexpected highly ordered orthorhombic structure of graphene is directly observed with a lattice constant of ≈5 Å, spontaneously formed on various substrates. First‐principles computations show that this unconventional structure can be attributed to the dipole between the graphene surface and substrates, which produces an interfacial electric field and induces atomic rearrangement on the graphene surface. Further, the formation of the orthorhombic structure can be controlled by an artificially generated interfacial electric field. Importantly, the 5 Å crystal can be manipulated and transformed in a continuous and reversible manner. Notably, the orthorhombic lattice can control the epitaxial self‐assembly of amyloids. The findings reveal new insights about the atomic structure of graphene, and open up new avenues to manipulate graphene lattices.
Source: crossref · Quality: baseline

Research context

OpenAlex topics: Graphene research and applications · Quantum Dots Synthesis And Properties · Supercapacitor Materials and Fabrication

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Zhangjiang Lab Shanghai Advanced Research Institute Chinese Academy of Sciences Shanghai 201210 China

Key Laboratory of Interfacial Physics and Technology Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai 201800 China

Shanghai Applied Radiation Institute Shanghai University Shanghai 200444 China

Institute of Nano Biomedicine and Engineering Shanghai Engineering Research Centre for Intelligent Diagnosis and Treatment Instrument Department of Instrument Science and Engineering School of Electronic Information and Electrical Engineering Shanghai Jiao Tong University Shanghai 200240 China

Materials Science and Engineering University of California, San Diego La Jolla CA 92093 USA

Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province Qinghai Institute of Salt Lakes Chinese Academy of Sciences Xining Qinghai 810008 China

State Key Laboratory for Oncogenes and Bio‐ID Center School of Biomedical Engineering Shanghai Jiao Tong University Shanghai 200240 China

Funding

National Natural Science Foundation of China · Chinese Academy of Sciences

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