Bulletin of the American Physical Society
APS March Meeting 2018
Volume 63, Number 1
Monday–Friday, March 5–9, 2018; Los Angeles, California
Session A40: Graphene Properties
8:00 AM–11:00 AM,
Monday, March 5, 2018
LACC
Room: 501C
Sponsoring
Unit:
DCMP
Chair: Qiong Ma, Massachusetts Institute of Technology-MIT
Abstract ID: BAPS.2018.MAR.A40.15
Abstract: A40.00015 : Spatially resovled photoemission studies on aligned square graphene sheets grown on copper substrate
10:48 AM–11:00 AM
Presenter:
Haifeng Yang
(School of Physical Science and Technology, ShanghaiTech University)
Authors:
Haifeng Yang
(School of Physical Science and Technology, ShanghaiTech University)
Cheng Chen
(Department of Physics, University of Oxford)
Huan Wang
(Peking University)
Zhongkai Liu
(School of Physical Science and Technology, ShanghaiTech University)
Yulin Chen
(Department of Physics, University of Oxford)
Recently, commercially available copper foil has become an efficient and inexpensive catalytic substrate for scalable growth of large-area graphene films. Interestingly, despite its hexagonal honeycomb lattice, graphene can be grown into large aligned square-shaped sheets on copper foil. Here, by applying angle-resolved photoemission spectroscopy with submicron spatial resolution (micro-ARPES) to study the three-dimensional electronic structures of square graphene sheets grown on copper foils, we verified the high quality of individual square graphene sheets as well as their merged regions (with aligned orientations). Furthermore, by simultaneously measuring the graphene sheets and their substrate copper foil, we not only established the (001) copper surface structure, but also discovered that the square graphene sheets' sides align with the <110> copper direction, suggesting an important role of copper substrate in the growth of square graphene sheets – which will help the development of effective methods to synthesize high-quality large-size regularly shaped graphene sheets for future applications. This work also demonstrates the effectiveness of micro-ARPES in exploring low-dimensional materials down to atomic thickness and sub-micron lateral size.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.MAR.A40.15
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