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Lee, Zonghoon
Atomic-Scale Electron Microscopy (ASEM) Lab
Research Interests
  • Advanced Transmission Electron Microscopy (TEM/STEM), in Situ TEM, graphene, 2D materials, low-dimensional crystals, nanostructured materials

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Anisotropic Angstrom-Wide Conductive Channels in Black Phosphorus by Top-down Cu Intercalation

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Title
Anisotropic Angstrom-Wide Conductive Channels in Black Phosphorus by Top-down Cu Intercalation
Author
Lee, Suk WooQiu, LuYoon, Jong ChanKim, YohanLi, DaOh, InseonLee, Gil-HoYoo, Jung-WooShin, Hyung-JoonDing, FengLee, Zonghoon
Issue Date
2021-07
Publisher
AMER CHEMICAL SOC
Citation
NANO LETTERS, v.21, no.14, pp.6336 - 6342
Abstract
Intercalation in black phosphorus (BP) can induce and modulate a variety of the properties including superconductivity like other two-dimensional (2D) materials. In this perspective, spatially controlled intercalation has the possibility to incorporate different properties into a single crystal of BP. We demonstrate anisotropic angstrom-wide (similar to 4.3 angstrom) Cu intercalation in BP, where Cu atoms are intercalated along a zigzag direction of BP because of its inherent anisotropy. With atomic structure, its microstructural effects, arising from the angstrom-wide Cu intercalation, were investigated and extended to relation with macrostructure. As the intercalation mechanism, it was revealed by in situ transmission electron microscopy and theoretical calculation that Cu atoms are intercalated through top-down direction of BP. The Cu intercalation anisotropically induces transition of angstrom-wide electronic channels from semiconductor to semimetal in BP. Our findings throw light on the fundamental relationship between microstructure changes and properties in intercalated BP, and tailoring anisotropic 2D materials at angstrom scale.
URI
https://scholarworks.unist.ac.kr/handle/201301/53969
URL
https://pubs.acs.org/doi/10.1021/acs.nanolett.1c00915
DOI
10.1021/acs.nanolett.1c00915
ISSN
1530-6984
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