Research
Prof. Zonghoon Lee’s Atomic-Scale Electron Microscopy Lab
Research
Abstract
Notwithstanding the numerous density functional studies on the chemically induced transformation of multilayer graphene into a diamond-like film carried out to date, a comprehensive convincing experimental proof of such a conversion is still lacking. We show that the fluorination of graphene sheets in Bernal (AB)-stacked bilayer graphene grown by chemical vapour deposition on a single-crystal CuNi(111) surface triggers the formation of interlayer carbon–carbon bonds, resulting in a fluorinated diamond monolayer (‘F-diamane’). Induced by fluorine chemisorption, the phase transition from (AB)-stacked bilayer graphene to single-layer diamond was studied and verified by X-ray photoelectron, UV photoelectron, Raman, UV-Vis and electron energy loss spectroscopies, transmission electron microscopy and density functional theory calculations.
관련링크
Research fields
Our research focuses on atomic-scale characterization, design, and synthesis as well as the properties of advanced materials including 2D materials, carbon materials, and soft matter by means of aberration-corrected transmission electron microscopy and spectroscopy. In situ experiments at both the atomic and nano scales are implemented for our study.
Advanced TEM CharacterizationAtomic-Scale Defects Study
In Situ TEM Characterization: mechanical, thermal, and electrical experiments
In Situ Gas/Liquid Phase TEM Experiments
Research highlights
Journal covers & artworks
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Quantitative Evaluation of Dislocation Density in Epitaxial GaAs Layer on Si Using Transmission Electron Microscopy -
Atomic resolution imaging of rotated bilayer graphene sheets using a low kV aberration- corrected TEM -
van der Waals epitaxial formation of atomic layered α-MoO3 on MoS2 by oxidation -
Anisotropic Angstrom-Wide Conductive Channels in Black Phosphorous by Top-down Cu Intercalation -
Double-Spiral Hexagonal Boron Nitride and Shear Strained Coalescence Boundary -
In situ STEM study of MoS2 formation on graphene with deep-learning framework -
Hole defects on 2D materials formed by electron beam irradiation: toward nanopore devices -
Atomic Scale Study on Growth and Heteroepitaxy of ZnO Monolayer on Graphene -
Grain Boundary Mapping in Polycrystalline Graphene -
Atomic-scale dynamics of triangular hole growth in monolayer hexagonal boron nitride under electron irradiation -
Antiphase boundaires as faceted metallic wires in two-dimensional transition metal dichalcogenides -
One-dimensional hexagonal boron nitride conducting channel -
Direct Imaging of Soft−Hard Interfaces Enabled by Graphene