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Interface-Confined Doubly Anisotropic Oxidation of Two-Dimensional MoS2
Yejin Ryu, Wontaek Kim, Seonghyun Koo +4
Despite their importance, chemical reactions confined in a low dimensional space are elusive and experimentally intractable. In this work, we report doubly anisotropic, in-plane an…
On-Stack Two-Dimensional Conversion of MoS2 into MoO3
Taeg Yeoung Ko, Areum Jeong, Wontaek Kim +10
Chemical transformation of existing two-dimensional (2D) materials can be crucial in further expanding the 2D crystal palette required to realize various functional heterostructure…
Varying Electronic Coupling at Graphene-Copper Interfaces Probed with Raman Spectroscopy
Jieun Choi, Seonghyun Koo, Myeongin Song +3
As the synthesis of graphene on copper became one of the primary preparation methods for both fundamental research and industrial application, Raman spectra of graphene/Cu systems…
Crossover between Photochemical and Photothermal Oxidations of Atomically Thin Magnetic Semiconductor CrPS4
Suhyeon Kim, Jinhwan Lee, Gangtae Jin +3
Many two-dimensional (2D) semiconductors represented by transition metal dichalcogenides have tunable optical bandgaps in the visible or near IR-range standing as a promising candi…
Structural and optical properties of single- and few-layer magnetic semiconductor CrPS4
Jinhwan Lee, Taeg Yeoung Ko, Jung Hwa Kim +7
Atomically thin binary 2-dimensional (2D) semiconductors exhibit diverse physical properties depending on their composition, structure and thickness. By adding another element in t…
Second-Harmonic Young Interference in Atom-Thin Heterocrystals
Wontaek Kim, Je Yhoung Ahn, Juseung Oh +2
Optical second-harmonic generation (SHG) is a nonlinear parametric process that doubles the frequency of incoming light. Only allowed in non-centrosymmetric materials, it has been…