Sungkyunkwan University · 材料科学
Professor Young Jae Song's research lab specializes in the development and characterization of two-dimensional (2D) van der Waals heterostructures, with a focus on high-quality, defect-free heteroepitaxial growth of graphene and hexagonal boron nitride (h-BN) films. The lab pioneers in situ fabrication techniques—particularly chemical vapor deposition (CVD)—to create mechanically robust and chemically stable 2D heterostructures such as graphene/h-BN and BN/graphene/BN (BGB) systems, minimizing transfer-related damage and doping. The lab also operates a state-of-the-art ultra-low temperature scanning probe microscopy (SPM) system capable of sub-picometer stability at 10 mK and in high magnetic fields, enabling advanced electronic and quantum transport studies of 2D materials. Their work bridges materials synthesis, advanced characterization, and nanoscale device physics, aiming to establish scalable platforms for next-generation nanoelectronics and quantum devices.
Figures are computed from collected data and may differ slightly.
Direct chemical vapor deposition (CVD) growth of single-layer graphene on CVD-grown hexagonal boron nitride (h-BN) film can suggest a large-scale and high-quality graphene/h-BN film hybrid structure with a defect-free interface. This sequentially grown graphene/h-BN film shows better electronic properties than that of graphene/SiO2 or graphene transferred on h-BN film, and suggests a new promising template for graphene device fabrication.
We describe the design, development and performance of a scanning probe microscopy (SPM) facility operating at a base temperature of 10 mK in magnetic fields up to 15 T. The microscope is cooled by a custom designed, fully ultra-high vacuum (UHV) compatible dilution refrigerator (DR) and is capable of in situ tip and sample exchange. Subpicometer stability at the tip-sample junction is achieved through three independent vibration isolation stages and careful design of the dilution refrigerator.
We describe the successful in situ chemical vapor deposition synthesis of a graphene-based heterostructure in which a graphene monolayer is protected by top and bottom boron nitride films. The boron nitride film/graphene monolayer/boron nitride film (BGB) was found to be a mechanically robust and chemically inert heterostructure, from which the deleterious effects of mechanical transfer processes and unwanted chemical doping under air exposure were eliminated. The chemical compositions of each f
The environmental stability of large-sized and single-crystalline antimony flakes was systematically investigated with temperature and time dependence at fixed humidity. The antimony flakes used in this work were grown by chemical vapor deposition (CVD) directly on SiO2 substrates, where antimonene layers were stacked to a few tens of nm thickness with a typical area of ∼40 μm.
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