Top-down exfoliation
Keywords : Intercalation-assisted liquid-phase exfoliation, hBN, Nanosheets, Solution-processed thin films
This research focuses on a top-down strategy to convert 3D bulk hexagonal boron nitride (hBN) into 2D hBN nanosheets via intercalation-assisted liquid-phase exfoliation. By promoting interlayer expansion and solution processability, we aim to obtain highly dispersed and stable hBN nanosheet suspensions. The exfoliated nanosheets are further assembled into uniform thin films, enabling scalable integration as functional coatings and insulating/thermal-management layers for diverse applications.
Hydrothermal synthesis
Keywords : Bottom-up, Phase-controlled fabrication, Reaction parameter optimization, FeS, Nanomaterials
Hydrothermal synthesis has emerged as a versatile synthesis method of inorganic nanomaterials with high crystallinity and controlled morphology. These unique subcritical or supercritical conditions enable the synthesis of metastable phases and complex structures, including low-dimensional iron sulfides (FeS) such as mackinawite and pyrite. This research focuses on optimizing reaction parameters, including temperature, pressure, and precursor concentration, to achieve precise control over the structural and electronic properties of the synthesized nanomaterials.
Chemical Vapor Deposition (CVD)
Keywords : Bottom-up, FeS, MoS2, Substrate engineering
Our research group investigates substrate engineering–driven growth mechanisms and controllable synthesis of two-dimensional (2D) materials using chemical vapor deposition (CVD). By systematically tuning substrate properties, including surface energy, crystallographic orientation, and chemical composition, we achieve precise control over nucleation density, crystal morphology, thickness, and orientation of 2D nanostructures. Our research explores the growth behavior of 2D materials on various substrates, including SiO₂/Si, sapphire (Al₂O₃), and Au foils, revealing strong substrate–material interactions that govern anisotropic growth, epitaxial alignment, and morphology evolution. Furthermore, we investigate the electrical and magnetic properties of the synthesized materials, providing insights into their potential for future electronic, spintronic, and functional device applications.
Transfer
Keywords : PMMA, PDMS, Polymer-assisted transfer
Two-dimensional (2D) materials grown on substrates require transfer to alternative substrates for characterization and device fabrication. In our research group, various polymer-assisted transfer methods based on PMMA, PDMS, and PC are selectively adopted depending on the properties of the target substrate. By optimizing these transfer strategies, we minimize sample damage while ensuring high reproducibility. Furthermore, 2D materials can be reliably transferred onto a wide range of substrates, enabling comprehensive characterization and minimizing substrate-induced effects for device applications.