Introduction: The production of 2D materials and its derivatives (including substitutional doped 2D materials, stacked van der Waals materials, functionalized 2D materials etc.) controls the upstream of materials research, which usually includes four parts: synthesis, characterization, device fabrication, and theoretical prediction/explanation. Our research involves chemical vapor deposition (CVD) and chemical vapor transport (CVT) to synthesize various kinds of low-dimensional materials, including transitional metal dichalcogenides (pristine and doped), carbon and boron nitride nanotubes, graphene (pristine and doped) etc. Organic coating is also to be used for protecting and functionalizing 2D materials.

Figures: (Top left) The near-1-mm monolayer molybdenum disulfide sample synthesized by halide salt assisted CVD method. (Bottom left) The annular dark field image of V doped MoS2 with V dopant marked by arrows. (Right) A schematic figure of the organic monolayer protecting 2D materials.

References

1. Science Advances, 7:eabj3274 (2021);

2. Nature Electronics 5, 28–36 (2022);

3. PNAS 116, 42 (2019);

Introduction: Metal-semiconductor contact has been one of the most important topics in nano electronics. We are trying to reduce the contact resistance so that monolayer semiconductor can potentially be used as the next generation semiconductor material. Please read this introduction for more information.

Figures: A schematic diagram shows the transistor structure with a monolayer MoS2 as the channel material and metal electrodes (source and drain) in contact.

References

1. Nature, 593, 211–217 (2021);