Recent Advances of Preparation and Application of Two-Dimension van der Waals Heterostructure

Abstract

With paramount electrical, optical, catalytic, and other physical and chemical properties, van der Waals heterostructures (vdWHs) have captured increasing attention. vdWHs are two-dimension (2D) heterostructures formed via van der Waals (vdW) force, paving the way for fabricating, understanding, and applications of 2D materials. vdWHs materials of large lattice constant difference can be fabricated together, forming a series of unique 2D materials that cannot form heterostructures earlier. Additionally, vdWHs provide a new platform to study the interlayer interactions between materials, unraveling new physics in the system. Notably, vdWHs embody short-range bonds weaker than covalent and ionic bonds, almost only interactions between nearest particles are considered. Owing to a clear interface, vdW interaction between two different components, devices made by vdWHs can bring amazing physicochemical properties, such as unconventional superconductivity, super capacitance in intercalation 2D structure, etc. Recently, impressive progress has been achieved in the controlled preparation of vdWHs and various applications, which will be summarized in this review. The preparation methods comprise mechanical exfoliation, liquid phase stripping, physical vapor deposition, chemical vapor deposition, and metalorganic chemical vapor deposition. The applications sections will focus on photoelectric devices, logic devices, flexible devices, and piezotronics. Finally, some perspectives in the future on the controlled preparation of vdWHs with desired properties for advanced applications will be discussed.

Surface Optics and Color Effects of Liquid Metal Materials

“…Core–shell structures can be fabricated by vapor deposition, including physical vapor deposition (PVD) and chemical vapor deposition (CVD). [ 89 ] PVD involves vaporizing colorful materials by physical methods and transporting them to the surface of LMs by gas. Vaporized colorful materials are deposited on the surface of LMs into colorful shells.…”

Systematic DFT Modeling van der Waals Heterostructures from a Complete Configurational Basis Applied to γ-PC/WS2

“…2,3 Ever since, intense research efforts have been made to explore the novel vdWH material space. 4,5 The class of vdWHs is made up of layered materials that possess atomic layers of varying phases or compositions. As a representative type, bilayer (BL) vdWHs commonly possess a high surface area, remarkable optical and catalytic properties, and spin−orbit coupling.…”

“…The isolation of individual 2D layers was (re)­invented in 2004 by mechanical exfoliation of a single graphene layer . The class of van der Waals heterostructure (vdWH) materials emerged around 2010 with the fabrication of graphene on boron nitride devices. , Ever since, intense research efforts have been made to explore the novel vdWH material space. , …”

“…The class of vdWHs is made up of layered materials that possess atomic layers of varying phases or compositions. As a representative type, bilayer (BL) vdWHs commonly possess a high surface area, remarkable optical and catalytic properties, and spin–orbit coupling. , Moreover, BL vdWHs have been associated with great versatility. This is because the material space starts from a huge number of widely combinable and stable 2D monolayers (MLs).…”

Local dielectric function of hBN-encapsulated WS2 flakes grown by chemical vapor deposition

“…An effective strategy to engineer light-matter interaction in 2D TMDCs, while preserving the benefits arising from their reduced dimensionality, is their integration with other materials in metamaterials or superlattices [16][17][18][19]. By exploiting sequential layer-by-layer assembly, homo-and heterostacks of 2D atomic crystals can be obtained, opening new opportunities for the design and realization of high quality, and, possibly, wafer-scale devices with singular properties [2,17,20,21]. Accordingly, several stacking configurations with various functionalities were recently addressed, such as homo-bilayer TMDCs with different stacking order, i.e.…”