2D-MoS2 goes 3D: transferring optoelectronic properties of 2D MoS2 to a large-area thin film

Abstract

The ongoing miniaturization of electronic devices has boosted the development of new post-silicon two-dimensional (2D) semiconductors, such as transition metal dichalcogenides, one of the most prominent materials being molybdenum disulfide (MoS2). A major obstacle for the industrial production of MoS2-based devices lies in the growth techniques. These must ensure the reliable fabrication of MoS2 with tailored 2D properties to allow for the typical direct bandgap of 1.9 eV, while maintaining large-area growth and device compatibility. In this work, we used a versatile and industrially scalable MoS2 growth method based on ionized jet deposition and annealing at 250 °C, through which a 3D stable and scalable material exhibiting excellent electronic and optical properties of 2D MoS2 is synthesized. The thickness-related limit, i.e., the desired optical and electronic properties being limited to 2D single/few-layered MoS2, was overcome in the thin film through the formation of encapsulated highly crystalline 2D MoS2 nanosheets exhibiting a bandgap of 1.9 eV and sharp optical emission. The newly synthesized 2D-in-3D MoS2 structure will facilitate device compatibility of 2D materials and confer superior optoelectronic device function.

Cost-effective synthesis of 2D molybdenum disulfide (MoS2) nanocrystals: An exploration of the influence on cellular uptake, cytotoxicity, and bio-imaging

“…Several studies have suggested that ROS generation and oxidative stress production may be one of the underlying mechanisms, leading to nanoparticle-induced cytotoxicity in different cell types [37][38][39][40]. We analyzed the formation of reactive oxygen species in response to MoS 2 , and found a significant production of ROS in cells at higher doses of MoS These results are also correlated with our result of the cytotoxic effect of particles and could be the cause of cell death seen at higher doses.…”

Molybdenum disulfide (MoS2)-based nanostructures for tissue engineering applications: prospects and challenges

“…13 Among different layered TMDs, molybdenum disulfide (MoS 2 ) has gained tremendous attention owing to its fascinating properties such as ease of synthesis, high catalytic properties, exceptional on/off ratio, satisfactory biocompatibility, and enormous direct band gap of 1.8 eV for the monolayer. 14,15 MoS 2 has achieved prime progress in the field of optoelectronics, 4,16 energy storage 17 and conversion, 18 hydrogen evolution reaction (HER), 19,20 and next-generation switches. 21,22 Moreover, MoS 2 layers are often associated with crystal-dependent fluorescence 23 or the ability to quench fluorescence.…”

“…MoS 2 has achieved prime progress in the field of optoelectronics, 4,16 energy storage 17 and conversion, 18 hydrogen evolution reaction (HER), 19,20 and next-generation switches. 21,22 Moreover, MoS 2 layers are often associated with crystal-dependent fluorescence 23 or the ability to quench fluorescence.…”

Formation and Characterization of Three-Dimensional Tetrahedral MoS2 Thin Films by Chemical Vapor Deposition

“…Nevertheless, various methods have been developed to overcome these drawbacks, including magnetron sputtering, 32 sulfurization of Mo thin films, 29 or ionized jet deposition (IJD). 38 Here, the conventional CVD method has been employed to synthesize the three-dimensional tetrahedral arrangement of micrometer-sized MoS 2 thin films. We also noticed that many works have been published regarding the growth dynamics and various applications of tetrahedral microstructures of MoS 2 in the past few years.…”

“…Nevertheless, various methods have been developed to overcome these drawbacks, including magnetron sputtering, sulfurization of Mo thin films, or ionized jet deposition (IJD) . Here, the conventional CVD method has been employed to synthesize the three-dimensional tetrahedral arrangement of micrometer-sized MoS 2 thin films.…”