Fabrication of MoS₂ Nanowire Arrays and Layered Structures via the Self‐Assembly of Block Copolymers

Abstract

The electronics industry is beginning to show interest in 2D molybdenum disulfide (2D‐MoS2) as a potential device material due to its low band gap and high mobility. However, current methods for its synthesis are not “fab” friendly and require harsh environments and processes. Here, a novel method to prepare MoS2 nanowire arrays and layered structures via self‐assembly of a block copolymer system is reported. Well‐controlled films of microphase separated line‐space nanopatterns have been achieved by solvent annealing process. The self‐assembled films are used as “templates” for the generation of nonstoichometric molybdenum oxide by in situ inclusion technique following UV/Ozone treatment. Well‐ordered array of MoS2 and a layered structure are then prepared by chemical vapor deposition using sulfur powder at lower temperature. The surface morphology, crystal structure, and phases are examined by different microscopic and spectroscopic techniques. This strategy can be extended to several other 2D materials systems and open the pathway toward better optoelectronic and nanoelectromechanical systems.

Recent Advances in Two-Dimensional Quantum Dots and Their Applications

“…Conversely, atomically thin TMDs have low light absorption, so researchers are working on possible strategies to increase the performance of photodetectors based on TMDs. Subsequently, many researchers proposed various nanostructures such as nanobelts, nanorods, and vertically aligned layers to improve the aspect ratio and light-harvesting abilities of TMDs [98][99][100][101][102]. Another important technique for improving photodetection efficiency is to use heterostructure design or nanoparticle decorations [103,104].…”

Design of Core–Shell Quantum Dots–3D WS2 Nanowall Hybrid Nanostructures with High-Performance Bifunctional Sensing Applications

“…Researchers are seeking strategies to improve the weak performance of TMDC-based photodetectors or other optoelectronic devices. For example, various interesting nanostructures, such as nanobelts, 24 nanorods, 25,26 and vertically aligned layers, 27,28 can be created by different synthesis processes to increase the aspect ratio and lightharvesting property of TMDCs according to previous reports. Meanwhile, utilizing heterostructure design or nanoparticle decorations is another significant method to enhance photodetection performance.…”

“…Researchers are seeking strategies to improve the weak performance of TMDC-based photodetectors or other optoelectronic devices. For example, various interesting nanostructures, such as nanobelts, nanorods, , and vertically aligned layers, , can be created by different synthesis processes to increase the aspect ratio and light-harvesting property of TMDCs according to previous reports. Meanwhile, utilizing heterostructure design or nanoparticle decorations is another significant method to enhance photodetection performance. , In particular, colloidal quantum dots (QDs), which are core–shell semiconducting nanocrystals with tunable and narrow emission wavelengths, have been reported as the sensitizing layer to combine with 2D atomic-layered MoS 2 or other TMDC-based photodetectors in the literature − since QDs can provide high quantum yield, good photostability, and broadband optical absorption features. , Recently, Gough et al .…”

Scalably Nanomanufactured Atomically Thin Materials‐Based Wearable Health Sensors

“…This method could yield many exposed edges that are chemically activated and facilitate the further application of TMDs for gas sensing. Chaudhari et al [ 491 ] demonstrated the fabrication of monolayer and multilayer MoS 2 arrays using BCP lithography and the selective insertion of Mo‐salt into the polystyrene‐block‐poly(4‐vinylpyridine) block. BCP is an emerging lithography technique for low‐cost and high throughput applications.…”