Designer Shape Anisotropy on Transition‐Metal‐Dichalcogenide Nanosheets

Abstract

MoS and generally speaking, the wide family of transition-metal dichalcogenides represents a solid nanotechnology platform on which to engineer a wealth of new and outperforming applications involving 2D materials. An even richer flexibility can be gained by extrinsically inducing an in-plane shape anisotropy of the nanosheets. Here, the synthesis of anisotropic MoS nanosheets is proposed as a prototypical example in this respect starting from a highly conformal chemical vapor deposition on prepatterend substrates and aiming at the more general purpose of tailoring anisotropy of 2D nanosheets by design. This is envisioned to be a suitable configuration for strain engineering as far as strain can be spatially redistributed in morphologically different regions. With a similar approach, both the optical and electronic properties of the 2D transition-metal dichalcogenides can be tailored over macroscopic sample areas in a self-organized fashion, thus paving the way for new applications in the field of optical metasurfaces, light harvesting, and catalysis.

Emerging nanofabrication and quantum confinement techniques for 2D materials beyond graphene

“…MoS 2 films which were deposited on a rippled SiO 2 substrate were shown to exhibit Raman anisotropy. 146 Patterning on prepatterned substrates can enable the study of emerging materials properties associated with strain and shape anisotropy 147 ; however, fabricating electrical or optoelectronic devices from such methods may prove difficult. A lithographic technique to create free-standing metal (e.g., Mo, W, Sn) structures was demonstrated, which can then be sulfurized via a CVD process.…”

A Review CHEMICAL VAPOR DEPOSITION : PROCESS AND APPLICATION

“…Chemical Vapor Deposition telah lama berkembang, seperti literature yang telah kami dapatakan yaitu dari tahun 2000-2018, sudah banyak sekali yang dihasilkan oleh Chemical Vapor Deposition. (61)(62)(63)(64)(65)(66)(67)…”

Real-space light-reflection mapping of atomically thin WSe2 flakes revealing the gradient local strain

“…Recently, many studies have been reported on the strain effect of 2D layered materials [10][11][12]. This effect has been proved that the optical band gap can be tuned by up to several hundred meV/% in atomically thin TMDs by local strain [13].…”