Rolling up transition metal dichalcogenide nanoscrolls via one drop of ethanol

Cui, Xueping; Kong, Zhizhi; Gao, Enlai; Huang, Dazhen; Yang, Hao; Shen, Hui; Di, Chong‐an; Xu, Zhiping; Zheng, Jian; Zhu, Daoben

doi:10.1038/s41467-018-03752-5

Cited by 139 publications

(231 citation statements)

References 37 publications

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“…These narrow lines were recorded in the spectral range of ≈50 meV; thus, a large‐scale set of relatively uniform single‐photon emitters can be formed using such approach. Another interesting example is nanoscrolls produced by rolling up a MoS 2 monolayer within a drop of ethanol . The direct exciton emission from such nanoscrolls was registered with excitation by a 532‐nm laser line.…”

Section: Basic Optical Properties Of Tmd Nanotubes and Related Curvedmentioning

confidence: 99%

“…For other vdW tubular structures, the situation was different. For instance, the emission was observed from HfS 2 NTs, boron nitride NTs, and also from the nanoscrolls fabricated by rolling up the MoS 2 and WS 2 monolayers. On the contrary, the studies of chemically synthesized MoS 2 and WS 2 NTs were focused on such characteristics of tubes ensembles as absorption and optical limiting, that is, nonlinear saturation of light transmittance at high incident intensities .…”

Section: Introductionmentioning

confidence: 99%

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Excitonic Emission in van der Waals Nanotubes of Transition Metal Dichalcogenides

et al. 2019

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Nanotubes (NTs) of transition metal dichalcogenides (TMDs), were first synthesized more than a quarter of a century ago; nevertheless, many of their optical properties have so far remained basically unknown. Herein, the state of the art in the knowledge of the optical properties of TMD NTs is presented. First, general properties of multilayered crystals are evaluated, and available data on related NTs are analyzed. Then, the technology for the formation and the structural characteristics of NTs are represented, focusing on the structures synthesized by chemical transport reaction. The core of this work is the presentation of the ability of synthesized TMD NTs to emit bright photoluminescence (PL), which has been discovered recently. By means of micro-PL spectroscopy of individual tubes, we show that excitonic transitions relevant to both direct and indirect band gaps contribute to the emission spectra of the NTs despite having the dozens of monolayers in their walls. The performance of the tubes as efficient optical resonators is highlighted, where confined optical modes strongly affect the emission. Finally, a brief conclusion is presented, along with an outlook of the future studies of this novel radiative member of the NTs family, which have unique potential for different nanophotonics applications.

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Section: Basic Optical Properties Of Tmd Nanotubes and Related Curvedmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Excitonic Emission in van der Waals Nanotubes of Transition Metal Dichalcogenides

et al. 2019

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“…Importantly, these nanoscrolls not only hold the 2D characteristics, but also possess some new properties, just like the gapless and topological structure at the ends and interlayer galleries of graphene nanoscrolls . Similarly, nanoscrolls based on another type of representative 2D material,transition‐metal dichalcogenides (TMDCs) with a wider bandgap, show higher mobility with larger current density and better environmental stability than the monolayer triangle sheets . Benefiting from these features, MoS 2 and WS 2 nanoscrolls have improved photosensitivity than the 2D counterparts, presenting potential in the optoelectronic application.…”

Section: Introductionmentioning

confidence: 99%

High‐Performance Photodiode Based on Atomically Thin WSe₂/MoS₂ Nanoscroll Integration

Deng

You

Chen

et al. 2019

Small

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Self‐assembled structures of 2D materials with novel physical and chemical properties, such as the good electrical and optoelectrical performance in nanoscrolls, have attracted a lot of attention. However, high photoresponse speed as well as high responsivity cannot be achieved simultaneously in the nanoscrolls. Here, a photodiode consisting of single MoS2 nanoscrolls and a p‐type WSe2 is demonstrated and shows excellent photovoltaic characteristics with a large open‐circuit voltage of 0.18 V and high current intensity. Benefiting from the heterostructure, the dark current is suppressed resulting in an increased ratio of photocurrent to dark current (two orders of magnitude higher than the single MoS2 nanoscroll device). Furthermore, it yields high responsivity of 0.3 A W−1 (corresponding high external quantum efficiency of ≈75%) and fast response time of 5 ms, simultaneously. The response speed is increased by three orders of magnitude over the single MoS2 nanoscroll device. In addition, broadband photoresponse up to near‐infrared could be achieved. This atomically thin WSe2/MoS2 nanoscroll integration not only overcomes the disadvantage of MoS2 nanoscrolls, but also demonstrates a single nanoscroll‐based heterostructure with high performance, promising its potential in the future optoelectronic applications.

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“…Later on, Patra et al predicted that water nanodroplets could also guide the folding and rolling of planar graphene sheets, where the scrolling results from the interaction between capillarity and elasticity, and this prediction was then experimentally confirmed . More recently, Cui et al reported the rolling of transition metal dichalcogenides (TMDs) with the assistance of aqueous solutions such as ethanol. The fabricated nanoscrolls demonstrated obvious photoluminescence and stability in different atmospheres.…”

Section: Release Methodsmentioning

confidence: 99%

Section: Release Methodsmentioning

confidence: 99%

Rolled‐up Nanotechnology: Materials Issue and Geometry Capability

Huang

et al. 2018

Adv Materials Technologies

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chemical vapor deposition (CVD). When it comes to on-chip integrations, these strategies are limited by accessible materials and slow processing rate, [31] and the generated defects in the produced amorphous materials placed restrictions to its further applications in high-performance devices. [32] Therefore, novel approaches and methods of fabricating 3D micro/ nanostructures are highly demanded.Rolled-up nanotechnology is an alternative technique that fabricates 3D nanostructures out of planar films called nanomembranes. Nanomembranes are defined as planar thin films with thicknesses between one to a few hundred nanometers. [33] These nanomembrane materials behave like soft materials while maintaining excellent properties like their bulk counterpart and therefore is an ideal platform for fabricating 3D nanostructures. Inspired by concepts of origami and kirigami, [34][35][36][37] researchers folded and rolled these nanomembranes into a number of fascinating 3D structures. [17,[38][39][40][41][42][43][44] Several review articles have been published with emphasis on nanomembranes thinning and manufacture, mechanical deformation, fundamental studies, and their practical applications. [33,41,[45][46][47] By releasing strain-engineered planar functional nanomembranes on sacrificial layers, complex rolled-up structures including tubes, [48][49][50][51][52][53][54] rings, [54][55][56] and helices [42,[57][58][59] can be constructed (for instance, see Figure 1f). This approach can be applied to engineer a wide range of organic and inorganic materials and their combinations, including metals, insulators, traditional semiconductor families, and recently emerged 2D materials. Given its compatibility to standard CMOS fabrication process and ability to manufacture large periodic arrays with precise geometric control, rolled-up nanotechnology further expands the applications of 3D nanostructures to a number of areas, including optical resonators, [60,61] photodetectors, [62,63] micromotors, [64][65][66] energy storage, [67] drug delivery, [68] gas detection, [53] and environmental decontamination. [69] The versatility in the materials design and geometric tuning in rolled-up nanotechnology presents tremendous opportunities for further developing sophisticated 3D fine structures.In this review, we focus on the materials perspective and fabrication process of rolled-up nanotechnology. First, we give a brief introduction of rolled-up mechanism, as well as its fabrication techniques and control strategies. We summarize and highlight recent advances of different materials systems and their corresponding rolling methodologies. Second, Rolled-up nanotechnology is an appealing technique that tunes planar films into complex 3D fine structures. The rolling-up mechanism and methodology of a huge variety of materials and their combinations are summarized, including metals, insulators, traditional semiconductor families, polymers, and recently emerged 2D materials. The basic principles of strain induction, fabrication methods, and techni...

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Rolling up transition metal dichalcogenide nanoscrolls via one drop of ethanol

Cited by 139 publications

References 37 publications

Excitonic Emission in van der Waals Nanotubes of Transition Metal Dichalcogenides

Excitonic Emission in van der Waals Nanotubes of Transition Metal Dichalcogenides

High‐Performance Photodiode Based on Atomically Thin WSe₂/MoS₂ Nanoscroll Integration

Rolled‐up Nanotechnology: Materials Issue and Geometry Capability

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Rolling up transition metal dichalcogenide nanoscrolls via one drop of ethanol

Cited by 139 publications

References 37 publications

Excitonic Emission in van der Waals Nanotubes of Transition Metal Dichalcogenides

Excitonic Emission in van der Waals Nanotubes of Transition Metal Dichalcogenides

High‐Performance Photodiode Based on Atomically Thin WSe2/MoS2 Nanoscroll Integration

Rolled‐up Nanotechnology: Materials Issue and Geometry Capability

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High‐Performance Photodiode Based on Atomically Thin WSe₂/MoS₂ Nanoscroll Integration