Synthesis of high quality two-dimensional materials via chemical vapor deposition

Yu, Jiancheng; Li, Jie; Zhang, Wen Feng; Chang, Haixin

doi:10.1039/c5sc01941a

Cited by 233 publications

(156 citation statements)

References 90 publications

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“…Today, the 'scotch tape method' is the most used method [12][13][14][15][16] to prepare monolayers (MLs) of WSe 2 from its bulk counterpart. However, WSe 2 layers have been also fabricated using chemical exfoliation [17][18][19], chemical vapor deposition (CVD) [20][21][22][23][24], metal-organic chemical vapor deposition (MOCVD) [25], hydrothermal exfoliation [26], liquid exfoliation [27][28][29], and physical vapor deposition [30,31]. Due to the existence of these various fabrication techniques, the focus has now shifted to the production of highquality MLs [16,32,33].…”

Section: Introductionmentioning

confidence: 99%

Influence of the substrate material on the optical properties of tungsten diselenide monolayers

et al. 2017

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Monolayers of transition-metal dichalcogenides such as WSe 2 have become increasingly attractive due to their potential in electrical and optical applications. Because the properties of these 2D systems are known to be affected by their surroundings, we report how the choice of the substrate material affects the optical properties of monolayer WSe 2 . To accomplish this study, pump-density-dependent micro-photoluminescence measurements are performed with time-integrating and time-resolving acquisition techniques. Spectral information and power-dependent mode intensities are compared at 290K and 10K for exfoliated WSe 2 on SiO 2 /Si, sapphire (Al 2 O 3 ), hBN/Si 3 N 4 /Si, and MgF 2 , indicating substrate-dependent appearance and strength of exciton, trion, and biexciton modes. Additionally, one CVD-grown WSe 2 monolayer on sapphire is included in this study for direct comparison with its exfoliated counterpart. Time-resolved micro-photoluminescence shows how radiative decay times strongly differ for different substrate materials. Our data indicates exciton-exciton annihilation as a shortening mechanism at room temperature, and subtle trends in the decay rates in correlation to the dielectric environment at cryogenic temperatures. On the measureable time scales, trends are also related to the extent of the respective 2D-excitonic modes' appearance. This result highlights the importance of further detailed characterization of exciton features in 2D materials, particularly with respect to the choice of substrate.

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Section: Introductionmentioning

confidence: 99%

Influence of the substrate material on the optical properties of tungsten diselenide monolayers

et al. 2017

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“…The precursors containing carbon or its species (such as hexane) are carrier gases used for graphene synthesis by the CVD method. Although, many substrates are used in this method, Cu foil is easy to find, compatible with process and cheap …”

Section: Introductionmentioning

confidence: 51%

Few‐layer graphene coated on indium tin oxide electrodes prepared by chemical vapor deposition and their enhanced glucose electrooxidation activity

2019

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At present, few‐layer graphene is deposited on copper (Cu) foil by chemical vapor deposition (CVD) method. Then, the few‐layer graphenes produced on the Cu foil are coated onto the indium tin oxide (ITO) electrode to investigate their glucose electrooxidation activities. Hexane and hydrogen flow rate and deposition time parameters with CVD method are examined on different Cu foils. These electrodes are characterized by scanning electron microscopy‐energy dispersive X‐ray analysis (SEM‐EDX), X‐ray photoelectron spectroscopy (XPS), and Raman spectroscopy. Furthermore, glucose electrooxidation is examined with cyclic voltammetry (CV), chronoamperometry (CA), and electrochemical impedance spectroscopy (EIS) measurements. One could note that the graphene network is clearly visible from SEM images. The deconvoluted XPS spectrum indicates that carbon appeared in the form of non‐oxygenated ring C atoms for few‐layer graphene. The few‐layer graphene structure is confirmed by Raman analysis. Few‐layer graphene/ITO produced at 5 sccm Hexane and 50 sccm hydrogen flow rate and 20 minutes deposition time (G7/ITO) reveals the best electrode activity. The specific activity of G7/ITO electrode is obtained as 6.58 mA cm−2. According to CV, CA, and EIS results, G7/ITO electrode has high electrocatalytic activity, stability, and resistance in comparison with other electrodes.

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“…Another well‐known example of the bottom‐up approach is the CVD growth of 2D inorganic nanosheets . This method involves the reaction and/or decomposition of vapor phase precursors on preselected substrates at high temperature under inert atmosphere . The structural and physicochemical properties of the CVD‐grown nanosheets can finely be tuned by controlling growth parameters such as precursor, reaction temperature, substrate properties, and atmosphere .…”

Section: Synthesis Of 2d Inorganic Nanosheetsmentioning

confidence: 99%

“…[5] This method involvest he reaction and/or decomposition of vapor phase precursors on preselected substrates at high temperature under inert atmosphere. [70] Thes tructurala nd physicochemical properties of the CVD-grown nanosheets can finely be tuned by controlling growth parameters such as precursor,r eaction temperature, substrate properties,a nd atmosphere. [70] Using this method, 2D inorganic nanosheets with scalable size andq uantity,c ontrollable thickness, high purity and crystallinity,a nd lower defects can be obtained.H owever,t he need of suitable substrate, high temperature, and inert atmosphere impedes its wide scale use for the production of 2D inorganic nanosheets.…”

Section: Bottom-up Approachmentioning

confidence: 99%

“…[70] Thes tructurala nd physicochemical properties of the CVD-grown nanosheets can finely be tuned by controlling growth parameters such as precursor,r eaction temperature, substrate properties,a nd atmosphere. [70] Using this method, 2D inorganic nanosheets with scalable size andq uantity,c ontrollable thickness, high purity and crystallinity,a nd lower defects can be obtained.H owever,t he need of suitable substrate, high temperature, and inert atmosphere impedes its wide scale use for the production of 2D inorganic nanosheets. Up to now,m any kinds of inorganic nanosheets of TMDs (SnS 2 , MoS 2 ,M oSe 2 ,W S 2 ,W Se 2 ,M oS 2x Se 2(1Àx) ,M o x W 1Àx S 2 ), [57] metal chalcogenides (GeS, GaSe, etc.…”

Section: Bottom-up Approachmentioning

confidence: 99%

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Recent Applications of 2D Inorganic Nanosheets for Emerging Energy Storage System

Patil

et al. 2018

Chemistry A European J

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Among many types of nanostructured inorganic materials, highly anisotropic 2D nanosheets provide unique advantages in designing and synthesizing efficient electrode and electrocatalyst materials for novel energy storage technologies. 2D inorganic nanosheets boast lots of unique characteristics such as high surface area, short ion diffusion path, tailorable compositions, and tunable electronic structures. These merits of 2D inorganic nanosheets render them promising candidate materials as electrodes for diverse secondary batteries and supercapacitors, and electrocatalysts. A wide spectrum of examples is presented for inorganic nanosheet-based electrodes and electrocatalysts. Future perspectives in research about 2D nanosheet-based functional materials are discussed to provide insight for the development of next-generation energy storage systems using 2D nanostructured materials.

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Synthesis of high quality two-dimensional materials via chemical vapor deposition

Abstract: The synthesis of high quality two-dimensional materials such as graphene, BN, and transition metal dichalcogenides by CVD provides a new opportunity for large scale applications.

Cited by 233 publications

References 90 publications

Influence of the substrate material on the optical properties of tungsten diselenide monolayers

Influence of the substrate material on the optical properties of tungsten diselenide monolayers

Few‐layer graphene coated on indium tin oxide electrodes prepared by chemical vapor deposition and their enhanced glucose electrooxidation activity

Recent Applications of 2D Inorganic Nanosheets for Emerging Energy Storage System

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