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      基于藍(lán)寶石襯底的三角形單層二硫化鎢

      簡要描述:Isolated monolayer thickness WS2 are grown onto c-cut (0001) sapphire substrates.

      • 產(chǎn)品型號:
      • 廠商性質(zhì):生產(chǎn)廠家
      • 更新時間:2025-05-08
      • 訪  問  量:1357

      詳細(xì)介紹

      Isolated monolayer thickness WS2 are grown onto c-cut (0001) sapphire substrates. This particular product contains monolayer thickness WS2 triangular flakes randomly distributed across sapphire substrate. While some regions reach continuity with coalesced WS2 triangles, this sample contains well-separated triangles for advanced spectroscopy, microscopy, and electronic measurements. Synthesized monolayer WS2 triangles are highly luminescent and Raman spectroscopy studies also confirm the monolayer thickness.

       

      Sample Properties.

      Sample size

      1cm x 1cm square shaped

      Substrate type

      (0001) c-cut sapphire

      Coverage

      Isolated and partially merged monolayer triangl

      Electrical properties

      2.0 eV Direct Bandgap Semiconductor

      Crystal structure

      Hexagonal Phase

      Unit cell parameters

      a = b = 0.312 nm, c = 1.230 nm, α = β = 90, γ = 120°

      Production method

      Low pressure Chemical Vapor Deposition (LPCVD)

      Characterization methods

      Raman, photoluminescence, TEM, EDS

      Specifications

      1)     Well-separated WS2 domains across c-cut sapphire

      2)     One centimeter in size. Larger sizes up to 2-inch wafer-scale available upon requests.

      3)     Atomically smooth surface with roughness < 0.2 nm.

      4)     Highly uniform surface morphology. WS2 triangles are scattered across sample.

      5)     99.9995% purity as determined by nano-SIMS measurements

      6)    Repeatable Raman and photoluminescence response

      7)     High crystalline quality, Raman response, and photoluminescence emission comparable to single crystalline monolayer flakes.

      8)     c-cut Sapphire but our research and development team can transfer WS2 triangles onto variety of substrates including PET, quartz, and SiO2/Si without significant compromising of material quality.

      9)    WS2 monolayer triangles do not contain intentional dopants or defects. However, our technical staff can produce defected WS2 using α-bombardment technique.

       

      Supporting datasets [for 100% Full area coverage on SiO2/Si]

       

      Transmission electron images (TEM) acquired from CVD grown WS2 (triangular) monolayers on c-cut sapphire confirming highly crystalline nature of monolayers

      Energy dispersive X-ray spectroscopy (EDX) characterization on CVD grown full area coverage WS2 on sapphire confirming W:S 1:2 ratios

      Room temperature photoluminescence spectroscopy (PL) and Raman spectroscopy (Raman) measurements performed on CVD grown full area coverage MoS2 monolayers on c-cut sapphire. Raman spectroscopy measurement confirm monolayer nature of the CVD grown samples and PL spectrum display sharp and bright PL peak located at 1.85 eV in agreement with the literature.

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      上海巨納科技有限公司 公司地址:上海市虹口區(qū)寶山路778號海倫國際大廈5樓   技術(shù)支持:化工儀器網(wǎng)
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