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900560

Sigma-Aldrich

石墨烯量子点

>0.005% in H2O

同義詞:

GQDs

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About This Item

CAS號碼:
7440-44-0
MDL號碼:
MFCD00133992
分類程式碼代碼:
11101522
NACRES:
NA.23
暫時無法取得訂價和供貨情況

形狀

liquid

品質等級

100

濃度

>0.005% in H2O

螢光

, quantum yield >50%

SMILES 字串

[C]

InChI

1S/C

InChI 密鑰

OKTJSMMVPCPJKN-UHFFFAOYSA-N

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相關類別

一般說明

石墨烯量子点（GQD）的下一代电子和能源领域的应用很有潜力。石墨烯本身不具有带隙能，其使用也受到限制。 但是，当它们的大小变得像量子点一样小时，它们会在紫外、可见和近红外范围内显示出光致发光。石墨烯量子点的尺寸范围约为 1-4nm。由于其量子限制效应，GQD 可以应用于光伏设备，例如太阳能电池、生物成像（癌细胞成像、蛋白质分析、细胞跟踪），各种类型的传感器等。

應用

  • 生物成像。
  • 光催化。
  • LED。
  • 能量转换。
  • 传感。

儲存類別代碼

10 - Combustible liquids

水污染物質分類（WGK）

nwg

從最近期的版本中選擇一個：

分析證明 (COA)

Lot/Batch Number
MKCV7272
MKCW3364
MKCR6753
MKCP4929
MKCD1038

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文章

Graphene Quantum Dots: Properties, Synthesis & Applications

Properties, synthesis & applications of Graphene Quantum Dots explained. GQDs have advantages of nontoxicity, good solubility, stable photoluminescence & better surface grafting.

石墨烯量子點：特性、合成與應用

石墨烯量子點的特性、合成與應用說明。GQDs 具有無毒、溶解性佳、光發光穩定及表面接枝性佳等優點。

Synthesis and Applications of Graphene Nanoribbons Synthesized

Graphene nanoribbons (GNRs) are quasi-one-dimensional narrow strips of graphene comprised of sp2-hybridized carbon atoms arranged into hexagonal honeycomb lattice configurations.

Questions

1–6 of 6 Questions  

  1. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer

    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

      Helpful?

  2. How can I determine the shelf life / expiration / retest date of this product?

    1 answer

    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

      Helpful?

  3. Could you clarify the concentration of >0.005% in H2O part. Does that mean >50ppm? What is the concentration in ppm (and FWHM, ex/em)?

    1 answer

    1. Yes, the 0.005% is equivalent to 50 ppm. The exact concentration in wt% is tested on a lot-to-lot basis and published in the Certificate of Analysis. The value can be converted to ppm using equation as wt% x 1,000,000 = ppm. Unfortunately, the FWHM and λex/λem is not determined.

      Helpful?

  4. 900560: Liquid GQDs with a concentration of greater than 0.005% in H2O and a quantum yield of more than 50%. What is the concentration of the stock solution?

    1 answer

    1. The concentration of this product varies from lot to lot and is reported in the product Certificate of Analysis as 'Residue on Evaporation. A survey of recent batches indicates a general range of 0.12 - 0.22%. Please see the link below to review a sample or lot specific Certificate:
      https://www.sigmaaldrich.com/product/aldrich/900560#product-documentation

      Helpful?

  5. Is the fluorescence of this product the same as that of another product 900708? λex 350 nm; λem 445 nm FWHM 65 nm, quantum yield >65%

    1 answer

    1. The Graphene QD product 900708, λex 350 nm; λem 445 nm Full Width Half Max (FWHM) 65 nm, does not offer a single excitation or emission to use for this product. This QD exhibits strong emission light when 400 nm - 460 nm light is illuminated, primarily at 400 nm. The 900560, Graphene QD solution, >0.005% in H2O, again, does not have a specified single excitation or emission value. Emission varies by wavelength as demonstrated in the image below:

      Helpful?

  6. 이 제품의 발광 색이 무엇입니까? 초록색입니까?파란색입니까?

    1 answer

    1. These quantum dots are blue from UV to the visible light range.

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