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900708

Sigma-Aldrich

石墨烯量子点

blue luminescent, 1 mg/mL in H2O

别名:

GQD

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About This Item

CAS号:
7440-44-0
UNSPSC代码:
12352200

描述

topographic height: 1-2.0 nm

表单

suspension

浓度

1 mg/mL in H2O

颜色

colorless

直径

<5 nm

荧光

λex 350 nm; λem 445 nm FWHM 65 nm, quantum yield >65%

InChI

1S/C

InChI key

OKTJSMMVPCPJKN-UHFFFAOYSA-N

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一般描述

石墨烯量子点（GQDs）是横向尺寸小于100 nm的少层石墨烯片，具有强大的量子限制和边缘效应。因此，它们具有独特的物理性质，如强光致发光，可通过控制其尺寸、形状、缺陷和功能而针对特定应用进行定制。与经典的QD（如金属或硅量子点）相比，GQD具有生物相容性、光稳定性并且继承了石墨烯出色的热力性质、电性质和机械性能。这些特性极大促进了各种最先进的应用：
  • 荧光增白剂。
  • 安全应用的标志物。
  • 生物成像标记。
  • 荧光聚合物。
  • 抗菌、抗生物污染、消毒系统。
  • 重金属、湿度和压力传感器。
  • 电池。
  • 闪存设备。
  • 光电设备。
  • 发光二极管。

储存分类代码

12 - Non Combustible Liquids

WGK

nwg

闪点(°F)

Not applicable

闪点(°C)

Not applicable

历史批次信息供参考:

分析证书(COA)

Lot/Batch Number
MKCR2226
MKCQ2322
MKCN8390
MKCM2748
MKCK8189

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Cristina Stefanov et al.
Mikrochimica acta, 187(11), 611-611 (2020-10-17)
A gold nanoparticle/graphene quantum dots (AuNP/GQD) nanozyme-modified screen-printed carbon electrode (SPCE) was developed for fast and ultrasensitive determination of quercetin by square-wave voltammetry. The nanosensing device was inserted in miniaturized equipment. Under the optimal experimental conditions, a good linear relationship between
Jianhua Shen et al.
Chemical communications (Cambridge, England), 48(31), 3686-3699 (2012-03-14)
Similar to the popular older cousins, luminescent carbon dots (C-dots), graphene quantum dots or graphene quantum discs (GQDs) have generated enormous excitement because of their superiority in chemical inertness, biocompatibility and low toxicity. Besides, GQDs, consisting of a single atomic
An electrochemical avenue to green-luminescent graphene quantum dots as potential electron-acceptors for photovoltaics.
Yan Li et al.
Advanced materials (Deerfield Beach, Fla.), 23(6), 776-780 (2011-02-03)

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石墨烯量子点：属性、合成及应用

阐释了石墨烯量子点的属性、合成及应用。GQD具有无毒性、良好溶解性、稳定的光激发光以及更好的表面接枝属性等优势。

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Perovskite quantum dots research progresses overcoming challenges, enabling rapid development of light-emitting devices.

Questions

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  1. 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

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  2. 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

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