跳转至内容
Merck
所有图片(1)

主要文件

900560

Sigma-Aldrich

石墨烯量子点

>0.005% in H2O

别名:

GQDs

登录查看公司和协议定价

选择尺寸

10 ML
$332.00

$332.00

请联系客服了解存货情况
获取大包装报价
所有图片(1)

选择尺寸

变更视图
10 ML
$332.00

About This Item

CAS号:
7440-44-0
MDL编号:
MFCD00133992
UNSPSC代码:
11101522
NACRES:
NA.23

$332.00

请联系客服了解存货情况
获取大包装报价

表单

liquid

质量水平

100

浓度

>0.005% in H2O

荧光

, quantum yield >50%

SMILES字符串

[C]

InChI

1S/C

InChI key

OKTJSMMVPCPJKN-UHFFFAOYSA-N

正在寻找类似产品? 访问 产品对比指南

相关类别

一般描述

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。

应用

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

储存分类代码

10 - Combustible liquids

WGK

nwg

历史批次信息供参考:

分析证书(COA)

Lot/Batch Number
MKCV7272
MKCW3364
MKCR6753
MKCP4929
MKCD1038

没有发现合适的版本？

如果您需要特殊版本，可通过批号或批次号查找具体证书。

搜索COA

已有该产品？

在文件库中查找您最近购买产品的文档。

访问文档库

商品

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。

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.

      Helpful?

Reviews

No rating value

Active Filters

我们的科学家团队拥有各种研究领域经验，包括生命科学、材料科学、化学合成、色谱、分析及许多其他领域.

联系客户支持