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741949

Sigma-Aldrich

Gold nanoparticles

5 nm diameter, OD 1, stabilized suspension in citrate buffer

Synonym(e):

Au NP, Gold Colloid

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25 ML
CHF 136.00
100 ML
CHF 435.00

CHF 136.00


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25 ML
CHF 136.00
100 ML
CHF 435.00

About This Item

MDL-Nummer:
UNSPSC-Code:
12352302
PubChem Substanz-ID:
NACRES:
NA.23

CHF 136.00


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Qualitätsniveau

Form

nanoparticles
suspension

Enthält

stabilizer (Proprietary Surfactant)

Konzentration

~5.5E+13 particles/mL

OD

1

Durchmesser

5 nm

λmax

510-521 nm

PDI

<0.2

Lagertemp.

2-8°C

SMILES String

[Au]

InChI

1S/Au

InChIKey

PCHJSUWPFVWCPO-UHFFFAOYSA-N

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Allgemeine Beschreibung

Gold nanoparticles (AuNPs) are colloidal nanoparticles with multiple surface functionalities that can be used in the development of new biomaterials. AuNP has a spherical structure with a large surface to volume ratio and excellent biocompatibility. It is majorly used in a variety of biomedical applications ranging from diagnostics to drug delivery.[1][2]

Anwendung

Ideal for adsorption of thiolated ligands such as oligonucleotides and polyethylene glycols. Also, due to the increased stability, these gold nanoparticles are ideal for use in physical and optical applications. Note: This product is not ideal for protein adsorption. For gold nanoparticles suitable for adsorption of proteins and other ligands for conjugate development, please see our gold nanoparticles stabilized in PBS.

This material is highly monodisperse (<12% variability in size and shape), and provides significantly improved surface reactivity. Applications include Surface Enhanced Raman Lables, Sensing/Detection, Biological Targeting, Plasmonics and Electronics.

Rechtliche Hinweise

Product of CytoDiagnostics, Inc.

Lagerklassenschlüssel

12 - Non Combustible Liquids

WGK

nwg

Flammpunkt (°F)

Not applicable

Flammpunkt (°C)

Not applicable


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Kunden haben sich ebenfalls angesehen

Gold nanoparticles: synthesis and applications in drug delivery
Khan AK, et al.
Tropical Journal of Pharmaceutical Research, 13(7), 1169-1177 (2014)
Gold nanoparticles: preparation, properties, and applications in bionanotechnology
Yeh Y, et al.
Nanoscale, 4(6), 1871-1880 (2012)

Artikel

Steven J. Oldenburg, Ph.D. provides an overview of lateral flow diagnostic assays and discusses the use of ultra-bright reporter particles based on the unique optical properties of gold nanoshells that significantly increase the sensitivity of lateral flow immunoassays.

Sustainable energy sources with high production efficiency are crucial for meeting increasing energy demand.

Gold (Au) nanoparticles have tunable optical and electronic properties and are used in a number of applications including photovoltaics, sensors, drug delivery & catalysis.

Professors summarize recent 2D materials synthesis advancements and biosensing applications in various fields.

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Questions

1–10 of 15 Questions  
  1. What is the molar concentration of gold nanoparticles?

    1 answer
    1. These Gold Nanoparticles are prepared at a concentration of 9.08 × 10⁻⁸ M or 90.8 nM. Please refer to the image below for additional parameter:

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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

      Helpful?

  3. 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?

  4. What is extinction coefficient of this gold nano particle?

    1 answer
    1. The Molar Extinction Coefficient for this product is reported to be 1.10E+07 (M-1cm-1).

      Helpful?

  5. Do I need to wash my gold nanoparticles?

    1 answer
    1. For most applications, our gold nanoparticles can be used without any additional washing steps. If you have a sensitive application that requires additional washing the best way to do so is by either centrifugation or filtration.

      Helpful?

  6. What is the shape of the gold nanoparticles?

    1 answer
    1. The majority (>95%) of the gold nanoparticles are spherical.

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  7. My gold nanoparticles settle out of solution upon storage. Is this normal?

    1 answer
    1. Settling of gold nanoparticles on the bottom of the storage flask is completely normal and is especially common for larger sized particles, which settles at greater speed. Settling does not affect the performance of the particles. Prior to use, simply swirl the solution to properly disperse your gold nanoparticles and obtain a homogenous solution.

      Helpful?

  8. How do you attach gold nanoparticles to oligos?

    1 answer
    1. To attach gold nanoparticles to oligos please view the information in the attached reference - Bioconjug Chem. 2011 Apr 20;22(4):794-807. Epub 2011 Mar 28.

      Helpful?

  9. Can the Gold nanoparticles be frozen?

    1 answer
    1. No, the Gold nanoparticles should not be frozen.  If frozen, the gold nanoparticles will irreversibly aggregate, turning the solution clear.

      Helpful?

  10. How does the storage temperature relate to shipping conditions?

    1 answer
    1. The storage conditions that a Sigma-Aldrich catalog and label recommend for products are deliberately conservative. For many products, long-term storage at low temperatures will increase the time during which they are expected to remain in specification and therefore are labeled accordingly. Where short-term storage, shipping time frame, or exposure to conditions other than those recommended for long-term storage will not affect product quality, Sigma-Aldrich will ship at ambient temperature. The products sensitive to short-term exposure to conditions other than their recommended long-term storage are shipped on wet or dry ice. Ambient temperature shipping helps to control shipping costs for our customers. At any time, our customers can request wet- or dry-ice shipment, but the special handling is at customer expense if our product history indicates that the product is stable for regular shipment.

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1–10 of 15 Questions  

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