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/418/501/product-dating-information-06-25-mk.pdf
741949
金ナノ粒子
5 nm diameter, OD 1, suspension in citrate buffer
別名:
Au NP, 金コロイド
サイズを選択してください
| あなたへ/カタログ番号 | 在庫状況 | 単価 |
|---|---|---|
25 mL | 在庫fromsìså¬368 | ￥18,400 |
100 mL | 在庫fromsìså¬368 | ￥56,400 |
この商品について
Quality Segment
form
nanoparticles, suspension
concentration
~5.5E+13 particles/mL
OD
1
diameter
5 nm
λmax
510-521 nm
PDI
<0.2
storage temp.
2-8°C
SMILES string
[Au]
InChI
1S/Au
InChI key
PCHJSUWPFVWCPO-UHFFFAOYSA-N
General description
Application
この材料は極めて高い単分散性(サイズと形状の変動係数：<12%)を示し、表面の反応性が大幅に向上しています。その応用例は、表面増強型ラマン散乱ナノプローブ、センサ/検出、生物学的ターゲティング、プラズモンナノ構造、およびナノスケールパターニングなどがあります。
Legal Information
1 of 1
当該品目 | |||
|---|---|---|---|
| form nanoparticles, suspension | form nanoparticles, suspension | form nanoparticles, suspension | form nanoparticles, suspension |
| storage temp. 2-8°C | storage temp. 2-8°C | storage temp. 2-8°C | storage temp. 2-8°C |
| OD 1 | OD 1 | OD 1 | OD 1 |
| diameter 5 nm | diameter 100 nm | diameter 10 nm | diameter 20 nm |
| concentration ~5.5E+13 particles/mL | concentration ~3.8E+9 particles/mL | concentration ~6.0E+12 particles/mL | concentration ~6.54E+11 particles/mL |
| PDI <0.2 | PDI <0.2 | PDI <0.2 | PDI <0.2 |
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保管分類
12 - Non Combustible Liquids
flash_point_f
Not applicable
flash_point_c
Not applicable
wgk
WGK 2
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How can I determine the shelf life / expiration / retest date of this product?
1 回答-
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Are these gold nanoparticles coated in a different material to stop them sticking together?
1 回答-
The 5nm Stabilized Gold Nanoparticles are provided in a 0.1 mg/ml citrate solution supplemented with a proprietary stabilizing surfactant to prevent aggregation.
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What is the approximate concentration (in g/L) of this suspension?
1 回答-
These Gold Nanoparticles are prepared at a concentration of 9.08 × 10⁻⁸ M or 90.8 nM. Based on the molecular weigh of 196.97 g/mol of gold, this equates to 0.0179 ug/mL
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What is the molar concentration of gold nanoparticles?
1 回答-
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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How is shipping temperature determined? And how is it related to the product storage temperature?
1 回答-
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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What is extinction coefficient of this gold nano particle?
1 回答-
The Molar Extinction Coefficient for this product is reported to be 1.10E+07 (M-1cm-1).
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My gold nanoparticles settle out of solution upon storage. Is this normal?
1 回答-
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.
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Which gold nanoparticle size should I choose for my application?
1 回答-
The size of gold nanoparticle to use is very depandent upon the intended application. Generally, smaller particles offer better sensitivity in applications such as immunogold labeling due to less steric hindrance and the ability to bind more gold nanoparticles to the desired target. Small gold nanoparticles are less visible than larger particles, however, which must also be taken into account.As an application example, particles with a size between 30-50nm are particularly useful for the development of rapid tests such as lateral flow assays.
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What is the shape of the gold nanoparticles?
1 回答-
The majority (>95%) of the gold nanoparticles are spherical.
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Why does my gold nanoparticle solution turn violet when I add salt containing buffer?
1 回答-
Due to repulsive forces arising from the surface charge of gold nanoparticles, an energy barrier must be overcome for individual particles to interact. When no (or small) amounts of electrolytes such as NaCl is present, this energy barrier is too strong for interaction to occur between particles. However, upon addition of NaCl this energy barrier is reduced allowing the gold nanoparticles to interact and aggregate. This aggregation causes a phenomenon called surface-plasmon coupling which changes the adsorption maximum of light to a higher wavelength resulting in a change in color of the solution.
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