Products
Silver Colloids & Nanoparticles
PELCO® NanoXact™ and BioPure™
Silver Colloids & Nanoparticles
Citrate stabilized silver nanoparticles have a surface that is readily displaced by other biomolecules or polymers and is the capping agent of choice when using physisorption (noncovalent interactions such as van der Waals forces) to further modify the nanoparticle surface. Citrate capped colloidal silver particles are suspended in 2mM citrate buffer, pH 7.4.
NOTE: Thiols and amines have a high affinity for the silver surface. Functionalizing silver is difficult because thiols and amines bind strongly to the silver surface. However, the silver bonds are labile and can rearrange, reducing long term stability. To avoid destabilizing try to use bidentate or tridentate molecules (i.e. those that present multiple thiols or amines to the silver surface).
Nanoparticles Developed for Ted Pella, Inc.
The PELCO® NanoXact™ and BioPure™ colloidal silver nanoparticles are extensively characterized (see Technical Data below) and designed to meet the rigorous research demands in today’s market. They range in size from 20 to 100nm.
The silver colloids come with comprehensive specification sheets that provide all of the physical and optical characterization data necessary to integrate the nanoparticles into Surface Enhanced Raman Spectroscopy (SERS), plasmonic and photonic applications.
Product Description
- The colloids are negatively charged with a zeta potential of -25 to -60mV.
- The silver colloids are stable in the electron beam.
- NanoXact™ silver colloids are available in 100 and 500ml volumes – supplied in 2mM citrate buffer, pH 7.4.
- BioPure™ silver colloids are 50X more concentrated than the NanoXact™ silver colloids and available in 1 and 5ml volumes – supplied in 2mM citrate buffer, pH 7.4.
- Both silver lines have been extensively washed without centrifugation to remove trace elements from the supernatant (<0.000001% of trace elements).
Stability and Storage
The PELCO® NanoXact™ and BioPure™ silver colloids should be stored at 4°C in the dark. The silver colloids are photosensitive.
- DO NOT FREEZE.
- NanoXact™ line is stable for >6 months after purchase
- BioPure™ line is stable for >3 months after purchase
Product testing indicates increased stability can be attained by following the storage recommendations.
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1X Concentration
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NanoXact Ag Technical Data
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| Particle Diameter |
Ag Mass
Concentration |
Atomic Molarity
(Ag) |
Particle
Concentration |
Ag
Mass Percent |
Max
Optical Density |
Peak
Wave-length |
|
(mg/mL) 0.005
|
(mmol/L)
|
(particles/mL)
|
(%)
|
(cm-1)
|
nm
|
|
| 20 |
0.02
|
0.185
|
4.50 x 1011
|
0.002
|
2.46
|
405
|
| 30 |
0.02
|
0.185
|
1.30 x 1011
|
0.002
|
2.49
|
405
|
| 40 |
0.02
|
0.185
|
5.70 x 1010
|
0.002
|
2.54
|
410
|
| 50 |
0.02
|
0.185
|
2.90 x 1010
|
0.002
|
2.39
|
420
|
| 60 |
0.02
|
0.185
|
1.70 x 1010
|
0.002
|
2.03
|
435
|
| 70 |
0.02
|
0.185
|
1.10 x 1010
|
0.002
|
1.74
|
440
|
| 80 |
0.02
|
0.185
|
7.10 x 109
|
0.002
|
1.34
|
450
|
| 100 |
0.02
|
0.185
|
3.60 x 109
|
0.002
|
0.89
|
500
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Technical Note
 |
Download Technical Note |
| Art. | Description | Unit | Price | Quantity | |
|---|---|---|---|---|---|
| 84060-20 | 20nm PELCO NanoXact Silver Colloids/Nanoparticles – Supplied at 1X Concentration in 2mM citrate buffer, pH 7.4 |
100ml | € 202,10 | ||
| 84080-20 | 20nm PELCO NanoXact Silver Colloids/Nanoparticles – Supplied at 1X Concentration in 2mM citrate buffer, pH 7.4 |
500ml | € 727,30 | ||
| 84060-30 | 30nm PELCO NanoXact Silver Colloids/Nanoparticles – Supplied at 1X Concentration in 2mM citrate buffer, pH 7.4 |
100ml | € 202,10 | ||
| 84080-30 | 30nm PELCO NanoXact Silver Colloids/Nanoparticles – Supplied at 1X Concentration in 2mM citrate buffer, pH 7.4 |
500ml | € 727,30 | ||
| 84060-40 | 40nm PELCO NanoXact Silver Colloids/Nanoparticles – Supplied at 1X Concentration in 2mM citrate buffer, pH 7.4 |
100ml | € 202,10 | ||
| 84080-40 | 40nm PELCO NanoXact Silver Colloids/Nanoparticles – Supplied at 1X Concentration in 2mM citrate buffer, pH 7.4 |
500ml | € 727,30 | ||
| 84060-50 | 50nm PELCO NanoXact Silver Colloids/Nanoparticles – Supplied at 1X Concentration in 2mM citrate buffer, pH 7.4 |
100ml | € 202,10 | ||
| 84080-50 | 50nm PELCO NanoXact Silver Colloids/Nanoparticles – Supplied at 1X Concentration in 2mM citrate buffer, pH 7.4 |
500ml | € 727,30 | ||
| 84060-60 | 60nm PELCO NanoXact Silver Colloids/Nanoparticles – Supplied at 1X Concentration in 2mM citrate buffer, pH 7.4 |
100ml | € 202,10 | ||
| 84080-60 | 60nm PELCO NanoXact Silver Colloids/Nanoparticles – Supplied at 1X Concentration in 2mM citrate buffer, pH 7.4 |
500ml | € 727,30 | ||
| 84060-80 | 80nm PELCO NanoXact Silver Colloids/Nanoparticles – Supplied at 1X Concentration in 2mM citrate buffer, pH 7.4 |
100ml | € 202,10 | ||
| 84080-80 | 80nm PELCO NanoXact Silver Colloids/Nanoparticles – Supplied at 1X Concentration in 2mM citrate buffer, pH 7.4 |
500ml | € 727,30 | ||
| 84060-100 | 100nm PELCO NanoXact Silver Colloids/Nanoparticles – Supplied at 1X Concentration in 2mM citrate buffer, pH 7.4 |
100ml | € 202,10 | ||
| 84080-100 | 100nm PELCO NanoXact Silver Colloids/Nanoparticles – Supplied at 1X Concentration in 2mM citrate buffer, pH 7.4 |
500ml | € 775,70 |
