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Nanotechnology Overview
PELCO® NanoXact™ and BioPure™ Gold Colloids

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. Zeta potential of the NanoXact™ line is in the -50mV range. Zeta potential of the BioPure™ line is in the -30mV range.
  • The silver colloids are stable in the electron beam.
  • NanoXact™ silver colloids are available in 25, 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, 2 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. 


PELCO NanoXact and BioPure Silver Colloids/Nanoparticles

 

1X Concentration
   
50X Concentration
NanoXact™ Ag Technical Data
   
BioPure™ Ag Technical Data
Ag Mass
Concentration
Atomic
Molarity
(Ag)
Particle
Concentration
Ag
Mass
Percent
Max
Optical
Density
Peak
Wave-
length
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
   
(mg/mL)
±0.02
(mmol/L)
(particles/mL)
(%)
(cm-1)
nm
0.02
0.185
4.50 x 1011
0.002
2.46
405
20
1.0
9.25
2.25 x 1013
0.01
123
405
0.02
0.185
1.30 x 1011
0.002
2.49
405
30
1.0
9.25
6.50 x 1012
0.01
125
405
0.02
0.185
5.70 x 1010
0.002
2.54
410
40
1.0
9.25
2.85 x 1012
0.01
127
410
0.02
0.185
2.90 x 1010
0.002
2.39
420
50
1.0
9.25
1.45 x 1012
0.01
120
420
0.02
0.185
1.70 x 1010
0.002
2.03
435
60
1.0
9.25
8.50 x 1011
0.01
101
435
0.02
0.185
1.10 x 1010
0.002
1.74
440
70
1.0
9.25
5.50 x 1011
0.01
87
440
0.02
0.185
7.10 x 109
0.002
1.34
450
80
1.0
9.25
3.55 x 1011
0.01
67
450
0.02
0.185
3.60 x 109
0.002
0.89
500
100
1.0
9.25
1.80 x 1011
0.01
45
500

Technical Data Sheet for PELCO® NanoXact™ Silver Nanoparticles

Technical Data Sheet for PELCO® BioPure™ Silver Nanoparticles

PELCO® NanoXact™ Silver Colloids/Nanoparticles - Supplied at 1X Concentration in 2mM citrate buffer, pH 7.4

Citrate Capped Silver Colloids

MSDS (101KB PDF)

Size (nm) Particles/ml   25 ml Price 57.00/ea   100 ml Price 185.00/ea   500 ml Price 650.00/ea
20nm 4.50 x 1011   84050-20
Qty:
  84060-20
Qty:
  84080-20
Qty:
30nm 1.30 x 1011   84050-30
Qty:
  84060-30
Qty:
  84080-30
Qty:
40nm 5.70 x 1010   84050-40
Qty:
  84060-40
Qty:
  84080-40
Qty:
50nm 2.90 x 1010   84050-50
Qty:
  84060-50
Qty:
  84080-50
Qty:
60nm 1.70 x 1010   84050-60
Qty:
  84060-60
Qty:
  84080-60
Qty:
70nm 1.10 x 1010   84050-70
Qty:
  84060-70
Qty:
  84080-70
Qty:
80nm 7.10 x 109   84050-80
Qty:
  84060-80
Qty:
  84080-80
Qty:
100nm 3.60 x 109   84050-100
Qty:
  84060-100
Qty:
  84080-100
Qty:



PELCO® BioPure™ Silver Colloids/Nanoparticles - Supplied at 50X Concentration in 2mM citrate buffer, pH 7.4

Citrate Capped Silver Colloids

MSDS (101KB PDF)

Size (nm) Particles/ml   1 ml Price 250.00/ea   5 ml Price 1050.00/ea
20nm 4.50 x 1011   85010-20
Qty:
  85030-20
Qty:
30nm 1.30 x 1011   85010-30
Qty:
  85030-30
Qty:
40nm 5.70 x 1010   85010-40
Qty:
  85030-40
Qty:
50nm 2.90 x 1010   85010-50
Qty:
  85030-50
Qty:
60nm 1.70 x 1010   85010-60
Qty:
  85030-60
Qty:
70nm 1.10 x 1010   85010-70
Qty:
  85030-70
Qty:
80nm 1.70 x 109   85010-80
Qty:
  85030-80
Qty:
100nm 3.60 x 109   85010-100
Qty:
  85030-100
Qty: