Colloidal Magnetic Silica Nano-/Microspheres
 

  • CV< 10 % for Nanospheres below 1 μm and CV< 5% for Microspheres above 1 μm

  • Roundness > 0.980, Density: ~2.5 g/cm^3

  • Sodium azide can be added as an antimicrobial agent upon request.

  • Saturation magnetization: ~20 emu/g

  • Provided in Milli-Q water

  • Superparamagnetic cores covered by the silica shells

  • Silica shell is optional if the superparamagnetic iron oxide core is needed

  • Surface functional group: -OH available for all sizes and -NH2 and -COOH available for 100 nm, 300 nm, and 1 μm

  • Low concentrations to ultra-high concentration available: 10 - 100 mg/ml (i.e. 1 - 10 % w/v)

  • Sizes available: 100 nm, 300 nm, 500 nm, 1 μm, 2 μm, 5 μm, 10 μm, and 50 μm

  • Although applications vary from one to another, 1-10 mg solid magnetic silica microspheres will typically yield 10 μg of DNA molecules 

  • Lifetime: At least 2 years from the date of product delivery

  • These iron oxide beads coated with silica can be easily surface functionalized via chemical bond formation. The non-functionalized magnetic silica nanoparticles (1 μm being the most popular size) are frequently used for plasmid DNA/RNA isolation/extraction. Carboxyl-functionalized magnetic silica nanoparticles and amine-terminated magnetic silica beads are known to be effective in protein isolation or macromolecule purification.

  • Can be adapted to other common biological buffers like phosphate-buffered saline (PBS) or organic solvents like ethanol via repeated centrifugation and resuspension.

  • The magnetic silica microspheres might precipitate at the bottom of the containing vial over time, and this is not a sign of aggregation. Large particles precipitate faster than small particles. These particles can be easily resuspended using sonication (ultrasonic bath or ultrasonic homogenizer) or vortexing.

  • Our magnetic silica beads are only priced based on the solid content; for instance, 50 ml of the silica nanospheres at 10mg/ml would have the same price as 10 ml of the silica nanospheres at 50 mg/ml.

Safety Data Sheets

Magnetic Responsiveness​

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Fully suspended microspheres when they are away from the magnetic field

Aggregated microspheres at the poles when they are in the magnetic field

Alpha Nanotech Silica Magnetic Beads

Our colloidal magnetic silica beads & microspheres respond to the magnetic field, enabling many laboratory and commercial applications. These microspheres can be repetitively used and easily coupled with other surface moieties for further functionalizations. 

Scanning/Transmission Electron Micrographs

100 nm

Alpha Nanotech Magnetic Silica Nanoparticles
Alpha Nanotech Magnetic Silica Nanoparticles

300 nm

Alpha Nanotech Magnetic Silica Nanoparticles
Alpha Nanotech Magnetic Silica Nanoparticles

1 μm

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2 μm

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5 μm

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10 μm

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50 μm

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Zeta Potential Measurements at pH 7 for Hydroxyl-, Carboxyl-, and Amine-Terminated Magnetic Silica Beads & Microspheres

Hydroxyl-Terminated Magnetic Silica Microspheres

Carboxyl-Terminated Magnetic Silica Microspheres

Amine-Terminated Magnetic Silica Microspheres

 Zeta Potential Measurements at Different pH for Hydroxyl-Terminated Magnetic Silica Beads & Microspheres

Alpha Nanotech Magnetic Silica Beads

Fourier-transform infrared spectroscopy (FTIR) measurement results

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Our Colloidal Magnetic Silica Nano-/Microspheres in Stock:

100 nm, Hydroxyl-Terminated

 

100 nm, Carboxyl-Terminated

100 nm, Amine-Terminated

300 nm, Hydroxyl-Terminated

 

300 nm, Carboxyl-Terminated

 

300 nm, Amine-Terminated
 

1 μm, Hydroxyl-Terminated

1 μm, Carboxyl-Terminated

1 μm, Amine-Terminated

μm, Hydroxyl-Terminated

μm, Hydroxyl-Terminated

10 μm, Hydroxyl-Terminated

50 μm, Hydroxyl-Terminated

10 ml at 10 mg/ml

$ 180

$ 180

$ 180

$ 180

$ 180

$ 180

$ 180

 

$ 180

$ 180

$ 180

$ 180

$ 180

$ 180

20 ml at 10 mg/ml

$ 290

$ 290

$ 290

$ 290

$ 290

$ 290

 

$ 290

$ 290

$ 290

$ 290

$ 290

$ 290

$ 290

10 ml at 50 mg/ml

$ 550

$ 550

 

$ 550

 

$ 550

 

$ 550

 

$ 550

$ 550

$ 550

$ 550

$ 550

$ 550

$ 550

$ 550

20 ml at 50 mg/ml

$ 890

$ 890

$ 890

$ 890

$ 890

$ 890

 

$ 890

 

$ 890

 

$ 890

$ 890

$ 890

$ 890

$ 890

Daily Exchange Rates
(updated every 12 hr)

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Notes:
 

1. SDS (Material Safety Data Sheet) and COA (Certificate of Analysis) are included in every purchase. 

2. The prices listed above are in Canadian Dollars (CND$), and please refer to the above exchange box for the most current daily exchange rates.

3. We accept both online purchases at our online store or Amazon stores and invoiced orders (Net 30 Terms). In-stock items will be dispatched within 1-2 business days. The lead time for customized orders is typically within 10 business days and will be evaluated on a case-by-case basis.

 

4. Shipping Locations for our clients are listed below.
 

Orders destined for the United States will be shipped from one of the two US offices below.

Unit 390, 701 Harrison Ave, Blaine, WA 98230 US

Unit 4, 2045 Niagara Falls Blvd, Niagara Falls, NY 14304 US
 

Orders destined for the UK will be shipped from our UK office.

Office 24743, Courier Point, 13 Freeland Park, Wareham Road, Poole, Dorset, BH16 6FH, UK


Orders destined for Europe will be shipped from our EU office.
Allée Primavera 78, Annecy, Pringy, 74370, France


Orders destined for Canada and other International destinations will be shipped from our Canadian headquarters.
135 - 3800 Wesbrook Mall, University of British Columbia Campus, Vancouver, BC, V6S2L9, Canada


No duties or any additional taxes for the orders delivered to Canadian, US, UK, and EU addresses, regardless of the sales channel. For other International shipping addresses, recipients are responsible for local duties and taxes.

 

5. Free exchanges or full refunds will be offered within 30 days after the order fulfillment without any questions asked if the ordered items fail to meet customer expectations.