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Magnetic Fe2O3@SiO2 powder, Size: 250 nm, Core size: 45 nm, Shell size: 205 nm, Negatively-charged
€339.00 – €1,395.00
Description
Fe2O3@SiO2, Size: 250 nm, Core size: 45 nm, Shell size: 205 nm, Negatively-charged
Among various iron oxide phases, γ-Fe2O3 (Maghemite), α-Fe2O3 (Hematite) and Fe3O4 (Magnetite) are well-known nano-crystalline structures due to their magnetic properties, nontoxicity and chemical stability. These nanostructures have gained much interest in a broad range of disciplines such as magnetic recording systems (data storage), magnetic refrigeration, magneto-optical devices, magnetic resonance imaging, separation techniques and purification of biological molecules.
However, for specific applications, the bare magnetic nanoparticles need to be coated with a suitable material to improve their stability and biocompatibility due to the fact that the neat iron oxide nanoparticles possess relatively low colloidal stability and high nonspecific bindings. In contrast, SiO2-coated magnetic nanoparticles are hydrophilic and stable against biodegradation. Moreover, the other unique advantages such as easy surface modification/functionalization (due to the presence of reactive surface silanol groups) and possibility of recovery from the reaction mixture are of great interest for exploring the applicability of SiO2-coated magnetic nanoparticles in a broad range of applications.
Recently, silica-coated magnetic nanoparticles (γ-Fe2O3 and α-Fe2O3) have attracted much attention in biomedical applications including magnetic resonance imaging, magneto-relaxometry, magnetic cell separation and drug delivery. Their morphologies and well-controlled particle size would be important for employing these nanomaterials in biomedicine and biotechnology. More importantly, SiO2-coated Fe2O3 nanostructures are extensively used as sorbent for a wide variety of reactions because of their superior physicochemical properties. Also due to the promising catalytic specification and high surface area-to-volume ratio, these nanostructures are excellent supports for the immobilization of homogeneous catalysts such as metal complexes.
Technical Properties:
| SIZE |
250 nm |
| Fe2O3 CAS |
1309-37-1 |
| SiO2 CAS |
7631-86-9 |
| Core Size Range |
45 nm |
| Shell Size | 205 nm |
| Charge |
Negative |
Additional information
| Quantity | 1 g, 5 g |
|---|
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