http://www.cd-bioparticles.com/p/Absolute-Mag-Carboxylic-Acid-Iron-Oxide-Nanoparticles-lyophilized-25-nm_20_193_211_4961.htmlAbsolute Mag Carboxylic Acid Iron Oxide Nanoparticles, which are coated with amphiphilic polymer in lyophilized powder form, are water-soluble iron oxide nanocrystals. The functional group on surface is carboxylic acid. Their zeta potential is from -30 mV to -50 mV. Their organic layers contain a monolayer of oleic acid and a monolayer of amphiphilic polymer, whose thickness is about 4 nm.
The hydrodynamic size of the nanocrystals is about 8-10 nm larger than their inorganic core size measured by TEM. Absolute Mag Carboxylic Acid Iron Oxide Nanoparticles can be reconstituted in DI water, DMSO, or DMF to any desired concentration less than 10 mg Fe/mL to meet do any conjugation, such as protein, peptide and other amine containing molecules, in the solvent system.