Magnetic particles for medical applications by glass crystallisation

Magnetic nanoparticles: Properties and potential applications

“…In solvent extraction, incorporation of extractants into magnetic liquids offers an advantageous alternative to conventional extractant solvents in that ease and speed of phase separation can be improved by up to 84 % without adversely affecting the percentage [Co(SCN) 4 (H 2 O) 2 ] 2-extraction. Coating of magnetite particles with a protective silica shell allows for Cu 2+ extraction under more acidic conditions which would otherwise be unsuitable for bare magnetite particles.…”

“…[Co(SCN) 4 (H 2 O) 2 ] 2-was extracted from an aqueous solution (15 ml, 17 mmol/l cobalt sulfate/potassium thiocyanate solution, 20 times molar excess KSCN in Milli-Q water, pH~6) using the combinations of extractant and carrier solvent (5 ml) as indicated in Table 1 by agitation (110 rpm) on a Labcon horizontal shaker (10 min). Triplicates were prepared for all extraction test samples.…”

“…The composition of the magnetic core is dependent on the application. For example, magnetite (Fe 3 O 4 ) and maghemite (γ-Fe 2 O 3 ) with high oxidative stability are currently the only accepted nontoxic magnetic materials for medical applications [4,5]. Magnetic cores consisting of materials such as cobalt, nickel, and neodymium-iron-boron may offer improved magnetic properties, however, these materials may be susceptible to oxidation or be toxic for use in the human body [6].…”

“…The pink color of this solution is as a result of the pink octahedral [Co(NCS) 4 (H 2 O) 2 ] 2-complex which is formed. Vogel reported the cobalt(II)-thiocyanate analytical test in which a bluish color is obtained upon the addition of acetone to an aqueous solution of cobalt thiocyanate.…”

Magnetic Nanoparticles: Properties and Potential Applications

“…The composition of the magnetic core is dependent on the application. For example, magnetite (Fe 3 O 4 ) and maghemite (γ-Fe 2 O 3 ) with high oxidative stability are currently the only accepted nontoxic magnetic materials for medical applications [4,5]. Magnetic cores consisting of materials such as cobalt, nickel, and neodymium-iron-boron may offer improved magnetic properties, however, these materials may be susceptible to oxidation or be toxic for use in the human body [6].…”