Direct coprecipitation route to monodisperse dual-functionalized magnetic iron oxide nanocrystals without size selection.
Water-soluble monodisperse superparamagnetic Fe3O4 nanocrystals decorated with two distinct functional groups are prepared in a single-step procedure by injecting iron precursors into a refluxing aqueous solution of a polymer ligand, trithiol-terminated poly(methacrylic acid) (PMAA-PTTM), bearing both carboxylate and thiol functionalities. The ratio of carboxylic acid groups in the polymer-protecting ligand to the iron precursors plays a key role in determining the particle size and particle size distribution. The surface functionalities of the ligands allow post-synthesis modification of the materials to produce water-soluble fluorescent magnetic nanocrystals.
Li
Zhen
Z
Department of Chemistry, University of Liverpool, L69 7ZD, UK.
Tan
Bien
B
Allix
Mathieu
M
Cooper
Andrew I
AI
Rosseinsky
Matthew J
MJ
D011232:Chemical Precipitation; D018360:Crystallography, X-Ray; D052203:Ferrosoferric Oxide / Q000737:chemistry*; D008024:Ligands; D053768:Metal Nanoparticles / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission; D036103:Nanotechnology; D010316:Particle Size; D011109:Polymethacrylic Acids / Q000737:chemistry; D012995:Solubility; D013059:Spectrum Analysis, Raman; D013438:Sulfhydryl Compounds / Q000737:chemistry; D013816:Thermodynamics; D014867:Water
D008024:Ligands; D011109:Polymethacrylic Acids; D013438:Sulfhydryl Compounds; D014867:Water; C030613:polymethacrylic acid; D052203:Ferrosoferric Oxide