| 摘要 |
<p>A method for the preparation of magnetic fluorescent nanobeads, comprising and an amphiphilic polymer shell and a core having magnetic properties; said nanobeads comprise a core having superparamagnetic behaviour, including an aggregate of ferromagnetic or ferromagnetic nanoparticles and comprising the steps of:
a) providing colloidal nanoparticles, covered by a surfactant, said nanoparticles having such size as to show superparamagnetic properties at room-temperature (or anyhow at the temperature of nanobeads use);
b) adding a solution of amphiphylic polymer to a solution of said particles in a solvent to obtain a mixture of said superparamagnetic nanoparticles and polymer;
c) adding a solvent wherein said nanoparticles arc insoluble and the used polymer is only partially soluble to the mixture obtained in b).</p> |
