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).
一种制备磁性荧光纳米磁珠的方法,包括两亲性
聚合物外壳和具有磁性的磁芯;所述纳米磁珠包括具有超顺磁性能的磁芯,包括
铁磁性或
铁磁性纳米颗粒的集合体,包括以下步骤
a) 提供由
表面活性剂覆盖的胶体纳米颗粒,所述纳米颗粒的大小足以在室温(或纳米磁珠使用温度下)显示超顺磁性;
b) 向上述颗粒在溶剂中的溶液中加入两性
聚合物溶液,以获得上述超顺磁性纳米颗粒和
聚合物的混合物;
c) 向 b) 中得到的混合物中加入一种溶剂,其中所述纳米颗粒呈弧形不溶,而所用
聚合物仅部分可溶。