Magnetic Nanoparticles and Uses Thereof
    8.
    发明申请
    Magnetic Nanoparticles and Uses Thereof 审中-公开
    磁性纳米粒子及其用途

    公开(公告)号:US20130089614A1

    公开(公告)日:2013-04-11

    申请号:US13704336

    申请日:2011-06-13

    IPC分类号: A61K9/14

    摘要: Magnetic nanoparticles are provided that have a superparamagnetic core and a nanoporous silica shell surrounding the core. The shell is functionalized with amine or S-nitrosothiol groups both inside and outside the nanopores. A process to provide such nanoparticles involves hydrolyzing tetraethoxysilane (TEOS) in a microemulsion of a superparamagnetic nanoparticle to form a superparamagnetic nanoparticle encapsulated by an incompletely hydrolyzed nanoporous silica shell, and hydrolyzing an amine-containing compound or a thiol-containing compound in situ in the presence of the incompletely hydrolyzed nanoporous silica shell before hydrolysis and densification of the silica shell is complete to functionalize the nanoporous silica shell with amine or thiol groups both inside and outside the nanopores and to maintain nanoporosity of the shell. Such magnetic nanoparticles are useful as carriers for chemical or biological species, particularly for magnetic resonance imaging, optical imaging, targeted drug delivery, cell delivery and magnetic separation applications.

    摘要翻译: 提供磁性纳米颗粒,其具有超顺磁核和围绕芯的纳米多孔二氧化硅壳。 壳体在纳米孔内部和外部用胺或S-亚硝基硫醇基官能化。 提供这种纳米颗粒的方法包括在超顺磁性纳米颗粒的微乳液中水解四乙氧基硅烷(TEOS)以形成由不完全水解的纳米多孔二氧化硅壳包封的超顺磁性纳米颗粒,并在原位上水解含胺化合物或含硫醇的化合物 在二氧化硅壳水解和致密化之前,不完全水解的纳米多孔二氧化硅壳体的存在已完成,使纳米多孔二氧化硅壳体与纳米孔内部和外部的胺或硫醇基团官能化并保持壳体的纳米孔隙度。 这种磁性纳米颗粒可用作化学或生物物质的载体,特别是用于磁共振成像,光学成像,靶向药物递送,细胞递送和磁分离应用。