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    • 59. 发明申请
    • Silica Nanoparticles Doped with Dye Having Negative Charge and Preparing Method Thereof
    • 掺杂有负电荷的染料的二氧化硅纳米颗粒及其制备方法
    • US20120292572A1
    • 2012-11-22
    • US13574171
    • 2010-02-11
    • Wensheng YangJinglun LiangJun Li
    • Wensheng YangJinglun LiangJun Li
    • C09K11/06
    • C09C1/30B82Y30/00C01B33/18C01P2004/04C01P2004/34C01P2004/51C01P2004/52C01P2004/64C01P2004/84C09K11/02C09K11/06C09K2211/1096
    • Provided are silica nanoparticles doped with dyes having a negative charge by using cationic polyelectrolyte as templet and preparing method thereof. The nanoparticles have a core-shell structure, inner core comprises cationic polyelectrolyte aggregates, in which fluorescent dye having a negative charge and SiO2 are doped, and optional additive having a negative charge, the shell is consisted of SiO2, wherein the sum of negative charge carried by the additives and the fluorescent dye is less than that of positive charge carried by the polyelectrolyte aggregates. The preparing method comprises the following steps: preparing complex solution of polyelectrolyte and fluorescent dye; prehydrolysis of organosilicon source; coating with organosilicon source. The method can be applied to dope silica with various fluorescent dyes having a negative charge. Various dyes can be doped at the same time, the doping amount, and particle diameter and shape of the product can be controlled by the method. The nanoparticles are spherical, the particle diameter thereof is uniform, and colloid formed therefrom is stable.
    • 本发明提供了通过使用阳离子聚电解质作为电极的掺杂有负电荷的染料的二氧化硅纳米粒子及其制备方法。 纳米颗粒具有核 - 壳结构,内核包括阳离子聚电解质聚集体,其中掺杂有负电荷和SiO 2的荧光染料和具有负电荷的任选的添加剂,壳由SiO 2组成,其中负电荷之和 由添加剂和荧光染料负载的聚合电解质聚合物的负电荷小于正电荷。 制备方法包括以下步骤:制备聚电解质和荧光染料的复合溶液; 有机硅源的预水解; 涂有有机硅源。 该方法可用于将二氧化硅与具有负电荷的各种荧光染料掺杂。 可以同时掺杂各种染料,通过该方法可以控制产品的掺杂量,粒径和形状。 纳米颗粒是球形的,其粒径是均匀的,由其形成的胶体是稳定的。