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    • 5. 发明申请
    • SYNTHESIS OF NANOASSEMBLIES CONTAINING LUMINESCENT QUANTUM DOTS AND MAGNETIC NANOPARTICLES
    • 含有发光量子点和磁性纳米粒子的纳米粒子的合成
    • US20100112716A1
    • 2010-05-06
    • US11088242
    • 2005-03-23
    • Zeev RosenzweigYongfen ChenDesheng Wang
    • Zeev RosenzweigYongfen ChenDesheng Wang
    • G01N21/76G01N33/68G01N33/574
    • G01N21/6489B82Y15/00B82Y30/00G01N21/6428G01N33/533G01N33/57415G01N33/588Y10S977/773Y10S977/783Y10S977/824Y10S977/83Y10S977/834Y10S977/838Y10T428/2982Y10T428/2991Y10T428/2998
    • Negatively charged luminescent CdSe—ZnS quantum dots (QDs) were successfully incorporated into novel luminescent glyconanospheres averaging around 190 nm in diameter through electrostatic interactions with carboxymethyldextran (CM-dextran) and polylysine. The glyconanospheres preferably contain as well carboxyl-modified iron oxide nanocrystals. In addition to electrostatic attraction between the negatively charged dextran, the negatively charged CdSe—ZnS QDs (and negatively charged iron oxide nanocrystals, if present), and the positively charged polylysine, covalent amide bonds were introduced to cross link the QDs (and negatively charged iron oxide nanocrystals, if present) with the polysaccharide matrix to further stabilize the glyconanospheres. The dextran residues on the surface of the nanospheres show high affinity toward the glucose binding protein-Concanavalin A (Con A). As a result, these luminescent CdSe—ZnS QD incorporated glyconanospheres are a useful tool for studying carbohydrate-protein interactions that are critical steps in bacterial and viral infection.
    • 通过与羧甲基葡聚糖(CM-葡聚糖)和聚赖氨酸的静电相互作用,将带负电的发光CdSe-ZnS量子点(QDs)成功地并入平均约190nm直径的新型发光糖球中。 优选地,葡萄球藻中含有羧基改性的氧化铁纳米晶体。 除了带负电荷的葡聚糖之间的静电吸引,带负电荷的CdSe-ZnS量子点(和带负电荷的氧化铁纳米晶体,如果存在)和带正电荷的聚赖氨酸,引入共价酰胺键以交联QD(和带负电荷的 氧化铁纳米晶体(如果存在)与多糖基质一起进一步稳定糖藻球。 纳米球表面的葡聚糖残基对葡萄糖结合蛋白 - 伴刀豆球蛋白A(Con A)表现出高亲和力。 结果,这些发光的CdSe-ZnS QD掺入的糖藻球是研究碳水化合物 - 蛋​​白质相互作用的有用工具,这是细菌和病毒感染的关键步骤。