发明名称 |
Synthesis of fluorescent noble metal nanoparticles |
摘要 |
A process for the production of fluorescent nanoparticles selected from noble metal or silica nanoparticles. Noble metals or silica nanoparticles provide a platform to which fluorophores and other detection molecules can be added. The fluorescent nanoparticles can be used as regents, diagnostic assays and in the tracking or targeting of tumors. |
申请公布号 |
US9395371(B2) |
申请公布日期 |
2016.07.19 |
申请号 |
US201113825771 |
申请日期 |
2011.09.23 |
申请人 |
Chan Warren;Perrault Steven;Chou Leo |
发明人 |
Chan Warren;Perrault Steven;Chou Leo |
分类号 |
B82Y40/00;B82Y30/00;B82Y5/00;G01N33/58;A61K33/24;B22F1/00;C22C5/02;G01N33/533 |
主分类号 |
B82Y40/00 |
代理机构 |
Miller Thomson LLP |
代理人 |
Krupnik Eduardo;Miller Thomson LLP |
主权项 |
1. A process for the production of noble metal or silica nanoparticles as probes capable to fluoresce to label cells and tissues, the method comprising:(1) providing a platform of the nanoparticles;(2) covering the surfaces of the nanoparticles to saturation with thiol-terminated polymers by one of the following methods:
(a) mixing the nanoparticles with methoxy-(polyethylene glycol)-thiol, the methoxy-(polyethylene glycol)-thiol having a MW of about 10,000 atomic mass units (amu), and biotin-(polyethylene glycol)-thiol, the biotin-(polyethylene glycol)-thiol having a MW of about 10,000 amu; (b) mixing the nanoparticles with fluorescently-labeled methoxy-(polyethylene glycol)-thiol, the methoxy-(polyethylene glycol)-thiol having a MW of about 10,000 amu and biotin-(polyethylene glycol)-thiol, the biotin-(polyethylene glycol)-thiol having a MW of about 10,000 amu; (c) coordinating thiol and biotin thiol to the surfaces of the nanoparticles by a non-covalent bond; and (d) directly conjugating methoxy-thiol and biotin-thiol to the surfaces of the nanoparticles,whereby the polymers bind to the surfaces of the nanoparticles as a brush layer via thiol particle coordination of the thiol ends so that the biotin or methoxy ends are free, thereby obtaining polymer-covered nanoparticles;(3) homogeneously mixing the resulting polymer-covered nanoparticles with fluorophore labeled avidin or an avidin derivative thereof in proportions of 1 biotin molecule for every 10 to 1000 avidin molecules thereby obtaining fluorescent multi-coloured nanoparticle-avidin complexes and the fluorophore labeled avidin or a derivative thereof being spaced away from the surface of the noble metal or silica nanoparticles, thus reducing or removing the potential quenching of the fluorophore. |
地址 |
Toronto CA |