A one-pot synthesis of water soluble highly fluorescent silica nanoparticles

被引：50
作者：
Chandra, Sourov [1 ]
Beaune, Gregory [1 ]
Shirahata, Naoto [1 ]
Winnik, Francoise M. [1 ,2 ,3 ,4 ]
机构：
[1] Natl Inst Mat Sci, WPI Int Ctr Nanoarchitecton MANA, 1-1 Namiki, Tsukuba, Ibaraki 3050044, Japan
[2] Univ Montreal, Dept Chim, CP 6128 Succursale Ctr Ville, Montreal, PQ H3C 3J7, Canada
[3] Univ Helsinki, Dept Chem, FIN-00014 Helsinki, Finland
[4] Univ Helsinki, Fac Pharm, FIN-00014 Helsinki, Finland
来源：
JOURNAL OF MATERIALS CHEMISTRY B | 2017年 / 5卷 / 07期
关键词：
QUANTUM DOTS; TEMPERATURE-DEPENDENCE; LUMINESCENT SILICA; OPTICAL-PROPERTIES; IN-VIVO; NANOCRYSTALS; MONODISPERSE; SPHERES; PHOTOLUMINESCENCE; NANOCLUSTERS;
D O I：
10.1039/c6tb02813f
中图分类号：
TB3 [工程材料学]; R318.08 [生物材料学];
学科分类号：
0805 ; 080501 ; 080502 ;
摘要：
We report a one-pot synthesis of water dispersible fluorescent silica nanoparticles (NPs) functionalized with terminal amine groups, starting from silicon tetrabromide (SiBr4) and aminopropyltriethoxy silane (APTES). The NPs range from 1 to 2 nm in diameter, and exhibit an intense blue emission with a quantum yield (QY) of around 34% in water. They were characterized using XRD, XPS, TEM and FTIR spectroscopy for structural analysis. A tentative mechanism explaining the origin of the NPs emission in the blue region is presented based on the distinctive features of their low temperature photoluminescence (PL), photoluminescence excitation (PLE) spectrum and time correlated single photon counting lifetime decay profiles. The outstanding PL QY and photostability of the NPs, together with their water dispersibility and biocompatibility, constitute a unique set of properties among existing silica NPs and enable the application of the NPs in various fields.
引用
收藏
页码：1363 / 1370
页数：8
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