Highly luminescent gold nanoparticles: effect of ruthenium distance for nanoprobes with enhanced lifetimes.
Highly luminescent gold nanoparticles: effect of ruthenium distance for nanoprobes with enhanced lifetimes.
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DOI：
10.1039/c5fd00108k
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发表时间：
2015-12
影响因子：
3.4
通讯作者：
Shani A. M. Osborne;Z. Pikramenou
中科院分区：
文献类型：
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作者：
Shani A. M. Osborne;Z. Pikramenou
研究了金纳米粒子（AuNPs）表面包覆钌配合物的物理化学性质，探讨了钌发光中心与金表面距离对AuNPs物理化学性质的影响。三个钌探针，RuS1，RuS6和RuS12，与不同长度的间隔单元之间的表面活性基团和钌中心的发光寿命。金属配合物连接到AuNP 13，AuNP 50和AuNP 100通过硫醇基团使用的方法预涂纳米粒子与氟化表面活性剂。当与短和中等连接单元复合物RuS1（20%）和（RuS6 40%）的增加相比时，较长间隔单元复合物RuS12的发光寿命在附接至AuNP时增强70%。表面活性剂在钌涂覆的AuNP的寿命增加中的作用被示出为对于中等间隔探针RuS6更大。AuNP的尺寸从13 nm到50 nm或100 nm的变化没有影响。
The photophysical properties of gold nanoparticles, AuNPs, with sizes of 13, 50 and 100 nm in diameter, coated with surface-active ruthenium complexes have been studied to investigate the effect of the distance of the ruthenium luminescent centre from the gold surface. Luminescence lifetimes of the three ruthenium probes, RuS1, RuS6 and RuS12, with different length spacer units between the surface active groups and the ruthenium centre were taken. The metal complexes were attached to AuNP13, AuNP50 and AuNP100 via thiol groups using a method of precoating the nanoparticles with a fluorinated surfactant. The luminescence lifetime of the longer spacer unit complex, RuS12, was enhanced by 70% upon attachment to the AuNP when compared to the increase of the short and medium linker unit complexes, RuS1 (20%) and (RuS6 40%) respectively. The effect of the surfactant in the lifetime increase of the ruthenium coated AuNPs was shown to be larger for the medium spacer probe, RuS6. There was no effect of the change of the size of the AuNPs from 13 to 50 or 100 nm.