期刊
ACS NANO
卷 6, 期 7, 页码 6049-6057出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn3011224
关键词
silver nanowire; plasmon coupling; synchronous fluorescence emission; single molecule fluorescence; HR-TEM
类别
资金
- cluster of excellence Nanosystems Initiative Munich (NIM)
- [DFG-SFB 749]
We investigated silver nanowires using correlative wide-field fluorescence and transmission electron microscopy. In the wide-field fluorescence images, synchronous emission from different distinct positions along the silver nanowires was observed. The sites of emission were separated spatially by up to several micrometers. Nanowires emitting in such cooperative manner were then also investigated with a combination of transmission electron microscopy based techniques, such as high-resolution, bright-field imaging, electron diffraction, high-angle annular dark-field imaging, and energy-dispersive X-ray spectroscopy. In particular, analyzing the chemical composition of the emissive areas using energy-dispersive X-ray spectroscopy led to the model that the active emissive centers are small silver clusters generated photochemically and that individual clusters are coupled via surface plasmons of the nanowire.
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