期刊
NANO LETTERS
卷 12, 期 8, 页码 4385-4391出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl302196a
关键词
Gold nanorods; photothermal; luminescence; QY; reshaping; interband
类别
资金
- ERC
- Netherlands Organization for Scientific Research (NWO)
- NWO
We study the luminescence quantum yield (QY) of single gold nanorods with different aspect ratios and volumes. Compared to gold nanospheres, we observe an increase of QY by about an order of magnitude for particles with a plasmon resonance >650 nm. The observed trend in QY is further confirmed by controlled reshaping of a single gold nanorod to a spherelike shape. Moreover, we identify two spectral components, one around 500 nm originating from a combination of interband transitions and the transverse plasmon and one coinciding with the longitudinal plasmon band. These components are analyzed by correlating scattering and luminescence spectra of single nanorods and performing polarization sensitive measurements. Our study contributes to the understanding of luminescence from gold nanorods. The enhanced QY we report can benefit applications in biological and soft matter studies.
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