期刊
NANOSCALE
卷 6, 期 1, 页码 127-131出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3nr04726a
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- ZIT, Centre of Innovation and Technology of Vienna
- Austrian Research Promotion Agency (FFG) within the COMET framework
- Province of Lower Austria
- Austrian Science Fund (FWF) [SFB IR-ON F25-14, SFB NextLite F49-10]
We demonstrate that double-layered stacks of gold and insulator nanoparticles arranged on a flat gold surface dramatically enhance the sensitivity in absorption infrared microscopy. Through morphological variations of the nanoparticles, the frequency of the plasmon resonances can be tuned to match the frequency of the molecular vibration in the mid-infrared region. The results show that the nanostructures enhance the absorption signal of the molecules by a factor of up to similar to 2.2 x 10(6), while preserving their characteristic line-shape remarkably well.
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