2015
DOI: 10.1038/srep12555
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Tunable Dipole Surface Plasmon Resonances of Silver Nanoparticles by Cladding Dielectric Layers

Abstract: The tunability of surface plasmon resonance can enable the highest degree of localised surface plasmon enhancement to be achieved, based on the emitting or absorbing wavelength. In this article, tunable dipole surface plasmon resonances of Ag nanoparticles (NPs) are realized by modification of the SiO2 dielectric layer thicknesses. SiO2 layers both beneath and over the Ag NPs affected the resonance wavelengths of local surface plasmons (LSPs). By adjusting the SiO2 thickness beneath the Ag NPs from 5 nm to 20 … Show more

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Cited by 88 publications
(63 citation statements)
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“…Irrespective of the reduction time the spectrum exhibits two prominent plasmonic features. A relatively weak peak at around ~366 nm arises due to the quadruple plasmonic contribution and a prominent dipole plasmonic peak appears at ~440 nm . Three different dipole plasmonic peaks are present in the deconvoluted spectrum with significantly small contribution of quadruple plasmonic oscillation peak (Figure S1).…”
Section: Resultsmentioning
confidence: 99%
“…Irrespective of the reduction time the spectrum exhibits two prominent plasmonic features. A relatively weak peak at around ~366 nm arises due to the quadruple plasmonic contribution and a prominent dipole plasmonic peak appears at ~440 nm . Three different dipole plasmonic peaks are present in the deconvoluted spectrum with significantly small contribution of quadruple plasmonic oscillation peak (Figure S1).…”
Section: Resultsmentioning
confidence: 99%
“…The nanoislands can have different modalities according to the fabrication conditions as previously mentioned (32,33). To compare the enhancements from the difference of initial film thickness, 10, 20 and 30 nm-thicknesses of silver films were prepared.…”
Section: Resultsmentioning
confidence: 99%
“…The modification in their shape is reflected in the optical absorption spectra in Figure D, where the LSPR peak corresponding to silver around 440 nm diminishes for 4 nm SNPG samples. This is because on heating, the smaller silver islands become larger particles, leading to broadening and redshift of the plasmon peak . Thus, the peak merges (by redshifting) with the resonance peak of the gold and appears as a smaller shoulder near the 580 nm feature in the optical absorption spectra.…”
Section: Resultsmentioning
confidence: 99%