Surface Enhanced Fluorescence of Rh6G with Gold Nanohole Arrays

Abstract

Five gold nanohole arrays with distinct aperture size were fabricated by magnetron sputtering technique. Fluorescence enhancements of Rh6G fluorophore in the close vicinity of gold nanohole arrays were observed. Up to 40 times increase of fluorescence intensity was obtained from gold nanohole arrays as compared with a smooth gold surface control sample. A double-peak curve was presented in the excitation spectrum of enhanced fluorescence emission when the excitation wavelength was scanning from 300 nm to 550 nm. It was found that smaller aperture size and proper excitation wavelength matching with the surface plasmon resonances condition were favorable for a better fluorescence enhancement.

Unraveling the Influence of Lanthanide Ions on Intra‐ and Inter‐Molecular Electronic Processes in Fe10Ln10 Nano‐Toruses

“…[ 13 ] The resulting plots of ( αhv ) 2 vs. hv are shown in Figure 2 b, and the resulting intercepts of the tangents to the abscissa (i.e. [ 14,15 ] This increase in the band gap can be attributed to quantum confi nement effects, which are well known for semiconductors. The estimated band gap of the Fe 6 reference compound was found to be about (3.48 ± 0.03) eV, which is much larger than that of α-Fe 2 O 3 nanoparticles (≈2.2 eV).…”

Charged particle single nanometre manufacturing

“…(b) Electron trajectories for FE-eSPL with 50V tip bias, 10 nm tip–resist distance and 10 nm thick calixarene resist (note that only one half of the tip and simulation area is shown). (c) Deposited energy distribution (EDD), describing the energy transferred from the electrons into the resist due to inelastic scattering, shown for various depths inside the resist for 30 keV EBL exposure of 100 nm calixarene film on a Si sample, for calculation details see [ 177 ]. (d) Energy loss distribution (ELD), describing the energy lost by the electrons due to inelastic scattering events, for 50 eV FE-eSPL exposure of 10 nm thick calixarene resist (note that the calculation differs from the EDD, thus giving different absolute values).…”

“…(d) Energy loss distribution (ELD), describing the energy lost by the electrons due to inelastic scattering events, for 50 eV FE-eSPL exposure of 10 nm thick calixarene resist (note that the calculation differs from the EDD, thus giving different absolute values). (a, c) Images reproduced with permission through Creative Commons Attribution (CC BY) from [ 177 ], 2013 SciencePG; (b, d) images reproduced with permission from [ 174 ].…”

Preparation of Ag/Au bimetallic nanostructures and their application in surface‐enhanced fluorescence

“…So considerable effort has been focused on the construction of effective SEF substrates with high local EM fields in order to produce strong fluorescence signals with higher contrast level. In detail, various methods have been adapted to fabricate metallic nanostructures substrates, including polished metal surfaces, nanograting, nanohole arrays, nanoparticles arrays, fractal-like nanostructure, and so on (9)(10)(11)(12)(13)(14)(15)(16)(17)(18). However, to the best of our knowledge, few reports about the creation of bimetallic nanostructures with random atom distribution as in the SEF-active substrate have been previously reported (19,20).…”