Fluorescence properties of methylene blue molecules coupled with metal oxide nanoparticles

Pahang, F.; Parvin, Parviz; Ghafoorifard, Hassan; Bavali, Ali; Moafi, A.

doi:10.1364/osac.387557

Cited by 18 publications

(15 citation statements)

References 33 publications

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“…To reveal the net Raman signal in SiNWs:Au-NPs structures, the PL background is subtracted from the total signal, as shown in Figure 6 b. The PL spectrum is interpolated by a polynomial function centered near 1300 cm −1 , which corresponds to a wavelength of 690 nm, in agreement with the well-known fluorescence spectrum of MB [ 50 ]. The spectrum with the subtracted PL contribution allows us to evaluate the net SERS effect in SiNWs:Au-NPs.…”

Section: Resultsmentioning

confidence: 99%

Surface-Enhanced Raman Scattering from Dye Molecules in Silicon Nanowire Structures Decorated by Gold Nanoparticles

Ikramova

Utegulov

Dikhanbayev

et al. 2022

IJMS

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Silicon nanowires (SiNWs) prepared by metal-assisted chemical etching of crystalline silicon wafers followed by deposition of plasmonic gold (Au) nanoparticles (NPs) were explored as templates for surface-enhanced Raman scattering (SERS) from probe molecules of Methylene blue and Rhodamine B. The filling factor by pores (porosity) of SiNW arrays was found to control the SERS efficiency, and the maximal enhancement was observed for the samples with porosity of 55%, which corresponded to dense arrays of SiNWs. The obtained results are discussed in terms of the electromagnetic enhancement of SERS related to the localized surface plasmon resonances in Au-NPs on SiNW’s surfaces accompanied with light scattering in the SiNW arrays. The observed SERS effect combined with the high stability of Au-NPs, scalability, and relatively simple preparation method are promising for the application of SiNW:Au-NP hybrid nanostructures as templates in molecular sensorics.

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Section: Resultsmentioning

confidence: 99%

Surface-Enhanced Raman Scattering from Dye Molecules in Silicon Nanowire Structures Decorated by Gold Nanoparticles

Ikramova

Utegulov

Dikhanbayev

et al. 2022

IJMS

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“…The expansion of the optical path (nd) due to excessive AgNPs in MB solution increased the re-absorption of the solution, leading to a red shift in the fluorescence spectra. Furthermore, the intensities of the fluorescence spectra were reduced after adding AgNPs to the MB solution due to the increase in the quenching process for high densities of Ag nanoparticles [62]. In addition, the width of the surface plasmon resonance beam appeared to influence the electron transmission process, and thus the intensity of the fluorescence in this instance was found to decrease for all concentrations.…”

Section: Fluorescence Measurements Of Samplesmentioning

confidence: 93%

The Effect of Silver Nanoparticles on a Mixture of MB-dye/PVA-Polymer as Determined by Absorption and Emission Spectra Measurements

Jawad¹,

Shiltagh²,

Aboud³

et al. 2021

NanoWorld J

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The effect of silver nanoparticles (AgNPs) synthesized via the pulsed laser ablation in liquid (PLAL) technique was investigated for a mixture of PVA/MB solution. Methylene blue dye (MB) and polyvinyl alcohol (PVA) polymer were prepared using distilled water as the solvent in different concentrations (1x10 -4 , 3x10 -4 , 5x10 -4 and 7x10 -4 ) Ml. UV-Vis absorption and fluorescence spectra were recorded to characterize the solutions prepared before and after adding the AgNPs solution. It was observed that the concentration of MB dye had a significant impact on the absorption spectrum of the pure dye. The maximum absorption was obtained at 7x10 -4 Ml at a wavelength of 660 nm. On the other hand, at a fixed concentration of AgNPs, and using a range of MB concentrations, the intensity of the absorption was found to decrease for MB/PVA/AgNps mixture due to the width of the surface plasmon resonance beam. Furthermore, fluorescence spectra showed the same behaviour after adding AgNPs. However, these intensities increase with increasing AgNps particle concentrations, indicating the effect of silver nanoparticles, due to their high surface area, was to show good catalytic activity towards products. The PVA/MB/AgNPs composite could well represent an effective treatment for the removal organic dye in wastewater.

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“…Normally, the chemical enhancement mechanism is contributed by charge transfer between molecules and a SERS substrate. Due to the fact that MB has an excitation peak at approximately 663 nm [33], this work utilized a laser with an excitation wavelength of 632 nm (1.96 eV). Meanwhile, the energy band gap of HfN was approximately 3.6 eV calculated from a Tauc plot (as shown in Figure S4), which was significantly greater than the energy of the exciting source.…”

Section: Sers Performance Of Hfn Thin Filmsmentioning

confidence: 99%

Tailoring Properties of Hafnium Nitride Thin Film via Reactive Gas-Timing RF Magnetron Sputtering for Surface Enhanced-Raman Scattering Substrates

et al. 2022

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This study successfully demonstrated the tailoring properties of hafnium nitride (HfN) thin films via reactive gas-timing (RGT) RF magnetron sputtering for surface-enhanced Raman spectroscopy (SERS) substrate applications. The optimal RGT sputtering condition was investigated by varying the duration time of the argon and nitrogen gas sequence. The RGT technique formed thin films with a grain size of approximately 15 nm. Additionally, the atomic ratios of nitrogen and hafnium can be controlled between 0.24 and 0.28, which is greater than the conventional technique, resulting in a high absorbance in the long wavelength region. Moreover, the HfN thin film exhibited a high Raman signal intensity with an EF of 8.5 × 104 to methylene blue molecules and was capable of being reused five times. A superior performance of HfN as a SERS substrate can be attributed to its tailored grain size and chemical composition, which results in an increase in the hot spot effect. These results demonstrate that the RGT technique is a viable method for fabricating HfN thin films with controlled properties at room temperature, which makes them an attractive material for SERS and other plasmonic applications.

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Fluorescence properties of methylene blue molecules coupled with metal oxide nanoparticles

Cited by 18 publications

References 33 publications

Surface-Enhanced Raman Scattering from Dye Molecules in Silicon Nanowire Structures Decorated by Gold Nanoparticles

Surface-Enhanced Raman Scattering from Dye Molecules in Silicon Nanowire Structures Decorated by Gold Nanoparticles

The Effect of Silver Nanoparticles on a Mixture of MB-dye/PVA-Polymer as Determined by Absorption and Emission Spectra Measurements

Tailoring Properties of Hafnium Nitride Thin Film via Reactive Gas-Timing RF Magnetron Sputtering for Surface Enhanced-Raman Scattering Substrates

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