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One of the rapidly growing fields of nanotechnology is its manipulation of laser dyes' properties using nanoparticles and nanostructures due to its various applications, ranging from biomedical imaging to green energy. Silver nanoparticles (Ag NPs) of various concentrations and nanostructures with silver nanowire (Ag NW) were prepared using an electrical exploding wire technique (EEW) and was mixed with a?xed concentration of R6G dye. The behavior of energy transfer from the dye molecules (R6G) to nanomaterials (Ag NPs or plasmonic nanostructures) was examined using fluorescence spectra. The experimental results showed that the fluorescence intensity quenched with increasing concentration and density number of Ag NPs. The distance between the dye molecules and the nanostructures was studied, which was found to decrease as the concentration and density number of Ag NPs increased in the mixture. The energy transfer efficiency of nanostructures was compared. It was obtained that nanostructure (Ag NW@PDA@Ag NPs) achieved the best energy transfer efficiency of 85%. Our results indicated that this nanostructure could sense a distance around the metal nanoparticles (≈ 27.2 nm); thus the nanoparticle-based surface energy transfer (NSET) mechanism is dominated rather than F?rster resonance energy transfer (FRET) mechanism. This process is affected by concentration increasing of Ag NPs and coated morphology of Ag NWs by polydopamine (PDA) layer decorated by Ag NPs. The findings can be utilized in the large field of bio diagnostics and biochemistry. Regardless of bio-applications, the quenching mechanisms and rates are also of interest for SERS, (dye-sensitized) solar cells or nanooptics. However, we see the best potential in bio-sensing by managing the quenching rate by adjusting the shape or the concentration of nanostructures.


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The Effect of Plasmonic Nanostructures Prepared by Electrical Exploding Wire Technique on the Optical Properties of R6G Dye

Show Author's information Fouad Hamzah( )Hammad Humud
Department of Physics, College of Science, University of Baghdad, Baghdad, Iraq

Abstract

One of the rapidly growing fields of nanotechnology is its manipulation of laser dyes' properties using nanoparticles and nanostructures due to its various applications, ranging from biomedical imaging to green energy. Silver nanoparticles (Ag NPs) of various concentrations and nanostructures with silver nanowire (Ag NW) were prepared using an electrical exploding wire technique (EEW) and was mixed with a?xed concentration of R6G dye. The behavior of energy transfer from the dye molecules (R6G) to nanomaterials (Ag NPs or plasmonic nanostructures) was examined using fluorescence spectra. The experimental results showed that the fluorescence intensity quenched with increasing concentration and density number of Ag NPs. The distance between the dye molecules and the nanostructures was studied, which was found to decrease as the concentration and density number of Ag NPs increased in the mixture. The energy transfer efficiency of nanostructures was compared. It was obtained that nanostructure (Ag NW@PDA@Ag NPs) achieved the best energy transfer efficiency of 85%. Our results indicated that this nanostructure could sense a distance around the metal nanoparticles (≈ 27.2 nm); thus the nanoparticle-based surface energy transfer (NSET) mechanism is dominated rather than F?rster resonance energy transfer (FRET) mechanism. This process is affected by concentration increasing of Ag NPs and coated morphology of Ag NWs by polydopamine (PDA) layer decorated by Ag NPs. The findings can be utilized in the large field of bio diagnostics and biochemistry. Regardless of bio-applications, the quenching mechanisms and rates are also of interest for SERS, (dye-sensitized) solar cells or nanooptics. However, we see the best potential in bio-sensing by managing the quenching rate by adjusting the shape or the concentration of nanostructures.

Keywords: Nanoparticles, Fluorescence quenching, Plasmonic nanostructures, Rhodamine 6G (R6G) dye, Density number of Ag NPs, Energy transfer efficiency

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Publication history
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Publication history

Received: 08 June 2020
Accepted: 19 October 2020
Published: 23 April 2021
Issue date: June 2021

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© Fouad Hamzah, Hammad Humud.

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This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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