Surface-Enhanced Raman Scattering Studies of Au-Ag Bimetallic Nanoparticles with a Tunable Surface Plasmon Resonance Wavelength Synthesized by Picosecond Laser Irradiation
Here, we present a simple and green method of preparing Au-Ag bimetallic nanoparticles (NPs) with a tunable surface plasmon resonance (SPR) wavelength by using picosecond laser irradiation. Au-Ag alloy NPs have been produced by irradiating the solutions containing respective metallic salts in a poly...
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MDPI AG
2023-12-01
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| author | P. Babuji Md Abu Taher Mudasir H. Dar D. Narayana Rao P. Gopala Krishna V. Saikiran |
| author_facet | P. Babuji Md Abu Taher Mudasir H. Dar D. Narayana Rao P. Gopala Krishna V. Saikiran |
| author_sort | P. Babuji |
| collection | DOAJ |
| description | Here, we present a simple and green method of preparing Au-Ag bimetallic nanoparticles (NPs) with a tunable surface plasmon resonance (SPR) wavelength by using picosecond laser irradiation. Au-Ag alloy NPs have been produced by irradiating the solutions containing respective metallic salts in a polyvinyl alcohol (PVA) matrix using a picosecond laser in a single-step process. The SPR wavelength of the Au-Ag bimetallic NPs is observed to be shifted/changed with the Au-Ag concentration and the laser irradiation parameters. The Au-Ag NPs embedded in the PVA matrix are advantageous for Surface-Enhanced Raman scattering (SERS) applications. The estimated enhancement factors (EFs) were observed to vary as a function of conditions of the Au-Ag bimetallic alloy NPs synthesis and also on the concentration of Au at a fixed input fluence of irradiation. The SERS active platforms of Au-Ag bimetallic NPs showed EFs as high as of the order of 10<sup>8</sup> for Crystal Violet (CV) dye samples at nano molar concentrations. The present study demonstrates a simple, single-step, and green method that fabricates Au-Ag alloy-based nanocomposites suitable for SERS investigations with significantly higher orders of EFs. |
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| issn | 2304-6732 |
| language | English |
| last_indexed | 2024-03-08T20:26:30Z |
| publishDate | 2023-12-01 |
| publisher | MDPI AG |
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| series | Photonics |
| spelling | doaj.art-ec7cbb4c70974b048c4c3d5a8cb7f5622023-12-22T14:32:51ZengMDPI AGPhotonics2304-67322023-12-011012134510.3390/photonics10121345Surface-Enhanced Raman Scattering Studies of Au-Ag Bimetallic Nanoparticles with a Tunable Surface Plasmon Resonance Wavelength Synthesized by Picosecond Laser IrradiationP. Babuji0Md Abu Taher1Mudasir H. Dar2D. Narayana Rao3P. Gopala Krishna4V. Saikiran5Department of Physics, School of Sciences, GITAM Deemed to Be University, Visakhapatnam 530045, IndiaDepartment of Electrical Engineering, Indian Institute of Technology Hyderabad, Hyderabad 502285, IndiaDepartment of Physics, Govt. Degree College, Beerwah, Budgam, Jammu and Kashmir 193411, IndiaSchool of Physics, University of Hyderabad, Hyderabad 500046, IndiaDepartment of Physics, School of Sciences, GITAM Deemed to Be University, Visakhapatnam 530045, IndiaDepartment of Physics, School of Sciences, GITAM Deemed to Be University, Visakhapatnam 530045, IndiaHere, we present a simple and green method of preparing Au-Ag bimetallic nanoparticles (NPs) with a tunable surface plasmon resonance (SPR) wavelength by using picosecond laser irradiation. Au-Ag alloy NPs have been produced by irradiating the solutions containing respective metallic salts in a polyvinyl alcohol (PVA) matrix using a picosecond laser in a single-step process. The SPR wavelength of the Au-Ag bimetallic NPs is observed to be shifted/changed with the Au-Ag concentration and the laser irradiation parameters. The Au-Ag NPs embedded in the PVA matrix are advantageous for Surface-Enhanced Raman scattering (SERS) applications. The estimated enhancement factors (EFs) were observed to vary as a function of conditions of the Au-Ag bimetallic alloy NPs synthesis and also on the concentration of Au at a fixed input fluence of irradiation. The SERS active platforms of Au-Ag bimetallic NPs showed EFs as high as of the order of 10<sup>8</sup> for Crystal Violet (CV) dye samples at nano molar concentrations. The present study demonstrates a simple, single-step, and green method that fabricates Au-Ag alloy-based nanocomposites suitable for SERS investigations with significantly higher orders of EFs.https://www.mdpi.com/2304-6732/10/12/1345Au-Ag bimetallic alloy nanoparticleslaser irradiationSERSsurface plasmon resonance |
| spellingShingle | P. Babuji Md Abu Taher Mudasir H. Dar D. Narayana Rao P. Gopala Krishna V. Saikiran Surface-Enhanced Raman Scattering Studies of Au-Ag Bimetallic Nanoparticles with a Tunable Surface Plasmon Resonance Wavelength Synthesized by Picosecond Laser Irradiation Photonics Au-Ag bimetallic alloy nanoparticles laser irradiation SERS surface plasmon resonance |
| title | Surface-Enhanced Raman Scattering Studies of Au-Ag Bimetallic Nanoparticles with a Tunable Surface Plasmon Resonance Wavelength Synthesized by Picosecond Laser Irradiation |
| title_full | Surface-Enhanced Raman Scattering Studies of Au-Ag Bimetallic Nanoparticles with a Tunable Surface Plasmon Resonance Wavelength Synthesized by Picosecond Laser Irradiation |
| title_fullStr | Surface-Enhanced Raman Scattering Studies of Au-Ag Bimetallic Nanoparticles with a Tunable Surface Plasmon Resonance Wavelength Synthesized by Picosecond Laser Irradiation |
| title_full_unstemmed | Surface-Enhanced Raman Scattering Studies of Au-Ag Bimetallic Nanoparticles with a Tunable Surface Plasmon Resonance Wavelength Synthesized by Picosecond Laser Irradiation |
| title_short | Surface-Enhanced Raman Scattering Studies of Au-Ag Bimetallic Nanoparticles with a Tunable Surface Plasmon Resonance Wavelength Synthesized by Picosecond Laser Irradiation |
| title_sort | surface enhanced raman scattering studies of au ag bimetallic nanoparticles with a tunable surface plasmon resonance wavelength synthesized by picosecond laser irradiation |
| topic | Au-Ag bimetallic alloy nanoparticles laser irradiation SERS surface plasmon resonance |
| url | https://www.mdpi.com/2304-6732/10/12/1345 |
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