Anisotropic Ag@Au architectures through real-time surface-based strategy of synthesis: Large-area enhanced nanosensors
Here, we report an innovative facile polymer-templated synthesis of Ag/Au bimetallic nanoparticles (BNPs) on large surface for sensing. By controlling the reaction kinetics, the bimetallic nanoparticles have been successfully prepared with a variety of structures: heterostructures, eccentric core-sh...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-12-01
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| Series: | Sensing and Bio-Sensing Research |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214180422000575 |
| _version_ | 1828121689382191104 |
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| author | Abeer Fahes Aotmane En Naciri Mohammad Navvabpour Mohamad Baker Shoker Safi Jradi Suzanna Akil |
| author_facet | Abeer Fahes Aotmane En Naciri Mohammad Navvabpour Mohamad Baker Shoker Safi Jradi Suzanna Akil |
| author_sort | Abeer Fahes |
| collection | DOAJ |
| description | Here, we report an innovative facile polymer-templated synthesis of Ag/Au bimetallic nanoparticles (BNPs) on large surface for sensing. By controlling the reaction kinetics, the bimetallic nanoparticles have been successfully prepared with a variety of structures: heterostructures, eccentric core-shells, and physical mixtures of two metals. The amount and initial shape of the Au seeds determined the final architectures of bimetallic nanostructures. The underlying synthesis mechanism of BNPs was regulated by a seed-mediated growth (SMG) on the surface. The newly formed Ag atoms were directed to selectively nucleate and then epitaxially grow on specific facets of cubic/hexagonal Au seeds. Comprehensive results demonstrating an optical response of two metallic/poly (methyl methacrylate) (M+/PMMA) layers on opaque surfaces by micro-extinction measurements were obtained. Sensors based on anisotropic bimetallic substrates were ideal for sensitive 4,4′-bipyridine (4,4’-BP) detection. The polymer surface-induced accumulation of high electric fields on nanoscale sensing volumes of anisotropic core/shell BNPs allowed more analyte molecules to access their high-index facets. This sample possessed a high surface-enhanced Raman scattering (SERS) sensitivity despite only being validated on very small densities of surfaces; thanks to the synergistic effects between the two coupled metals. The present findings suggest that a surfactant-free synthesis can be used as a powerful mean of defining growth strategies based on silicon substrate platforms. |
| first_indexed | 2024-04-11T14:22:52Z |
| format | Article |
| id | doaj.art-fde31fedc33f4ccfa39239bf3320951c |
| institution | Directory Open Access Journal |
| issn | 2214-1804 |
| language | English |
| last_indexed | 2024-04-11T14:22:52Z |
| publishDate | 2022-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Sensing and Bio-Sensing Research |
| spelling | doaj.art-fde31fedc33f4ccfa39239bf3320951c2022-12-22T04:19:00ZengElsevierSensing and Bio-Sensing Research2214-18042022-12-0138100528Anisotropic Ag@Au architectures through real-time surface-based strategy of synthesis: Large-area enhanced nanosensorsAbeer Fahes0Aotmane En Naciri1Mohammad Navvabpour2Mohamad Baker Shoker3Safi Jradi4Suzanna Akil5LCP-A2MC, Jean Barriol Institute, Lorraine University, 1 Arago Avenue, 57070 Metz, FranceLCP-A2MC, Jean Barriol Institute, Lorraine University, 1 Arago Avenue, 57070 Metz, FranceLight, Nanomaterials, Nanotechnologies (L2n) Laboratory, CNRS ERL 7004, University of Technology of Troyes, 12 Rue Marie Curie, 10004 Troyes, FranceLCP-A2MC, Jean Barriol Institute, Lorraine University, 1 Arago Avenue, 57070 Metz, FranceLight, Nanomaterials, Nanotechnologies (L2n) Laboratory, CNRS ERL 7004, University of Technology of Troyes, 12 Rue Marie Curie, 10004 Troyes, FranceLCP-A2MC, Jean Barriol Institute, Lorraine University, 1 Arago Avenue, 57070 Metz, France; Corresponding author.Here, we report an innovative facile polymer-templated synthesis of Ag/Au bimetallic nanoparticles (BNPs) on large surface for sensing. By controlling the reaction kinetics, the bimetallic nanoparticles have been successfully prepared with a variety of structures: heterostructures, eccentric core-shells, and physical mixtures of two metals. The amount and initial shape of the Au seeds determined the final architectures of bimetallic nanostructures. The underlying synthesis mechanism of BNPs was regulated by a seed-mediated growth (SMG) on the surface. The newly formed Ag atoms were directed to selectively nucleate and then epitaxially grow on specific facets of cubic/hexagonal Au seeds. Comprehensive results demonstrating an optical response of two metallic/poly (methyl methacrylate) (M+/PMMA) layers on opaque surfaces by micro-extinction measurements were obtained. Sensors based on anisotropic bimetallic substrates were ideal for sensitive 4,4′-bipyridine (4,4’-BP) detection. The polymer surface-induced accumulation of high electric fields on nanoscale sensing volumes of anisotropic core/shell BNPs allowed more analyte molecules to access their high-index facets. This sample possessed a high surface-enhanced Raman scattering (SERS) sensitivity despite only being validated on very small densities of surfaces; thanks to the synergistic effects between the two coupled metals. The present findings suggest that a surfactant-free synthesis can be used as a powerful mean of defining growth strategies based on silicon substrate platforms.http://www.sciencedirect.com/science/article/pii/S2214180422000575Ag/AuBimetallic nanoparticlesPolymer-templatedOpaque surfacesSMGVIPS |
| spellingShingle | Abeer Fahes Aotmane En Naciri Mohammad Navvabpour Mohamad Baker Shoker Safi Jradi Suzanna Akil Anisotropic Ag@Au architectures through real-time surface-based strategy of synthesis: Large-area enhanced nanosensors Sensing and Bio-Sensing Research Ag/Au Bimetallic nanoparticles Polymer-templated Opaque surfaces SMG VIPS |
| title | Anisotropic Ag@Au architectures through real-time surface-based strategy of synthesis: Large-area enhanced nanosensors |
| title_full | Anisotropic Ag@Au architectures through real-time surface-based strategy of synthesis: Large-area enhanced nanosensors |
| title_fullStr | Anisotropic Ag@Au architectures through real-time surface-based strategy of synthesis: Large-area enhanced nanosensors |
| title_full_unstemmed | Anisotropic Ag@Au architectures through real-time surface-based strategy of synthesis: Large-area enhanced nanosensors |
| title_short | Anisotropic Ag@Au architectures through real-time surface-based strategy of synthesis: Large-area enhanced nanosensors |
| title_sort | anisotropic ag au architectures through real time surface based strategy of synthesis large area enhanced nanosensors |
| topic | Ag/Au Bimetallic nanoparticles Polymer-templated Opaque surfaces SMG VIPS |
| url | http://www.sciencedirect.com/science/article/pii/S2214180422000575 |
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