Novel Au-Ag hybrid device for electrochemical SE(R)R spectroscopy in a wide potential and spectral range
A nanostructured gold-silver-hybrid electrode for SER spectroelectrochemistry was developed which advantageously combines the electrochemical properties and chemical stability of Au and the strong surface enhancement of (resonance) Raman scattering by Ag. The layered device consists of a massive nan...
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2009
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paper:paper_15306984_v9_n1_p298_Feng2023-06-08T16:19:50Z Novel Au-Ag hybrid device for electrochemical SE(R)R spectroscopy in a wide potential and spectral range Ag electrodes Au films Au surfaces Benchmark models Electrochemical performance Enhancement factors Heme proteins Hybrid devices Hybrid electrodes Nanostructured golds Organic layers Plasmon resonances Protein adsorptions Spectral ranges Surface enhancements Theoretical calculations Thin dielectric layers Adsorption Chemical stability Electrochemical electrodes Electrochemical properties Gold deposits Organic polymers Porphyrins Resonance Self assembled monolayers Silver Spectroelectrochemistry Spontaneous emission Gold gold nanomaterial silver article chemistry computer aided design electrochemistry equipment equipment design instrumentation materials testing methodology Raman spectrometry reproducibility sensitivity and specificity surface plasmon resonance ultrastructure Computer-Aided Design Electrochemistry Equipment Design Equipment Failure Analysis Gold Materials Testing Nanostructures Reproducibility of Results Sensitivity and Specificity Silver Spectrum Analysis, Raman Surface Plasmon Resonance A nanostructured gold-silver-hybrid electrode for SER spectroelectrochemistry was developed which advantageously combines the electrochemical properties and chemical stability of Au and the strong surface enhancement of (resonance) Raman scattering by Ag. The layered device consists of a massive nanoscopically rough Ag electrode, a thin (2 nm) organic layer, and a ca. 20 nm thick Au film that may be coated by self-assembled monolayers for protein adsorption. The SERR-spectroscopic and electrochemical performance of this device is demonstrated using the heme protein cytochrome c as a benchmark model system, thereby extending, for the first time, SE(R)R studies of molecules on Au surfaces to excitation in the violet spectral range. The enhancement factor is only slightly lower than for Ag electrodes which can be rationalized in terms of an efficient transfer of plasmon resonance excitation from the Ag to the Au coating. This mechanism, which requires a thin dielectric layer between the two metals, is supported by theoretical calculations. © 2009 American Chemical Society. 2009 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15306984_v9_n1_p298_Feng http://hdl.handle.net/20.500.12110/paper_15306984_v9_n1_p298_Feng |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Ag electrodes Au films Au surfaces Benchmark models Electrochemical performance Enhancement factors Heme proteins Hybrid devices Hybrid electrodes Nanostructured golds Organic layers Plasmon resonances Protein adsorptions Spectral ranges Surface enhancements Theoretical calculations Thin dielectric layers Adsorption Chemical stability Electrochemical electrodes Electrochemical properties Gold deposits Organic polymers Porphyrins Resonance Self assembled monolayers Silver Spectroelectrochemistry Spontaneous emission Gold gold nanomaterial silver article chemistry computer aided design electrochemistry equipment equipment design instrumentation materials testing methodology Raman spectrometry reproducibility sensitivity and specificity surface plasmon resonance ultrastructure Computer-Aided Design Electrochemistry Equipment Design Equipment Failure Analysis Gold Materials Testing Nanostructures Reproducibility of Results Sensitivity and Specificity Silver Spectrum Analysis, Raman Surface Plasmon Resonance |
| spellingShingle |
Ag electrodes Au films Au surfaces Benchmark models Electrochemical performance Enhancement factors Heme proteins Hybrid devices Hybrid electrodes Nanostructured golds Organic layers Plasmon resonances Protein adsorptions Spectral ranges Surface enhancements Theoretical calculations Thin dielectric layers Adsorption Chemical stability Electrochemical electrodes Electrochemical properties Gold deposits Organic polymers Porphyrins Resonance Self assembled monolayers Silver Spectroelectrochemistry Spontaneous emission Gold gold nanomaterial silver article chemistry computer aided design electrochemistry equipment equipment design instrumentation materials testing methodology Raman spectrometry reproducibility sensitivity and specificity surface plasmon resonance ultrastructure Computer-Aided Design Electrochemistry Equipment Design Equipment Failure Analysis Gold Materials Testing Nanostructures Reproducibility of Results Sensitivity and Specificity Silver Spectrum Analysis, Raman Surface Plasmon Resonance Novel Au-Ag hybrid device for electrochemical SE(R)R spectroscopy in a wide potential and spectral range |
| topic_facet |
Ag electrodes Au films Au surfaces Benchmark models Electrochemical performance Enhancement factors Heme proteins Hybrid devices Hybrid electrodes Nanostructured golds Organic layers Plasmon resonances Protein adsorptions Spectral ranges Surface enhancements Theoretical calculations Thin dielectric layers Adsorption Chemical stability Electrochemical electrodes Electrochemical properties Gold deposits Organic polymers Porphyrins Resonance Self assembled monolayers Silver Spectroelectrochemistry Spontaneous emission Gold gold nanomaterial silver article chemistry computer aided design electrochemistry equipment equipment design instrumentation materials testing methodology Raman spectrometry reproducibility sensitivity and specificity surface plasmon resonance ultrastructure Computer-Aided Design Electrochemistry Equipment Design Equipment Failure Analysis Gold Materials Testing Nanostructures Reproducibility of Results Sensitivity and Specificity Silver Spectrum Analysis, Raman Surface Plasmon Resonance |
| description |
A nanostructured gold-silver-hybrid electrode for SER spectroelectrochemistry was developed which advantageously combines the electrochemical properties and chemical stability of Au and the strong surface enhancement of (resonance) Raman scattering by Ag. The layered device consists of a massive nanoscopically rough Ag electrode, a thin (2 nm) organic layer, and a ca. 20 nm thick Au film that may be coated by self-assembled monolayers for protein adsorption. The SERR-spectroscopic and electrochemical performance of this device is demonstrated using the heme protein cytochrome c as a benchmark model system, thereby extending, for the first time, SE(R)R studies of molecules on Au surfaces to excitation in the violet spectral range. The enhancement factor is only slightly lower than for Ag electrodes which can be rationalized in terms of an efficient transfer of plasmon resonance excitation from the Ag to the Au coating. This mechanism, which requires a thin dielectric layer between the two metals, is supported by theoretical calculations. © 2009 American Chemical Society. |
| title |
Novel Au-Ag hybrid device for electrochemical SE(R)R spectroscopy in a wide potential and spectral range |
| title_short |
Novel Au-Ag hybrid device for electrochemical SE(R)R spectroscopy in a wide potential and spectral range |
| title_full |
Novel Au-Ag hybrid device for electrochemical SE(R)R spectroscopy in a wide potential and spectral range |
| title_fullStr |
Novel Au-Ag hybrid device for electrochemical SE(R)R spectroscopy in a wide potential and spectral range |
| title_full_unstemmed |
Novel Au-Ag hybrid device for electrochemical SE(R)R spectroscopy in a wide potential and spectral range |
| title_sort |
novel au-ag hybrid device for electrochemical se(r)r spectroscopy in a wide potential and spectral range |
| publishDate |
2009 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15306984_v9_n1_p298_Feng http://hdl.handle.net/20.500.12110/paper_15306984_v9_n1_p298_Feng |
| _version_ |
1768544055930650624 |