Nanoelectrode-emitter spectral overlap amplifies surface enhanced electrogenerated chemiluminescence
| Autor: | Charlotte Flatebo, Thomas S. Heiderscheit, Seyyed Ali Hosseini Jebeli, Leonardo Scarabelli, Alexander Al-Zubeidi, Christy F. Landes, Miranda J. Gallagher, Rashad Baiyasi, Stephan Link, Sean S. E. Collins, Wei-Shun Chang |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Luminescence Light General Physics and Astronomy Nanoparticle Metal Nanoparticles 010402 general chemistry 01 natural sciences Signal 0103 physical sciences Organometallic Compounds Physical and Theoretical Chemistry Spectroscopy Electrodes Plasmon Common emitter Plasmonic nanoparticles 010304 chemical physics Propylamines business.industry Electrochemical Techniques 0104 chemical sciences Colloidal gold Luminescent Measurements Optoelectronics Gold business |
| Zdroj: | The Journal of chemical physics. 151(14) |
| ISSN: | 1089-7690 |
| Popis: | Electrogenerated chemiluminescence (ECL) is a promising technique for low concentration molecular detection. To improve the detection limit, plasmonic nanoparticles have been proposed as signal boosting antennas to amplify ECL. Previous ensemble studies have hinted that spectral overlap between the nanoparticle antenna and the ECL emitter may play a role in signal enhancement. Ensemble spectroscopy, however, cannot resolve heterogeneities arising from colloidal nanoparticle size and shape distributions, leading to an incomplete picture of the impact of spectral overlap. Here, we isolate the effect of nanoparticle-emitter spectral overlap for a model ECL system, coreaction of tris(2,2'-bipyridyl)dichlororuthenium(ii) hexahydrate and tripropylamine, at the single-particle level while minimizing other factors influencing ECL intensities. We found a 10-fold enhancement of ECL among 952 gold nanoparticles. This signal enhancement is attributed exclusively to spectral overlap between the nanoparticle and the emitter. Our study provides new mechanistic insight into plasmonic enhancement of ECL, creating opportunities for low concentration ECL sensing. |
| Databáze: | OpenAIRE |
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