Near-Infrared Surface-Enhanced Raman Spectroscopy (NIR-SERS) for the Identification of Eosin Y: Theoretical Calculations and Evaluation of Two Different Nanoplasmonic Substrates
| Autor: | George C. Schatz, Amber S. Davis, Nicholas Valley, Nathan G. Greeneltch, Richard P. Van Duyne, Francesca Casadio, Nilam C. Shah |
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| Rok vydání: | 2012 |
| Předmět: |
Silver
Spectroscopy Near-Infrared Time Factors Surface Properties Near-infrared spectroscopy technology industry and agriculture Metal Nanoparticles Nanotechnology Time-dependent density functional theory Surface-enhanced Raman spectroscopy Spectrum Analysis Raman Photobleaching chemistry.chemical_compound symbols.namesake chemistry symbols Eosine Yellowish-(YS) Quantum Theory Spectrophotometry Ultraviolet Colloids Physical and Theoretical Chemistry Eosin Y Absorption (electromagnetic radiation) Raman spectroscopy Plasmon |
| Zdroj: | The Journal of Physical Chemistry A. 116:11863-11869 |
| ISSN: | 1520-5215 1089-5639 |
| DOI: | 10.1021/jp3081035 |
| Popis: | This work demonstrates the development of near-infrared surface-enhanced Raman spectroscopy (NIR-SERS) for the identification of eosin Y, an important historical dye. NIR-SERS benefits from the absence of some common sources of SERS signal loss including photobleaching and plasmonic heating, as well as an advantageous reduction in fluorescence, which is beneficial for art applications. This work also represents the first rigorous comparison of the enhancement factors and the relative merits of two plasmonic substrates utilized in art applications; namely, citrate-reduced silver colloids and metal film over nanosphere (FON) substrates. Experimental spectra are correlated in detail with theoretical absorption and Raman spectra calculated using time-dependent density functional theory (TDDFT) in order to elucidate molecular structural information and avoid relying on pigment spectral libraries for dye identification. |
| Databáze: | OpenAIRE |
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