Surface-Enhanced Raman Scattering of MEH-PPV on Gold and Silver Nanoparticles
| Autor: | Alvaro C. C. Barra, Celly M. S. Izumi, Nathalia S. Campos, Beatriz R. Moraes |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Article Subject Nanoparticle 02 engineering and technology 010402 general chemistry Photochemistry 01 natural sciences Spectral line Silver nanoparticle Analytical Chemistry Metal symbols.namesake Adsorption lcsh:QC350-467 Spectroscopy chemistry.chemical_classification Polymer 021001 nanoscience & nanotechnology Atomic and Molecular Physics and Optics 0104 chemical sciences chemistry visual_art visual_art.visual_art_medium symbols 0210 nano-technology Layer (electronics) lcsh:Optics. Light Raman scattering |
| Zdroj: | Journal of Spectroscopy, Vol 2018 (2018) |
| ISSN: | 2314-4920 |
| DOI: | 10.1155/2018/6924758 |
| Popis: | The interaction of poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene] (MEH-PPV) with Au or Ag nanospheres, Au nanostars, and Ag nanoprisms was investigated using surface-enhanced Raman scattering (SERS). The SERS investigation showed that adsorption of MEH-PPV strongly depends on the nature of the nanoparticle surface. On gold nanostars that present a thick layer of capping polymer, SERS spectrum is only observed in relatively concentrated MEH-PPV solution (1 mmol L−1). On the other hand, Au and Ag nanospheres present SERS spectra down to 10−6 mol L−1 and no chemical interaction of MEH-PPV and metal surface is observed. The spectra of MEH-PPV on Ag nanoprisms with PVP as stabilizing agent suggest that the capping polymer induces a planar conformation of MEH-PPV and consequently an increase of conjugation length. These results give support for the application of MEH-PPV on optoelectronics in which interfacial effects are critical in the device efficiency and stability. |
| Databáze: | OpenAIRE |
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