Enhanced Raman scattering by molecules adsorbed at the surface of colloidal spheroids

Wang, D. S.; Kerker, Milton

doi:10.1103/physrevb.24.1777

Cited by 361 publications

(198 citation statements)

References 19 publications

Supporting

Mentioning

186

Contrasting

Unclassified

Order By: Relevance

“…The charge transfer is localized at active sites, and therefore, an inhomogeneous enhancement effects as well as structural changes of the molecules complicate the quantitative interpretation of the SERS results. Theoretical models to explain the electromagnetic effects 10,11 as well as the chemical effects 12 are available.…”

Section: Introductionmentioning

confidence: 99%

Surface enhanced Raman scattering (SERS)—a quantitative analytical tool?

Sackmann

Materny

2006

J Raman Spectroscopy

146

113

View full text Add to dashboard Cite

Raman spectroscopy is a widely used analytical tool capable of providing valuable information about the chemical structure and composition of molecules. In order to detect substances also at a very low concentration levels, Surface Enhanced Raman Scattering (SERS) was introduced. The different amplification mechanisms result in extreme sensitivity, however, a quantitative use of SERS appears to be problematic. Especially, when deploying silver sols as SERS substrates, the reproducibility of the signal intensities for a given substance concentration is questionable. Experimental results of an investigation of this problem for low concentrations of adenine are presented. Comparison with results obtained for different SERS substrates by other authors reveals clearly different dependencies. Only in a very limited concentration range reproducible and therefore quantitatively utilizable data could be obtained.

show abstract

Section: Introductionmentioning

confidence: 99%

Surface enhanced Raman scattering (SERS)—a quantitative analytical tool?

Sackmann

Materny

2006

J Raman Spectroscopy

146

113

View full text Add to dashboard Cite

show abstract

“…The enhancement of the Raman signal induced by metal nanoparticles, which is the basis of SERS spectroscopy, can be understood as a contribution from two different mechanisms: electromagnetic and charge-transfer mechanisms. [9][10][11][12] In the electromagnetic mechanism, the intensity of the surface plasmon resonance of the metal depends on many factors including the wavelength of the incident light and the morphology of the metal surface. 10 The role of these nanoparticles is correlated with the mechanism involved in the SERS enhancement, being essential the formation of surface nanoparticles to induce a huge intensification of Raman emission through localized plasmon resonance in order to obtain high quality SERS spectra.…”

Section: Introductionmentioning

confidence: 99%

Surface-enhanced Raman Spectroscopy of Benzimidazolic Fungicides: Benzimidazole and Thiabendazole

Kim¹,

Kim²,

Lee³

et al. 2009

Bulletin of the Korean Chemical Society

View full text Add to dashboard Cite

Surface-enhanced Raman Scattering (SERS) spectroscopy is applied to the study of the adsorption of benzoimidazolic fungicides benzimidazole (BIZ) and thiabendazole (TBZ) on silver mirrors. The influence of pH on the adsorption mechanism was investigated. In case of BIZ, two different adsorption mechanisms are deduced depending on the experimental conditions: via the π electrons of the ring in neutral conditions and through an ionic pairing of protonated nitrogen atom with the chloride adsorbed on the metal surface. The SERS spectra of TBZ revealed that most molecules were adsorbed on silver surface by the π electrons in neutral and acidic conditions but in acid conditions, some molecules were adsorbed via the sulfur and nitrogen atoms tilted slightly to the surface.

show abstract

“…Such absorption enhancement may comprise both the single-particle enhancements as addressed by Gersten and Nitzan 15 and collective phenomena as analyzed by Chance et al, 16 Wang and Kerker. 5,17 …”

Section: Resultsmentioning

confidence: 99%

Strong enhancement of optical absorbance from ionic self-assembled multilayer thin films of nanocluster Pt and polymer dye

Liu

Claus

1999

Journal of Applied Physics

View full text Add to dashboard Cite

The observation of unusually enhanced optical absorbance spectra of ionic self assembled multilayer (ISAM) thin films composed of alternating layers of Pt nanoclusters (<1 nm dimension) and polymer dye is reported. The first bilayer absorbance is found to be considerably larger than that of several succeeding bilayers even though there is no difference in composition for each bilayer. A layer-by-layer-dependent redshift in maximum wavelength position due to the strong coupling of metals and polymer molecules is observed. The saturation absorption is obtained for the first time when the required thickness of the ISAM film is deposited. The large and unusual enhancement effects are attributed to both the charge-transfer mechanism and very large local fields and collective phenomena near the surface of the small metal clusters/electrolytes and at the interfaces between the cluster/polymer multilayers.

show abstract

Enhanced Raman scattering by molecules adsorbed at the surface of colloidal spheroids

Cited by 361 publications

References 19 publications

Surface enhanced Raman scattering (SERS)—a quantitative analytical tool?

Surface enhanced Raman scattering (SERS)—a quantitative analytical tool?

Surface-enhanced Raman Spectroscopy of Benzimidazolic Fungicides: Benzimidazole and Thiabendazole

Strong enhancement of optical absorbance from ionic self-assembled multilayer thin films of nanocluster Pt and polymer dye

Contact Info

Product

Resources

About