Silver Nanoparticles as Enhancing Substrates for Raman and Fluorescence Spectroscopy

• Authors: M. Cyrankiewicz , T. Wybranowski , S. Kruszewski
• Languages of publication: EN

Abstracts

EN

The enhancing properties of silver nanoparticles in surface-enhanced Raman scattering (SERS) and metal-enhanced fluorescence (MEF) are studied in this work. The obtained results confirm that the partial aggregation of nanoparticles leads to a great increase of Raman scattering cross-section but there are significant differences in SERS-activity of colloidal silver treated with various aggregating compounds. The differences are interpreted through the analysis of both experimental and computational results. The same silver colloid covered with silica shell preventing the fluorescence quenching makes possible a several-fold increase in fluorescence emission. The effect strongly depends on thickness of the outer layer of nanoparticles. Geometrical parameters of nanoparticles (radius or radius and thickness of the adsorption layer in core-shell systems) are determined on the basis of the dynamic light scattering (DLS) data and extinction spectra analysis.

Keywords

EN

33.20.Fb; 33.20.Kf; 32.50.+d; 61.46.Df; 73.20.Mf; 78.67.Bf; 87.83.+a

Discipline

• 78.67.Bf: Nanocrystals, nanoparticles, and nanoclusters
• 32.50.+d: Fluorescence, phosphorescence (including quenching)
• 73.20.Mf: Collective excitations (including excitons, polarons, plasmons and other charge-density excitations)(for collective excitations in quantum Hall effects, see 73.43.Lp)
• 33.20.Kf: Visible spectra
• 61.46.Df: Structure of nanocrystals and nanoparticles ("colloidal" quantum dots but not gate-isolated embedded quantum dots)
• 33.20.Fb: Raman and Rayleigh spectra (including optical scattering)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2014
• Volume: 125
• Issue: 4A
• Pages: A-11-A-15

Dates

published

2014-04

Contributors

author

M. Cyrankiewicz

• Medical Physics Division, Biophysics Department, Collegium Medicum of Nicolaus Copernicus University, ul. Jagiellońska 13, 85-067 Bydgoszcz, Poland

author

T. Wybranowski

• Medical Physics Division, Biophysics Department, Collegium Medicum of Nicolaus Copernicus University, ul. Jagiellońska 13, 85-067 Bydgoszcz, Poland

author

S. Kruszewski

• Medical Physics Division, Biophysics Department, Collegium Medicum of Nicolaus Copernicus University, ul. Jagiellońska 13, 85-067 Bydgoszcz, Poland

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Identifiers

DOI

10.12693/APhysPolA.125.A-11