Influence of Silver Colloid on Fluorescein Spectral Properties

• Authors: D. Frąckowiak , A. Balter , J. Karolczak , P. Siejak
• Languages of publication: EN

Abstracts

EN

In order to check if the observed earlier changes in fluorescence intensities of fluorescein solution due to the addition of colloidal suspension of silver are related to the generation of surface plasmon coupled emission, the steady state photothermal spectra and fluorescence decay times of such samples were measured. The Gaussian components of photoacoustic spectra for solutions with and without silver colloid addition were determined and compared with components of absorption and fluorescence excitation spectra of the same samples. The efficiencies of thermal and radiative deactivation of various samples were discussed. The fluorescence decay times measured at the wavelength of excitation not exhibiting the increase in photonic mode density depend only on the dye concentration. Decays exhibit changes as a result of silver addition with excitation in the region in which enhancement of fluorescence is observed. These changes are due not only to the change in the fluorescence yield generated by interactions with plasmons but also to those in thermal deactivation of the sample related to the colloid presence.

Keywords

EN

33.20.-t; 33.20.Kf; 33.50.-j

Discipline

• 33.50.-j: Fluorescence and phosphorescence; radiationless transitions, quenching (intersystem crossing, internal conversion)(for energy transfer, see also section 34; for biophysical applications, see 87.64.kv)
• 33.20.Kf: Visible spectra
• 33.20.-t: Molecular spectra(see also 78.47.J- Ultrafast spectroscopy (<1>

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2006
• Volume: 110
• Issue: 4
• Pages: 451-458

Dates

published

2006-10

received

2006-06-05

(unknown)

2006-07-17

Contributors

author

D. Frąckowiak

• Institute of Physics, Poznań University of Technology, Nieszawska 13A, 60-965 Poznań, Poland

author

A. Balter

• Institute of Physics, N. Copernicus University, Grudziądzka 5/7, 87-100 Toruń, Poland

author

J. Karolczak

• Faculty of Physics, A. Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland

author

P. Siejak

• Institute of Physics, Poznań University of Technology, Nieszawska 13A, 60-965 Poznań, Poland

References

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Identifiers

DOI

10.12693/APhysPolA.110.451