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Surface plasmon resonance effects of gold colloids on optical properties of N719 dye in ethanol

MOHAMMED A. AL-AZAWI1, N. BIDIN2,* , M. ABDULLAH2, ABDULRAHMAN K. ALI3, KHALEEL I. HASSOON3, N. A. KHALDOON1, HAYDER J. Al-ASEDY1

Affiliation

  1. Universiti Teknologi Malaysia, Faculty of Science, Department of Physics, Johor Bahru, Johor, Malaysia, 81310
  2. Universiti Teknologi Malaysia, Ibnu Sina Institute for Scientific and Industrial Research, Laser Center, Johor Bahru, Johor Malaysia, 81310
  3. University of Technology, Department of Applied Sciences, Laser and Optoelectronics Branch, Baghdad, Republic of Iraq, 10066

Abstract

In this work, the light absorption and emission effects of gold nanoparticles on some optical properties of N719 dye solution were studied via transmission electron microscopy, UV-vis absorption, and photoluminescence spectroscopy measurements. A facile method to fabricate four gold colloidal solutions with different concentrations containing ~15 nm gold nanoparticles was presented through pulsed laser ablation of a gold target immersed in ethanol, followed by a post-ablated size modification process. As-prepared gold colloids with different concentrations were mixed with certain dye solution. The absorption and fluorescence enhancement that resulted from the interaction between the dipole moments of the day and the surface plasmon resonance of gold nanoparticles were found to be strongly dependent on the gold colloid concentration. Fluorescence was enhanced by around 9-fold, which was achieved for the dye solution with the highest gold nanoparticles concentration..

Keywords

Gold nanoparticles; Surface plasmon resonance; Fluorescence; N719 dye.

Submitted at: Feb. 13, 2015
Accepted at: March 19, 2015

Citation

MOHAMMED A. AL-AZAWI, N. BIDIN, M. ABDULLAH, ABDULRAHMAN K. ALI, KHALEEL I. HASSOON, N. A. KHALDOON, HAYDER J. Al-ASEDY, Surface plasmon resonance effects of gold colloids on optical properties of N719 dye in ethanol, Journal of Optoelectronics and Advanced Materials Vol. 17, Iss. 3-4, pp. 264-269 (2015)