Simple Model for Gold Nano Particles Concentration Dependence of Resonance Energy Transfer Intensity

3rd International Workshop on Theoretical and Computational Physics: Complex Systems and Interdisciplinary Physics;40th National Conference on Theoretical Physics

物理学;计算机科学

Hoa, N.M.^1 ; Ha, C.V.^2 ; Nga, D.T.^3 ; Lan, N.T.^3 ; Nhung, T.H.^3 ; Viet, N.A.^3

Hue University of Medicine and Pharmacy, Hue, Viet Nam^1

Thai Nguyen University of Education, Thai Nguyen, Viet Nam^2

Institute of Physics, Vietnam Academy of Science and Technology, Ha Noi, Viet Nam^3

关键词: Concentration dependence;    Energy transfer mechanisms;    Excitation wavelength;    Fluorescence enhancement;    Fluorescent particle;    Forster energy transfer;    Relative concentration;    Surface plasmon polaritons;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/726/1/012009/pdf
DOI  :  10.1088/1742-6596/726/1/012009

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

Gold nano particles (GNPs) concentration dependence of the energy transfer occurs between the fluorophores and GNPs is investigated. In the case of theses pairs, GNPs can enhance or quench the fluorescence of fluorophores depending upon the relative magnitudes of two energy transfer mechanisms: i) the plasmonic field enhancement at the fluorophores emission frequencies (plasmon coupled fluorescence enhancement) and ii) the localized plasmon coupled Forster energy transfer from fluorescent particles to gold particles, which quenches the fluorescence. The competition of these mechanisms is depending on the spectral overlap of fluorophores and GNPs, their relative concentration, excitation wavelength. Simple two branches surface plasmon polariton model for GNPs concentration dependence of the energy transfer is proposed. The experimental data and theoretical results confirm our findings.