Programme

P.43 -- Poster, NCTP-43

Date: Wednesday, 1 August 2018

Time: 08:30 - 10:00

A new model of Controlling resonance energy transfer in Gold nanopartical emitters

Nguyen Minh Hoa1, Le Anh Thi2, Phung Thi Huyen2

1 Hue University of Medicine and Pharmacy, Hue, Viet Nam 2 Institute of Physics, Vietnam Academy of Science and Technology, Ha Noi, Vietnam

Currently, the mechanisms of Fluorescence Resonance Energy Transfer (FRET) with metallic nanoparticles are still in disagreement with experiments and calculations. We found that: (1) the Förster Resonance Energy Transfer (FRET) process observed the experimental Förster critical transfer distance R0 and energy ratio to be 1–10 nm and respectively, in which R is the distance between Donnor (D) and acceptor (A) dye molecules; (2) the Surface Resonance Energy Transfer (SET) process observed the experimental transfer distance R0 and energy ratio to be 10–100 nm and respectively, where R is distance between D and A where A are gold nanoparticles; (3) the electronic excitation transfer process present while D and A are very far apart with energy ratio is like far field interaction – Coulomb Energy Transfer (CET). A recent work proposed a model with “nanowave emitter station and antenna” that is unified of all three FRET, SET, and CET mechanisms. However, some recent experiments have found an abnormality when observing FRET. In this paper we propose a reverse mechanism and confirm the role of its coulomb interaction, thereby confirming the role of gold nanoparticles as being able to capture fluorescences of concentrations of golden nanoparticles. The paper presents the simple model unifying all 3 FRET, SET, and CET mechanisms, with 6 parameters and 2 overlapping functions. This model agrees quite well with some experimental results.

Presenter: Nguyễn Minh Hoa