Program

P.40 -- Poster, NCTP-42

Date: Tuesday, 1 August 2017

Time: 16h00 - 17h30

A model for enhancement factor and selection ruler of Surface Enhanced Raman Scattering

Duong Thi Ha (1,2), Le Minh Thanh (3), Tran Thi Thanh Van (2), Nguyen Tri Lan (4), Nguyen Ai Viet (4)

(1) Thai Nguyen university of education; (2) Graduate University of Science and Technology, Vietnam Academy of Science and Technology; (3) Posts and Telecommunications Institute of Technology, Ha Noi, Viet Nam; (4) Institute of Physics, Vietnam Academy of Science and Technology, Ha Noi, Vietnam

Surface-Enhanced Raman Spectroscopy or Surface-Enhanced Raman Scattering (SERS) is a new surface-sensitive technique that enhances Raman scattering by molecules adsorbed with a huge enhancement factor ~1014-16. Therefore, SERS has a great attention on both theory and experiment in many fields as chemistry, physics, materials science, nano-science, and the life sciences. In this work, we propose a new model to explain the huge enhancement factor and the non-usual optical selection rule of SERS. In understanding the mechanism of huge enhancement effect, beside the chemical theory with the formation of charge-transfer complexes, we concentrate our attention to the electromagnetic mechanism with surface plasmon polariton effect. The non-linear electric field mechanism for optical selection ruler also assumed and discussed.

Presenter: Duong Ha